???<!-- GIF89;a -->
123123123123
.....................................................................................................................................???<!-- GIF89;a -->
123123123123
.....................................................................................................................................Þ•    5     Ä  õ  l#      @/  *   A/     l/  <   /  $   ¼/  
   á/     ì/     û/     0     !0     60     V0     m0  	   ƒ0     0     Ÿ0     ¶0     Í0     ì0     1     1     41      D1     e1     l1     €1     ˜1  (   ´1  /   Ý1  ;   2  $   I2  :   n2     ©2     ¼2     Ó2  (   ê2  "   3     63     K3     h3  3   †3      º3  &   Û3  &   4  /   )4  /   Y4     ‰4     Ÿ4  .   µ4     ä4  "   5     &5     =5     O5     h5     „5     ¢5  "   ¶5     Ù5     í5     þ5     6     86  /   N6     ~6     ”6     ª6  -   ½6     ë6     7     7     /7     I7     Z7     z7     ’7     §7  !   À7     â7  )   ÿ7     )8     H8     c8     z8     8     ¥8     ¹8      ×8  !   ø8     9  ,   49     a9      t9     •9     ¬9  0   º9  .   ë9     :  0   6:     g:     ‡:     š:     ª:     ½:     Ô:     ì:     ;     ;     :;     H;     f;  &   †;     ­;  /   Ë;     û;     <  )   '<     Q<  &   `<  3   ‡<     »<     Ø<     ô<     	=  &   =     <=     M=     \=     j=  9   =  #   »=     ß=     ö=     >  å  >  H  úA     CE     SE     cE  F  oE     ¶F     ÅF     ÕF     âF  	   îF  	   øF  ú  G     ýL  »
  M     ÍW  ¿  ÖW    –Y  ]  ®[  Ø  ]  U  å`    ;c  ­  Xg  +  k  L  2m  ©   n    )o  ?  -r     mu     ru     {u  t  ‹u  ò    y  ì  óy  º  à  ž   ›Œ  w  :  ÷   ²    ª  ñ   ®‘  g   ’  ò   •  u  û•  ¬  q—  ×  ™  w  öœ     nž  |   vž  Ö   óž  ˆ   ÊŸ  
   S      ^   à  w      X¥     s¥     Ž¥  ?   ¡¥  Ë   á¥     ­¦     Ä¦     Ý¦      ø¦     §     &§     -§  	   =§     G§     P§     d§  	   x§     ‚§  N   ‰§    Ø§    Zª    j®  ,  úµ  =  '·  f   e¸     Ì¸  B  Û¸  †  À     ¥Á  ¬  ªÁ  P   WÊ  x  ¨Ê     !Ð    -Ð  ™  9Ó  ª   ÓÖ  Ô  ~×  ø  SÙ  Ž  LÜ  ¬  ÛÞ    ˆà  ‘  Œá  F   ã  F   eã  L  ¬ã  Æ  ùä  S   Àæ     ç     ç  >  /ç  ,  nê  ?  ›ñ    Ûó  »  ëõ  D   §û     ìû  ã   üû  	   àü  Ä  êü     ¯     ·     È     Ü     ñ  O  ý  *   M 
   x    ƒ    ¡    º 5   Ó O  	 B   Y Õ  œ B   r
 E   µ
    û
            - }  <    º X   Î    ' *   E    p    ~ b  Œ Š  ï    z é   ‰ ¬  s         4 
   L    W    h    z %   ™ $   ¿ '   ä             9    S    n !       ¯    Ì    è    õ '    0   4 .   e    ” 9   ³    í    ö     $   (    M    a    r    € &   ‰ '   ° 3   Ø 9       F “   X .   ì :    3   V 	   Š    ” !   ­    Ï 3   Ý     =   0 -   n    œ '   ¼ &   ä *    *   6 )   a )   ‹ %   µ %   Û      1   " #   T 1   x &   ª &   Ñ &   ø 5        U     d  !     !   £  :   Å      !    !     8! 1   Y! ”   ‹! ¥    " #   Æ" '   ê" $   #    7# $   D# #   i# '   #    µ# /   ½# .   í#    $    ;$    Q$    g$    ~$    Œ$    ª$    ¾$    Ô$ ,   î$ %   % ,   A% %   n%    ”% .   £% @   Ò%    &    &    )& ,   >&    k& #   & @   £&    ä&    ò&    ' -   *' ,   X' '   …'    ­' .   È' ,   ÷' &   $( 0   K( 6   |( P   ³( (   )    -) )   J)    t)    …) "   Ÿ) ?   Â) T   *    W*    h*    ~* 8   Œ* V   Å* &   + '   C+    k+    ‹+    £+ (   °+    Ù+    ì+    û+    , "   &,    I, 5   V, O   Œ,    Ü,    î,     - 	   -    - 5   )-    _-    - 
   ‡- 
   ’- +   - 9   É- ;   . $   ?.    d. d   ‚. $   ç.    /    +/    7/    C/    \/     z/    ›/    ¶/    Ì/ H   Ý/    &0    50    R0    _0 "   r0 +   •0    Á0    Ý0 4   ê0 
   1 D   *1 ?   o1 ,   ¯1    Ü1    ð1 !   2 "   )2 "   L2    o2    2 	   œ2 o   ¦2    3 [   )3 1   …3 /   ·3 )   ç3 3   4    E4 &   _4 2   †4 5   ¹4 ,   ï4 
   5 
   '5 1   25 I   d5 4   ®5 .   ã5 8   6 (   K6 ,   t6 ,   ¡6 0   Î6 )   ÿ6 	   )7    37     ?7 "   `7    ƒ7    Ÿ7    ¹7    Æ7 &   Ó7 =   ú7    88    S8 '   j8    ’8    ©8 ,   Æ8 )   ó8    9 $   <9    a9    w9    ƒ9    –9 "   ©9    Ì9    è9 -   : )   4:    ^:    u: %   ’: .   ¸: -   ç: 7   ; 6   M; 2   „; 1   ·; *   é; ,   < ,   A< ;   n< #   ª<    Î<    Ö<    ì< !   =    .= 6   G=    ~=    ‘= *    = "   Ë=    î= 6   > 	   E>    O> -   _> -   > !   »>    Ý> '   í> '   ?    =?    [? ·  j? I   "A    lA B   ˆA +   ËA 
   ÷A    B    B (   B #   EB 1   iB '   ›B    ÃB 
   ÙB    äB $   ÷B "   C 8   ?C    xC    ˜C =   ¯C    íC &   D    .D    5D    SD ,   rD 2   ŸD ?   ÒD G   E ,   ZE L   ‡E    ÔE ,   íE %   F ?   @F *   €F    «F    ¾F %   ÝF E   G $   IG =   nG ?   ¬G J   ìG Q   7H    ‰H    ¤H 6   ¾H 4   õH 8   *I    cI    ƒI '   ›I .   ÃI )   òI    J 1   6J    hJ    „J .   ¢J "   ÑJ    ôJ 1   K    DK    ]K     vK J   —K    âK ,   úK    'L ,   ;L    hL $   }L (   ¢L !   ËL "   íL .   M -   ?M 9   mM /   §M .   ×M    N !   "N &   DN !   kN 0   N    ¾N /   ÞN '   O =   6O    tO +   ‡O "   ³O    ÖO A   åO ?   'P (   gP >   P -   ÏP +   ýP &   )Q    PQ )   gQ 8   ‘Q    ÊQ '   êQ     R    3R )   JR '   tR (   œR /   ÅR C   õR    9S    OS 5   gS    S A   ²S B   ôS !   7T     YT    zT    —T +   ©T    ÕT    ãT    ôT    U K   !U 0   mU %   žU    ÄU    ÛU H  éU X  2Z    ‹]    £]    ·]   Ð]    a_    }_    _    ¯_ 	   Â_    Ì_ H  Ý_ +   &g ™  Rg    ìs þ  ùs î  øu ¤  çx ý  Œz   Š 1  ¦‚ o  Ø‡   HŒ ¯  æŽ è   – Ö  ‘ M  V•    ¤˜    ©˜    ²˜ u  Â˜ 
  8 V  Cž ù  š¤ Ô   ”´ í  iµ 2  W¸ I  Š¹ ;  Ôº   ¼   ,¿ Ô  <À   Â U  Ä Æ  jÈ 	   1Ê ¡   ;Ê ò   ÝÊ ¶   ÐË    ‡Ì    žÌ ´  ¹Ì    nÒ    ŽÒ    ®Ò Z   ÁÒ   Ó !   7Ô    YÔ %   xÔ '   žÔ '   ÆÔ    îÔ    óÔ    Õ    Õ !   Õ    >Õ    TÕ    [Õ a   gÕ ,  ÉÕ R  öØ ~	  IÞ †  Èç ¢  Oé £   òê )   –ë k  Àë ”  ,ô    Áõ *
  Èõ f   óÿ É  Z     $ À  4   õ
 À    s  Õ ‡  I ?  Ñ !     3 	  J f   T s   » ‡  / ,  ·  v   ä"    [#    h# —  |# K  ' Þ  `/ l  ?2 –  ¬4 8   C;    |; ñ   Š;    |< é  ‹<    uA    A    ›A    ´A    ÍA £  ÝA O   C    ÑC    ãC    þC    D \   =D ›  šD Y   6F 	  F Q   šM R   ìM    ?N    RN    gN    xN ½  ‘N    OQ }   gQ "   åQ ƒ   R    ŒR    ©R &  ÆR à  íU    ÎW   êW œ  Y    ¤\    ¼\    Ú\    ê\    ø\ 3   ] ;   F] =   ‚] >   À]    ÿ] )   ^ 0   F^ .   w^ )   ¦^ L   Ð^ 3   _ !   Q_    s_ -   _ .   ¯_ E   Þ_ 7   $` #   \` M   €`    Î`    Ú`    ì` )   a    5a    Ka    ]a 
   ra 0   }a 9   ®a 6   èa V   b    vb ž   …b C   $c X   hc L   Ác 	   d     d )   9d    cd U   td &   Êd ]   ñd B   Oe +   ’e @   ¾e >   ÿe <   >f C   {f 6   ¿f =   öf 9   4g 3   ng 4   ¢g E   ×g =   h N   [h =   ªh 9   èh =   "i D   `i    ¥i +   ¹i ,   åi ;   j =   Nj $   Œj *   ±j #   Üj D    k ¯   Ek Á   õk 4   ·l ,   ìl )   m    Cm (   Pm *   ym <   ¤m    ám 4   îm K   #n ,   on    œn !   »n    Ýn    ôn %   o    *o    Bo     \o -   }o 6   «o <   âo 7   p    Wp >   jp G   ©p    ñp    úp    q 5   q    Tq 4   hq P   q 
   îq -   ùq     'r A   Hr 1   Šr H   ¼r 4   s N   :s D   ‰s 8   Îs G   t D   Ot l   ”t 6   u *   8u 0   cu 
   ”u    Ÿu 2   ·u [   êu [   Fv    ¢v    ¸v    Ðv 2   áv t   w *   ‰w )   ´w    Þw (   þw    'x &   Bx #   ix    x !   ¤x -   Æx N   ôx 	   Cy =   My U   ‹y    áy !   ôy    z 
   #z    .z S   Mz )   ¡z    Ëz 
   Úz    åz .   òz M   !{ O   o{ w   ¿{ (   7| |   `| 6   Ý| %   }    :}    J} ,   Z} "   ‡} "   ª} )   Í} &   ÷}    ~ r   8~ '   «~ <   Ó~        " 7   > ?   v C   ¶    ú I   
€    T€ w   f€ i   Þ€ S   H    œ &   ° ,   × 4   ‚ "   9‚    \‚    o‚ 	   ‚    —‚    (ƒ k   =ƒ 7   ©ƒ G   áƒ ;   )„ U   e„ $   »„ 4   à„ D   … <   Z… ;   —…    Ó… 
   ä… D   ï… d   4† 5   ™† :   Ï† E   
‡ G   P‡ K   ˜‡ K   ä‡ O   0ˆ 8   €ˆ 	   ¹ˆ    Ãˆ )   Øˆ ,   ‰ "   /‰    R‰    l‰    y‰ 8   ‰‰ ]   Â‰ #    Š "   DŠ A   gŠ    ©Š B   ÇŠ /   
‹ 8   :‹ #   s‹ 6   —‹    Î‹    í‹    ü‹    Œ     +Œ     LŒ    mŒ 2   ‹Œ 0   ¾Œ    ïŒ     C   * Q   n P   À L   Ž N   ^Ž C   ­Ž E   ñŽ J   7 J   ‚ J   Í N    8   g 
        «    Ã 1   ã "   ‘ <   8‘    u‘    ˆ‘ F   —‘ 5   Þ‘ 0   ’ @   E’    †’    ”’ X   ¨’ R   “ 1   T“    †“ '   ”“ +   ¼“ $   è“    ”      !  Ü  É   Ò       Ù      È   _   ¥  •     \   ¤        ·  “   9      ~          ‡       L   ¿  b  “  W       $  Ä                H  y      Ê   8    º   ¯     5              ö           þ               Ô       "            »   ¨  Q   ©   
  Ð   ¶                                     "            À          f   î   *  <  Ý       +   W                            ¸                 k    .   B       u  %  ¸  ô   F   3             &  ¼   ®   K  [    À           a   c                )         ´          «   ¹  š                 ÿ   Ë  m      v       —         Ø   ?   ˜       e         ±  )  ž            g      t  ÷   V                     C           Ç   :         Å   ’  d  ¾   ð  ¡  h  ?  k   ¤       ›        x   )           6      r  I  µ       ¯  °  è  ë  ó   §   Ž  ‘         ä   ì  š         „      ¶       ß      ã       0  Ó  é      †             ¢   ¨   ±   í       D  Í   l  ©      ˆ          (               Y            !       œ  `  -     ²  á  ¾  .  û  Æ       Û   Y  µ          2  i   /   ü   `              T     ï  4       @     Á   s  Z       S   L  "   P    >   X  ñ   	       Î  5   #      1  x  –      á       ò          Ù   ™   Ì                   M   ô  4  ,           I       ³      c   ³  /      ,  U  Ê  Þ   †     S  Ò  â         ÿ  =          Ç          ó  +      l   8       Ð                '   ¼  *  Ÿ  ÷  {  Ñ      õ       J   ð       ú  Š       @      i  #      Ž   s   à   w   |     E  ¥   ƒ  þ   <   €  £  &   q   g   #       ¬     ã          ]   .  Ë     Ï   é         T      (  &  Ÿ   	  2  ý        E   -  ‰   –  Ï  Ý      «      '  p      ç  !       ‚     ø      Ñ       „   6   N   :     >      %  ß   M  ;    Â    e          O       u           î  ¢  A  ý   ,  z  ç          Å  ^      q  ¹      ˜      9   å   È    ²       Ö       ê   Æ  É  %   G   å  Ú       ®  a  Z  ”   |  y   0                 R  H   Ú  G  ù       X   b   ;   z   ò   }   t       â  }  j          o   A   ½  Ø      ^       1  N         Ô  5  ƒ   m     n   ª   =       
      Õ  û   $   Á  ™  ¦  ×  °   4  _      (  ü  2   ¦   ù  Ü     Î   3   æ   ”  ö  •  Ö  Õ   ø   -  1       ]  Œ   3  J             B         í                            è       j  ´     h   7      …       ›   ’              ˆ  /  ñ  	  ú   —              Ó   ·   º  ï       ¡       ×       ‹   Â   n  R        Q     œ           à  O      ­  C  '      $  7   +  §  \  *   »  
           ž               [   ¿             K      Ä  Ã  o  Í  ~   æ    p       P   £       ‰  €   Þ  d   ‚  ‡          ë   w  r   …  ­     F    ì       Ì       Œ             ê           0   ¬  v  D   ª  Ã   Û  ä  ½     ‹  f  V  Š   {   ‘   õ     U        timed out waiting for input: auto-logout
 	-%s or -o option
 	-ilrsD or -c command or -O shopt_option		(invocation only)
 
malloc: %s:%d: assertion botched
   (wd: %s)  (core dumped)  line  $%s: cannot assign in this way %c%c: invalid option %d: invalid file descriptor: %s %s can be invoked via  %s has null exportstr %s is %s
 %s is a function
 %s is a shell builtin
 %s is a shell keyword
 %s is a special shell builtin
 %s is aliased to `%s'
 %s is hashed (%s)
 %s is not bound to any keys.
 %s out of range %s%s%s: %s (error token is "%s") %s: %s %s: %s out of range %s: %s: bad interpreter %s: %s: cannot open as FILE %s: %s: compatibility value out of range %s: %s: invalid value for trace file descriptor %s: %s: must use subscript when assigning associative array %s: %s:%d: cannot allocate %lu bytes %s: %s:%d: cannot allocate %lu bytes (%lu bytes allocated) %s: Is a directory %s: ambiguous job spec %s: ambiguous redirect %s: arguments must be process or job IDs %s: bad network path specification %s: bad substitution %s: binary operator expected %s: cannot allocate %lu bytes %s: cannot allocate %lu bytes (%lu bytes allocated) %s: cannot assign fd to variable %s: cannot assign list to array member %s: cannot assign to non-numeric index %s: cannot convert associative to indexed array %s: cannot convert indexed to associative array %s: cannot create: %s %s: cannot delete: %s %s: cannot destroy array variables in this way %s: cannot execute binary file %s: cannot execute binary file: %s %s: cannot execute: %s %s: cannot export %s: cannot get limit: %s %s: cannot modify limit: %s %s: cannot open temp file: %s %s: cannot open: %s %s: cannot overwrite existing file %s: cannot read: %s %s: cannot unset %s: cannot unset: readonly %s %s: circular name reference %s: command not found %s: error retrieving current directory: %s: %s
 %s: expression error
 %s: file is too large %s: file not found %s: first non-whitespace character is not `"' %s: hash table empty
 %s: history expansion failed %s: host unknown %s: illegal option -- %c
 %s: inlib failed %s: integer expression expected %s: invalid action name %s: invalid argument %s: invalid array origin %s: invalid associative array key %s: invalid callback quantum %s: invalid file descriptor specification %s: invalid indirect expansion %s: invalid limit argument %s: invalid line count %s: invalid option %s: invalid option name %s: invalid service %s: invalid shell option name %s: invalid signal specification %s: invalid timeout specification %s: invalid variable name %s: invalid variable name for name reference %s: is a directory %s: job %d already in background %s: job has terminated %s: line %d:  %s: maximum function nesting level exceeded (%d) %s: maximum source nesting level exceeded (%d) %s: missing colon separator %s: nameref variable self references not allowed %s: no completion specification %s: no job control %s: no such job %s: not a function %s: not a regular file %s: not a shell builtin %s: not an array variable %s: not an indexed array %s: not dynamically loaded %s: not found %s: numeric argument required %s: option requires an argument %s: option requires an argument -- %c
 %s: parameter null or not set %s: quoted compound array assignment deprecated %s: readonly function %s: readonly variable %s: reference variable cannot be an array %s: restricted %s: restricted: cannot redirect output %s: restricted: cannot specify `/' in command names %s: substring expression < 0 %s: unary operator expected %s: unbound variable %s: usage:  %s: variable may not be assigned value (( expression )) (core dumped)  (wd now: %s)
 . filename [arguments] /dev/(tcp|udp)/host/port not supported without networking /tmp must be a valid directory name <no current directory> ABORT instruction Aborting... Add directories to stack.
    
    Adds a directory to the top of the directory stack, or rotates
    the stack, making the new top of the stack the current working
    directory.  With no arguments, exchanges the top two directories.
    
    Options:
      -n	Suppresses the normal change of directory when adding
    		directories to the stack, so only the stack is manipulated.
    
    Arguments:
      +N	Rotates the stack so that the Nth directory (counting
    		from the left of the list shown by `dirs', starting with
    		zero) is at the top.
    
      -N	Rotates the stack so that the Nth directory (counting
    		from the right of the list shown by `dirs', starting with
    		zero) is at the top.
    
      dir	Adds DIR to the directory stack at the top, making it the
    		new current working directory.
    
    The `dirs' builtin displays the directory stack.
    
    Exit Status:
    Returns success unless an invalid argument is supplied or the directory
    change fails. Adds a directory to the top of the directory stack, or rotates
    the stack, making the new top of the stack the current working
    directory.  With no arguments, exchanges the top two directories.
    
    Options:
      -n	Suppresses the normal change of directory when adding
    	directories to the stack, so only the stack is manipulated.
    
    Arguments:
      +N	Rotates the stack so that the Nth directory (counting
    	from the left of the list shown by `dirs', starting with
    	zero) is at the top.
    
      -N	Rotates the stack so that the Nth directory (counting
    	from the right of the list shown by `dirs', starting with
    	zero) is at the top.
    
      dir	Adds DIR to the directory stack at the top, making it the
    	new current working directory.
    
    The `dirs' builtin displays the directory stack. Alarm (profile) Alarm (virtual) Alarm clock Arithmetic for loop.
    
    Equivalent to
    	(( EXP1 ))
    	while (( EXP2 )); do
    		COMMANDS
    		(( EXP3 ))
    	done
    EXP1, EXP2, and EXP3 are arithmetic expressions.  If any expression is
    omitted, it behaves as if it evaluates to 1.
    
    Exit Status:
    Returns the status of the last command executed. BPT trace/trap Bad system call Bogus signal Broken pipe Bus error CPU limit Change the shell working directory.
    
    Change the current directory to DIR.  The default DIR is the value of the
    HOME shell variable.
    
    The variable CDPATH defines the search path for the directory containing
    DIR.  Alternative directory names in CDPATH are separated by a colon (:).
    A null directory name is the same as the current directory.  If DIR begins
    with a slash (/), then CDPATH is not used.
    
    If the directory is not found, and the shell option `cdable_vars' is set,
    the word is assumed to be  a variable name.  If that variable has a value,
    its value is used for DIR.
    
    Options:
      -L	force symbolic links to be followed: resolve symbolic
    		links in DIR after processing instances of `..'
      -P	use the physical directory structure without following
    		symbolic links: resolve symbolic links in DIR before
    		processing instances of `..'
      -e	if the -P option is supplied, and the current working
    		directory cannot be determined successfully, exit with
    		a non-zero status
      -@	on systems that support it, present a file with extended
    		attributes as a directory containing the file attributes
    
    The default is to follow symbolic links, as if `-L' were specified.
    `..' is processed by removing the immediately previous pathname component
    back to a slash or the beginning of DIR.
    
    Exit Status:
    Returns 0 if the directory is changed, and if $PWD is set successfully when
    -P is used; non-zero otherwise. Child death or stop Common shell variable names and usage.
    
    BASH_VERSION	Version information for this Bash.
    CDPATH	A colon-separated list of directories to search
    		for directories given as arguments to `cd'.
    GLOBIGNORE	A colon-separated list of patterns describing filenames to
    		be ignored by pathname expansion.
    HISTFILE	The name of the file where your command history is stored.
    HISTFILESIZE	The maximum number of lines this file can contain.
    HISTSIZE	The maximum number of history lines that a running
    		shell can access.
    HOME	The complete pathname to your login directory.
    HOSTNAME	The name of the current host.
    HOSTTYPE	The type of CPU this version of Bash is running under.
    IGNOREEOF	Controls the action of the shell on receipt of an EOF
    		character as the sole input.  If set, then the value
    		of it is the number of EOF characters that can be seen
    		in a row on an empty line before the shell will exit
    		(default 10).  When unset, EOF signifies the end of input.
    MACHTYPE	A string describing the current system Bash is running on.
    MAILCHECK	How often, in seconds, Bash checks for new mail.
    MAILPATH	A colon-separated list of filenames which Bash checks
    		for new mail.
    OSTYPE	The version of Unix this version of Bash is running on.
    PATH	A colon-separated list of directories to search when
    		looking for commands.
    PROMPT_COMMAND	A command to be executed before the printing of each
    		primary prompt.
    PS1		The primary prompt string.
    PS2		The secondary prompt string.
    PWD		The full pathname of the current directory.
    SHELLOPTS	A colon-separated list of enabled shell options.
    TERM	The name of the current terminal type.
    TIMEFORMAT	The output format for timing statistics displayed by the
    		`time' reserved word.
    auto_resume	Non-null means a command word appearing on a line by
    		itself is first looked for in the list of currently
    		stopped jobs.  If found there, that job is foregrounded.
    		A value of `exact' means that the command word must
    		exactly match a command in the list of stopped jobs.  A
    		value of `substring' means that the command word must
    		match a substring of the job.  Any other value means that
    		the command must be a prefix of a stopped job.
    histchars	Characters controlling history expansion and quick
    		substitution.  The first character is the history
    		substitution character, usually `!'.  The second is
    		the `quick substitution' character, usually `^'.  The
    		third is the `history comment' character, usually `#'.
    HISTIGNORE	A colon-separated list of patterns used to decide which
    		commands should be saved on the history list.
 Continue Define local variables.
    
    Create a local variable called NAME, and give it VALUE.  OPTION can
    be any option accepted by `declare'.
    
    Local variables can only be used within a function; they are visible
    only to the function where they are defined and its children.
    
    Exit Status:
    Returns success unless an invalid option is supplied, a variable
    assignment error occurs, or the shell is not executing a function. Define or display aliases.
    
    Without arguments, `alias' prints the list of aliases in the reusable
    form `alias NAME=VALUE' on standard output.
    
    Otherwise, an alias is defined for each NAME whose VALUE is given.
    A trailing space in VALUE causes the next word to be checked for
    alias substitution when the alias is expanded.
    
    Options:
      -p	print all defined aliases in a reusable format
    
    Exit Status:
    alias returns true unless a NAME is supplied for which no alias has been
    defined. Define shell function.
    
    Create a shell function named NAME.  When invoked as a simple command,
    NAME runs COMMANDs in the calling shell's context.  When NAME is invoked,
    the arguments are passed to the function as $1...$n, and the function's
    name is in $FUNCNAME.
    
    Exit Status:
    Returns success unless NAME is readonly. Display directory stack.
    
    Display the list of currently remembered directories.  Directories
    find their way onto the list with the `pushd' command; you can get
    back up through the list with the `popd' command.
    
    Options:
      -c	clear the directory stack by deleting all of the elements
      -l	do not print tilde-prefixed versions of directories relative
    		to your home directory
      -p	print the directory stack with one entry per line
      -v	print the directory stack with one entry per line prefixed
    		with its position in the stack
    
    Arguments:
      +N	Displays the Nth entry counting from the left of the list
    		shown by dirs when invoked without options, starting with
    		zero.
    
      -N	Displays the Nth entry counting from the right of the list
    		shown by dirs when invoked without options, starting with
    		zero.
    
    Exit Status:
    Returns success unless an invalid option is supplied or an error occurs. Display information about builtin commands.
    
    Displays brief summaries of builtin commands.  If PATTERN is
    specified, gives detailed help on all commands matching PATTERN,
    otherwise the list of help topics is printed.
    
    Options:
      -d	output short description for each topic
      -m	display usage in pseudo-manpage format
      -s	output only a short usage synopsis for each topic matching
    		PATTERN
    
    Arguments:
      PATTERN	Pattern specifiying a help topic
    
    Exit Status:
    Returns success unless PATTERN is not found or an invalid option is given. Display information about command type.
    
    For each NAME, indicate how it would be interpreted if used as a
    command name.
    
    Options:
      -a	display all locations containing an executable named NAME;
    		includes aliases, builtins, and functions, if and only if
    		the `-p' option is not also used
      -f	suppress shell function lookup
      -P	force a PATH search for each NAME, even if it is an alias,
    		builtin, or function, and returns the name of the disk file
    		that would be executed
      -p	returns either the name of the disk file that would be executed,
    		or nothing if `type -t NAME' would not return `file'
      -t	output a single word which is one of `alias', `keyword',
    		`function', `builtin', `file' or `', if NAME is an alias,
    		shell reserved word, shell function, shell builtin, disk file,
    		or not found, respectively
    
    Arguments:
      NAME	Command name to be interpreted.
    
    Exit Status:
    Returns success if all of the NAMEs are found; fails if any are not found. Display or execute commands from the history list.
    
    fc is used to list or edit and re-execute commands from the history list.
    FIRST and LAST can be numbers specifying the range, or FIRST can be a
    string, which means the most recent command beginning with that
    string.
    
    Options:
      -e ENAME	select which editor to use.  Default is FCEDIT, then EDITOR,
    		then vi
      -l 	list lines instead of editing
      -n	omit line numbers when listing
      -r	reverse the order of the lines (newest listed first)
    
    With the `fc -s [pat=rep ...] [command]' format, COMMAND is
    re-executed after the substitution OLD=NEW is performed.
    
    A useful alias to use with this is r='fc -s', so that typing `r cc'
    runs the last command beginning with `cc' and typing `r' re-executes
    the last command.
    
    Exit Status:
    Returns success or status of executed command; non-zero if an error occurs. Display or set file mode mask.
    
    Sets the user file-creation mask to MODE.  If MODE is omitted, prints
    the current value of the mask.
    
    If MODE begins with a digit, it is interpreted as an octal number;
    otherwise it is a symbolic mode string like that accepted by chmod(1).
    
    Options:
      -p	if MODE is omitted, output in a form that may be reused as input
      -S	makes the output symbolic; otherwise an octal number is output
    
    Exit Status:
    Returns success unless MODE is invalid or an invalid option is given. Display possible completions depending on the options.
    
    Intended to be used from within a shell function generating possible
    completions.  If the optional WORD argument is supplied, matches against
    WORD are generated.
    
    Exit Status:
    Returns success unless an invalid option is supplied or an error occurs. Display process times.
    
    Prints the accumulated user and system times for the shell and all of its
    child processes.
    
    Exit Status:
    Always succeeds. Display status of jobs.
    
    Lists the active jobs.  JOBSPEC restricts output to that job.
    Without options, the status of all active jobs is displayed.
    
    Options:
      -l	lists process IDs in addition to the normal information
      -n	lists only processes that have changed status since the last
    		notification
      -p	lists process IDs only
      -r	restrict output to running jobs
      -s	restrict output to stopped jobs
    
    If -x is supplied, COMMAND is run after all job specifications that
    appear in ARGS have been replaced with the process ID of that job's
    process group leader.
    
    Exit Status:
    Returns success unless an invalid option is given or an error occurs.
    If -x is used, returns the exit status of COMMAND. Display the list of currently remembered directories.  Directories
    find their way onto the list with the `pushd' command; you can get
    back up through the list with the `popd' command.
    
    Options:
      -c	clear the directory stack by deleting all of the elements
      -l	do not print tilde-prefixed versions of directories relative
    	to your home directory
      -p	print the directory stack with one entry per line
      -v	print the directory stack with one entry per line prefixed
    	with its position in the stack
    
    Arguments:
      +N	Displays the Nth entry counting from the left of the list shown by
    	dirs when invoked without options, starting with zero.
    
      -N	Displays the Nth entry counting from the right of the list shown by
	dirs when invoked without options, starting with zero. Done Done(%d) EMT instruction Enable and disable shell builtins.
    
    Enables and disables builtin shell commands.  Disabling allows you to
    execute a disk command which has the same name as a shell builtin
    without using a full pathname.
    
    Options:
      -a	print a list of builtins showing whether or not each is enabled
      -n	disable each NAME or display a list of disabled builtins
      -p	print the list of builtins in a reusable format
      -s	print only the names of Posix `special' builtins
    
    Options controlling dynamic loading:
      -f	Load builtin NAME from shared object FILENAME
      -d	Remove a builtin loaded with -f
    
    Without options, each NAME is enabled.
    
    To use the `test' found in $PATH instead of the shell builtin
    version, type `enable -n test'.
    
    Exit Status:
    Returns success unless NAME is not a shell builtin or an error occurs. Evaluate arithmetic expression.
    
    The EXPRESSION is evaluated according to the rules for arithmetic
    evaluation.  Equivalent to "let EXPRESSION".
    
    Exit Status:
    Returns 1 if EXPRESSION evaluates to 0; returns 0 otherwise. Evaluate arithmetic expressions.
    
    Evaluate each ARG as an arithmetic expression.  Evaluation is done in
    fixed-width integers with no check for overflow, though division by 0
    is trapped and flagged as an error.  The following list of operators is
    grouped into levels of equal-precedence operators.  The levels are listed
    in order of decreasing precedence.
    
    	id++, id--	variable post-increment, post-decrement
    	++id, --id	variable pre-increment, pre-decrement
    	-, +		unary minus, plus
    	!, ~		logical and bitwise negation
    	**		exponentiation
    	*, /, %		multiplication, division, remainder
    	+, -		addition, subtraction
    	<<, >>		left and right bitwise shifts
    	<=, >=, <, >	comparison
    	==, !=		equality, inequality
    	&		bitwise AND
    	^		bitwise XOR
    	|		bitwise OR
    	&&		logical AND
    	||		logical OR
    	expr ? expr : expr
    			conditional operator
    	=, *=, /=, %=,
    	+=, -=, <<=, >>=,
    	&=, ^=, |=	assignment
    
    Shell variables are allowed as operands.  The name of the variable
    is replaced by its value (coerced to a fixed-width integer) within
    an expression.  The variable need not have its integer attribute
    turned on to be used in an expression.
    
    Operators are evaluated in order of precedence.  Sub-expressions in
    parentheses are evaluated first and may override the precedence
    rules above.
    
    Exit Status:
    If the last ARG evaluates to 0, let returns 1; let returns 0 otherwise. Evaluate conditional expression.
    
    Exits with a status of 0 (true) or 1 (false) depending on
    the evaluation of EXPR.  Expressions may be unary or binary.  Unary
    expressions are often used to examine the status of a file.  There
    are string operators and numeric comparison operators as well.
    
    The behavior of test depends on the number of arguments.  Read the
    bash manual page for the complete specification.
    
    File operators:
    
      -a FILE        True if file exists.
      -b FILE        True if file is block special.
      -c FILE        True if file is character special.
      -d FILE        True if file is a directory.
      -e FILE        True if file exists.
      -f FILE        True if file exists and is a regular file.
      -g FILE        True if file is set-group-id.
      -h FILE        True if file is a symbolic link.
      -L FILE        True if file is a symbolic link.
      -k FILE        True if file has its `sticky' bit set.
      -p FILE        True if file is a named pipe.
      -r FILE        True if file is readable by you.
      -s FILE        True if file exists and is not empty.
      -S FILE        True if file is a socket.
      -t FD          True if FD is opened on a terminal.
      -u FILE        True if the file is set-user-id.
      -w FILE        True if the file is writable by you.
      -x FILE        True if the file is executable by you.
      -O FILE        True if the file is effectively owned by you.
      -G FILE        True if the file is effectively owned by your group.
      -N FILE        True if the file has been modified since it was last read.
    
      FILE1 -nt FILE2  True if file1 is newer than file2 (according to
                       modification date).
    
      FILE1 -ot FILE2  True if file1 is older than file2.
    
      FILE1 -ef FILE2  True if file1 is a hard link to file2.
    
    String operators:
    
      -z STRING      True if string is empty.
    
      -n STRING
         STRING      True if string is not empty.
    
      STRING1 = STRING2
                     True if the strings are equal.
      STRING1 != STRING2
                     True if the strings are not equal.
      STRING1 < STRING2
                     True if STRING1 sorts before STRING2 lexicographically.
      STRING1 > STRING2
                     True if STRING1 sorts after STRING2 lexicographically.
    
    Other operators:
    
      -o OPTION      True if the shell option OPTION is enabled.
      -v VAR         True if the shell variable VAR is set.
      -R VAR         True if the shell variable VAR is set and is a name
                     reference.
      ! EXPR         True if expr is false.
      EXPR1 -a EXPR2 True if both expr1 AND expr2 are true.
      EXPR1 -o EXPR2 True if either expr1 OR expr2 is true.
    
      arg1 OP arg2   Arithmetic tests.  OP is one of -eq, -ne,
                     -lt, -le, -gt, or -ge.
    
    Arithmetic binary operators return true if ARG1 is equal, not-equal,
    less-than, less-than-or-equal, greater-than, or greater-than-or-equal
    than ARG2.
    
    Exit Status:
    Returns success if EXPR evaluates to true; fails if EXPR evaluates to
    false or an invalid argument is given. Evaluate conditional expression.
    
    This is a synonym for the "test" builtin, but the last argument must
    be a literal `]', to match the opening `['. Execute a simple command or display information about commands.
    
    Runs COMMAND with ARGS suppressing  shell function lookup, or display
    information about the specified COMMANDs.  Can be used to invoke commands
    on disk when a function with the same name exists.
    
    Options:
      -p    use a default value for PATH that is guaranteed to find all of
            the standard utilities
      -v    print a description of COMMAND similar to the `type' builtin
      -V    print a more verbose description of each COMMAND
    
    Exit Status:
    Returns exit status of COMMAND, or failure if COMMAND is not found. Execute arguments as a shell command.
    
    Combine ARGs into a single string, use the result as input to the shell,
    and execute the resulting commands.
    
    Exit Status:
    Returns exit status of command or success if command is null. Execute commands as long as a test does not succeed.
    
    Expand and execute COMMANDS as long as the final command in the
    `until' COMMANDS has an exit status which is not zero.
    
    Exit Status:
    Returns the status of the last command executed. Execute commands as long as a test succeeds.
    
    Expand and execute COMMANDS as long as the final command in the
    `while' COMMANDS has an exit status of zero.
    
    Exit Status:
    Returns the status of the last command executed. Execute commands based on conditional.
    
    The `if COMMANDS' list is executed.  If its exit status is zero, then the
    `then COMMANDS' list is executed.  Otherwise, each `elif COMMANDS' list is
    executed in turn, and if its exit status is zero, the corresponding
    `then COMMANDS' list is executed and the if command completes.  Otherwise,
    the `else COMMANDS' list is executed, if present.  The exit status of the
    entire construct is the exit status of the last command executed, or zero
    if no condition tested true.
    
    Exit Status:
    Returns the status of the last command executed. Execute commands based on pattern matching.
    
    Selectively execute COMMANDS based upon WORD matching PATTERN.  The
    `|' is used to separate multiple patterns.
    
    Exit Status:
    Returns the status of the last command executed. Execute commands for each member in a list.
    
    The `for' loop executes a sequence of commands for each member in a
    list of items.  If `in WORDS ...;' is not present, then `in "$@"' is
    assumed.  For each element in WORDS, NAME is set to that element, and
    the COMMANDS are executed.
    
    Exit Status:
    Returns the status of the last command executed. Execute commands from a file in the current shell.
    
    Read and execute commands from FILENAME in the current shell.  The
    entries in $PATH are used to find the directory containing FILENAME.
    If any ARGUMENTS are supplied, they become the positional parameters
    when FILENAME is executed.
    
    Exit Status:
    Returns the status of the last command executed in FILENAME; fails if
    FILENAME cannot be read. Execute conditional command.
    
    Returns a status of 0 or 1 depending on the evaluation of the conditional
    expression EXPRESSION.  Expressions are composed of the same primaries used
    by the `test' builtin, and may be combined using the following operators:
    
      ( EXPRESSION )	Returns the value of EXPRESSION
      ! EXPRESSION		True if EXPRESSION is false; else false
      EXPR1 && EXPR2	True if both EXPR1 and EXPR2 are true; else false
      EXPR1 || EXPR2	True if either EXPR1 or EXPR2 is true; else false
    
    When the `==' and `!=' operators are used, the string to the right of
    the operator is used as a pattern and pattern matching is performed.
    When the `=~' operator is used, the string to the right of the operator
    is matched as a regular expression.
    
    The && and || operators do not evaluate EXPR2 if EXPR1 is sufficient to
    determine the expression's value.
    
    Exit Status:
    0 or 1 depending on value of EXPRESSION. Execute shell builtins.
    
    Execute SHELL-BUILTIN with arguments ARGs without performing command
    lookup.  This is useful when you wish to reimplement a shell builtin
    as a shell function, but need to execute the builtin within the function.
    
    Exit Status:
    Returns the exit status of SHELL-BUILTIN, or false if SHELL-BUILTIN is
    not a shell builtin.. Exit %d Exit a login shell.
    
    Exits a login shell with exit status N.  Returns an error if not executed
    in a login shell. Exit for, while, or until loops.
    
    Exit a FOR, WHILE or UNTIL loop.  If N is specified, break N enclosing
    loops.
    
    Exit Status:
    The exit status is 0 unless N is not greater than or equal to 1. Exit the shell.
    
    Exits the shell with a status of N.  If N is omitted, the exit status
    is that of the last command executed. File limit Floating point exception Formats and prints ARGUMENTS under control of the FORMAT.
    
    Options:
      -v var	assign the output to shell variable VAR rather than
    		display it on the standard output
    
    FORMAT is a character string which contains three types of objects: plain
    characters, which are simply copied to standard output; character escape
    sequences, which are converted and copied to the standard output; and
    format specifications, each of which causes printing of the next successive
    argument.
    
    In addition to the standard format specifications described in printf(1),
    printf interprets:
    
      %b	expand backslash escape sequences in the corresponding argument
      %q	quote the argument in a way that can be reused as shell input
      %(fmt)T	output the date-time string resulting from using FMT as a format
    	        string for strftime(3)
    
    The format is re-used as necessary to consume all of the arguments.  If
    there are fewer arguments than the format requires,  extra format
    specifications behave as if a zero value or null string, as appropriate,
    had been supplied.
    
    Exit Status:
    Returns success unless an invalid option is given or a write or assignment
    error occurs. GNU bash, version %s (%s)
 GNU bash, version %s-(%s)
 GNU long options:
 General help using GNU software: <http://www.gnu.org/gethelp/>
 Group commands as a unit.
    
    Run a set of commands in a group.  This is one way to redirect an
    entire set of commands.
    
    Exit Status:
    Returns the status of the last command executed. HFT input data pending HFT monitor mode granted HFT monitor mode retracted HFT sound sequence has completed HOME not set Hangup I have no name! I/O ready INFORM:  Illegal instruction Information request Interrupt Killed License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
 Mark shell variables as unchangeable.
    
    Mark each NAME as read-only; the values of these NAMEs may not be
    changed by subsequent assignment.  If VALUE is supplied, assign VALUE
    before marking as read-only.
    
    Options:
      -a	refer to indexed array variables
      -A	refer to associative array variables
      -f	refer to shell functions
      -p	display a list of all readonly variables or functions,
    		depending on whether or not the -f option is given
    
    An argument of `--' disables further option processing.
    
    Exit Status:
    Returns success unless an invalid option is given or NAME is invalid. Modify or display completion options.
    
    Modify the completion options for each NAME, or, if no NAMEs are supplied,
    the completion currently being executed.  If no OPTIONs are given, print
    the completion options for each NAME or the current completion specification.
    
    Options:
    	-o option	Set completion option OPTION for each NAME
    	-D		Change options for the "default" command completion
    	-E		Change options for the "empty" command completion
    
    Using `+o' instead of `-o' turns off the specified option.
    
    Arguments:
    
    Each NAME refers to a command for which a completion specification must
    have previously been defined using the `complete' builtin.  If no NAMEs
    are supplied, compopt must be called by a function currently generating
    completions, and the options for that currently-executing completion
    generator are modified.
    
    Exit Status:
    Returns success unless an invalid option is supplied or NAME does not
    have a completion specification defined. Modify shell resource limits.
    
    Provides control over the resources available to the shell and processes
    it creates, on systems that allow such control.
    
    Options:
      -S	use the `soft' resource limit
      -H	use the `hard' resource limit
      -a	all current limits are reported
      -b	the socket buffer size
      -c	the maximum size of core files created
      -d	the maximum size of a process's data segment
      -e	the maximum scheduling priority (`nice')
      -f	the maximum size of files written by the shell and its children
      -i	the maximum number of pending signals
      -k	the maximum number of kqueues allocated for this process
      -l	the maximum size a process may lock into memory
      -m	the maximum resident set size
      -n	the maximum number of open file descriptors
      -p	the pipe buffer size
      -q	the maximum number of bytes in POSIX message queues
      -r	the maximum real-time scheduling priority
      -s	the maximum stack size
      -t	the maximum amount of cpu time in seconds
      -u	the maximum number of user processes
      -v	the size of virtual memory
      -x	the maximum number of file locks
      -P	the maximum number of pseudoterminals
      -T	the maximum number of threads
    
    Not all options are available on all platforms.
    
    If LIMIT is given, it is the new value of the specified resource; the
    special LIMIT values `soft', `hard', and `unlimited' stand for the
    current soft limit, the current hard limit, and no limit, respectively.
    Otherwise, the current value of the specified resource is printed.  If
    no option is given, then -f is assumed.
    
    Values are in 1024-byte increments, except for -t, which is in seconds,
    -p, which is in increments of 512 bytes, and -u, which is an unscaled
    number of processes.
    
    Exit Status:
    Returns success unless an invalid option is supplied or an error occurs. Move job to the foreground.
    
    Place the job identified by JOB_SPEC in the foreground, making it the
    current job.  If JOB_SPEC is not present, the shell's notion of the
    current job is used.
    
    Exit Status:
    Status of command placed in foreground, or failure if an error occurs. Move jobs to the background.
    
    Place the jobs identified by each JOB_SPEC in the background, as if they
    had been started with `&'.  If JOB_SPEC is not present, the shell's notion
    of the current job is used.
    
    Exit Status:
    Returns success unless job control is not enabled or an error occurs. Null command.
    
    No effect; the command does nothing.
    
    Exit Status:
    Always succeeds. OLDPWD not set Parse option arguments.
    
    Getopts is used by shell procedures to parse positional parameters
    as options.
    
    OPTSTRING contains the option letters to be recognized; if a letter
    is followed by a colon, the option is expected to have an argument,
    which should be separated from it by white space.
    
    Each time it is invoked, getopts will place the next option in the
    shell variable $name, initializing name if it does not exist, and
    the index of the next argument to be processed into the shell
    variable OPTIND.  OPTIND is initialized to 1 each time the shell or
    a shell script is invoked.  When an option requires an argument,
    getopts places that argument into the shell variable OPTARG.
    
    getopts reports errors in one of two ways.  If the first character
    of OPTSTRING is a colon, getopts uses silent error reporting.  In
    this mode, no error messages are printed.  If an invalid option is
    seen, getopts places the option character found into OPTARG.  If a
    required argument is not found, getopts places a ':' into NAME and
    sets OPTARG to the option character found.  If getopts is not in
    silent mode, and an invalid option is seen, getopts places '?' into
    NAME and unsets OPTARG.  If a required argument is not found, a '?'
    is placed in NAME, OPTARG is unset, and a diagnostic message is
    printed.
    
    If the shell variable OPTERR has the value 0, getopts disables the
    printing of error messages, even if the first character of
    OPTSTRING is not a colon.  OPTERR has the value 1 by default.
    
    Getopts normally parses the positional parameters ($0 - $9), but if
    more arguments are given, they are parsed instead.
    
    Exit Status:
    Returns success if an option is found; fails if the end of options is
    encountered or an error occurs. Print the name of the current working directory.
    
    Options:
      -L	print the value of $PWD if it names the current working
    		directory
      -P	print the physical directory, without any symbolic links
    
    By default, `pwd' behaves as if `-L' were specified.
    
    Exit Status:
    Returns 0 unless an invalid option is given or the current directory
    cannot be read. Quit Read a line from the standard input and split it into fields.
    
    Reads a single line from the standard input, or from file descriptor FD
    if the -u option is supplied.  The line is split into fields as with word
    splitting, and the first word is assigned to the first NAME, the second
    word to the second NAME, and so on, with any leftover words assigned to
    the last NAME.  Only the characters found in $IFS are recognized as word
    delimiters.
    
    If no NAMEs are supplied, the line read is stored in the REPLY variable.
    
    Options:
      -a array	assign the words read to sequential indices of the array
    		variable ARRAY, starting at zero
      -d delim	continue until the first character of DELIM is read, rather
    		than newline
      -e	use Readline to obtain the line in an interactive shell
      -i text	use TEXT as the initial text for Readline
      -n nchars	return after reading NCHARS characters rather than waiting
    		for a newline, but honor a delimiter if fewer than
    		NCHARS characters are read before the delimiter
      -N nchars	return only after reading exactly NCHARS characters, unless
    		EOF is encountered or read times out, ignoring any
    		delimiter
      -p prompt	output the string PROMPT without a trailing newline before
    		attempting to read
      -r	do not allow backslashes to escape any characters
      -s	do not echo input coming from a terminal
      -t timeout	time out and return failure if a complete line of
    		input is not read within TIMEOUT seconds.  The value of the
    		TMOUT variable is the default timeout.  TIMEOUT may be a
    		fractional number.  If TIMEOUT is 0, read returns
    		immediately, without trying to read any data, returning
    		success only if input is available on the specified
    		file descriptor.  The exit status is greater than 128
    		if the timeout is exceeded
      -u fd	read from file descriptor FD instead of the standard input
    
    Exit Status:
    The return code is zero, unless end-of-file is encountered, read times out
    (in which case it's greater than 128), a variable assignment error occurs,
    or an invalid file descriptor is supplied as the argument to -u. Read lines from a file into an array variable.
    
    A synonym for `mapfile'. Read lines from the standard input into an indexed array variable.
    
    Read lines from the standard input into the indexed array variable ARRAY, or
    from file descriptor FD if the -u option is supplied.  The variable MAPFILE
    is the default ARRAY.
    
    Options:
      -d delim	Use DELIM to terminate lines, instead of newline
      -n count	Copy at most COUNT lines.  If COUNT is 0, all lines are copied
      -O origin	Begin assigning to ARRAY at index ORIGIN.  The default index is 0
      -s count	Discard the first COUNT lines read
      -t	Remove a trailing DELIM from each line read (default newline)
      -u fd	Read lines from file descriptor FD instead of the standard input
      -C callback	Evaluate CALLBACK each time QUANTUM lines are read
      -c quantum	Specify the number of lines read between each call to
    			CALLBACK
    
    Arguments:
      ARRAY	Array variable name to use for file data
    
    If -C is supplied without -c, the default quantum is 5000.  When
    CALLBACK is evaluated, it is supplied the index of the next array
    element to be assigned and the line to be assigned to that element
    as additional arguments.
    
    If not supplied with an explicit origin, mapfile will clear ARRAY before
    assigning to it.
    
    Exit Status:
    Returns success unless an invalid option is given or ARRAY is readonly or
    not an indexed array. Record lock Remember or display program locations.
    
    Determine and remember the full pathname of each command NAME.  If
    no arguments are given, information about remembered commands is displayed.
    
    Options:
      -d	forget the remembered location of each NAME
      -l	display in a format that may be reused as input
      -p pathname	use PATHNAME as the full pathname of NAME
      -r	forget all remembered locations
      -t	print the remembered location of each NAME, preceding
    		each location with the corresponding NAME if multiple
    		NAMEs are given
    Arguments:
      NAME	Each NAME is searched for in $PATH and added to the list
    		of remembered commands.
    
    Exit Status:
    Returns success unless NAME is not found or an invalid option is given. Remove directories from stack.
    
    Removes entries from the directory stack.  With no arguments, removes
    the top directory from the stack, and changes to the new top directory.
    
    Options:
      -n	Suppresses the normal change of directory when removing
    		directories from the stack, so only the stack is manipulated.
    
    Arguments:
      +N	Removes the Nth entry counting from the left of the list
    		shown by `dirs', starting with zero.  For example: `popd +0'
    		removes the first directory, `popd +1' the second.
    
      -N	Removes the Nth entry counting from the right of the list
    		shown by `dirs', starting with zero.  For example: `popd -0'
    		removes the last directory, `popd -1' the next to last.
    
    The `dirs' builtin displays the directory stack.
    
    Exit Status:
    Returns success unless an invalid argument is supplied or the directory
    change fails. Remove each NAME from the list of defined aliases.
    
    Options:
      -a	remove all alias definitions
    
    Return success unless a NAME is not an existing alias. Remove jobs from current shell.
    
    Removes each JOBSPEC argument from the table of active jobs.  Without
    any JOBSPECs, the shell uses its notion of the current job.
    
    Options:
      -a	remove all jobs if JOBSPEC is not supplied
      -h	mark each JOBSPEC so that SIGHUP is not sent to the job if the
    		shell receives a SIGHUP
      -r	remove only running jobs
    
    Exit Status:
    Returns success unless an invalid option or JOBSPEC is given. Removes entries from the directory stack.  With no arguments, removes
    the top directory from the stack, and changes to the new top directory.
    
    Options:
      -n	Suppresses the normal change of directory when removing
    	directories from the stack, so only the stack is manipulated.
    
    Arguments:
      +N	Removes the Nth entry counting from the left of the list
    	shown by `dirs', starting with zero.  For example: `popd +0'
    	removes the first directory, `popd +1' the second.
    
      -N	Removes the Nth entry counting from the right of the list
    	shown by `dirs', starting with zero.  For example: `popd -0'
    	removes the last directory, `popd -1' the next to last.
    
    The `dirs' builtin displays the directory stack. Replace the shell with the given command.
    
    Execute COMMAND, replacing this shell with the specified program.
    ARGUMENTS become the arguments to COMMAND.  If COMMAND is not specified,
    any redirections take effect in the current shell.
    
    Options:
      -a name	pass NAME as the zeroth argument to COMMAND
      -c	execute COMMAND with an empty environment
      -l	place a dash in the zeroth argument to COMMAND
    
    If the command cannot be executed, a non-interactive shell exits, unless
    the shell option `execfail' is set.
    
    Exit Status:
    Returns success unless COMMAND is not found or a redirection error occurs. Report time consumed by pipeline's execution.
    
    Execute PIPELINE and print a summary of the real time, user CPU time,
    and system CPU time spent executing PIPELINE when it terminates.
    
    Options:
      -p	print the timing summary in the portable Posix format
    
    The value of the TIMEFORMAT variable is used as the output format.
    
    Exit Status:
    The return status is the return status of PIPELINE. Resume for, while, or until loops.
    
    Resumes the next iteration of the enclosing FOR, WHILE or UNTIL loop.
    If N is specified, resumes the Nth enclosing loop.
    
    Exit Status:
    The exit status is 0 unless N is not greater than or equal to 1. Resume job in foreground.
    
    Equivalent to the JOB_SPEC argument to the `fg' command.  Resume a
    stopped or background job.  JOB_SPEC can specify either a job name
    or a job number.  Following JOB_SPEC with a `&' places the job in
    the background, as if the job specification had been supplied as an
    argument to `bg'.
    
    Exit Status:
    Returns the status of the resumed job. Return a successful result.
    
    Exit Status:
    Always succeeds. Return an unsuccessful result.
    
    Exit Status:
    Always fails. Return from a shell function.
    
    Causes a function or sourced script to exit with the return value
    specified by N.  If N is omitted, the return status is that of the
    last command executed within the function or script.
    
    Exit Status:
    Returns N, or failure if the shell is not executing a function or script. Return the context of the current subroutine call.
    
    Without EXPR, returns "$line $filename".  With EXPR, returns
    "$line $subroutine $filename"; this extra information can be used to
    provide a stack trace.
    
    The value of EXPR indicates how many call frames to go back before the
    current one; the top frame is frame 0.
    
    Exit Status:
    Returns 0 unless the shell is not executing a shell function or EXPR
    is invalid. Returns the context of the current subroutine call.
    
    Without EXPR, returns  Running Segmentation fault Select words from a list and execute commands.
    
    The WORDS are expanded, generating a list of words.  The
    set of expanded words is printed on the standard error, each
    preceded by a number.  If `in WORDS' is not present, `in "$@"'
    is assumed.  The PS3 prompt is then displayed and a line read
    from the standard input.  If the line consists of the number
    corresponding to one of the displayed words, then NAME is set
    to that word.  If the line is empty, WORDS and the prompt are
    redisplayed.  If EOF is read, the command completes.  Any other
    value read causes NAME to be set to null.  The line read is saved
    in the variable REPLY.  COMMANDS are executed after each selection
    until a break command is executed.
    
    Exit Status:
    Returns the status of the last command executed. Set Readline key bindings and variables.
    
    Bind a key sequence to a Readline function or a macro, or set a
    Readline variable.  The non-option argument syntax is equivalent to
    that found in ~/.inputrc, but must be passed as a single argument:
    e.g., bind '"\C-x\C-r": re-read-init-file'.
    
    Options:
      -m  keymap         Use KEYMAP as the keymap for the duration of this
                         command.  Acceptable keymap names are emacs,
                         emacs-standard, emacs-meta, emacs-ctlx, vi, vi-move,
                         vi-command, and vi-insert.
      -l                 List names of functions.
      -P                 List function names and bindings.
      -p                 List functions and bindings in a form that can be
                         reused as input.
      -S                 List key sequences that invoke macros and their values
      -s                 List key sequences that invoke macros and their values
                         in a form that can be reused as input.
      -V                 List variable names and values
      -v                 List variable names and values in a form that can
                         be reused as input.
      -q  function-name  Query about which keys invoke the named function.
      -u  function-name  Unbind all keys which are bound to the named function.
      -r  keyseq         Remove the binding for KEYSEQ.
      -f  filename       Read key bindings from FILENAME.
      -x  keyseq:shell-command	Cause SHELL-COMMAND to be executed when
    				KEYSEQ is entered.
      -X                 List key sequences bound with -x and associated commands
                         in a form that can be reused as input.
    
    Exit Status:
    bind returns 0 unless an unrecognized option is given or an error occurs. Set and unset shell options.
    
    Change the setting of each shell option OPTNAME.  Without any option
    arguments, list all shell options with an indication of whether or not each
    is set.
    
    Options:
      -o	restrict OPTNAMEs to those defined for use with `set -o'
      -p	print each shell option with an indication of its status
      -q	suppress output
      -s	enable (set) each OPTNAME
      -u	disable (unset) each OPTNAME
    
    Exit Status:
    Returns success if OPTNAME is enabled; fails if an invalid option is
    given or OPTNAME is disabled. Set export attribute for shell variables.
    
    Marks each NAME for automatic export to the environment of subsequently
    executed commands.  If VALUE is supplied, assign VALUE before exporting.
    
    Options:
      -f	refer to shell functions
      -n	remove the export property from each NAME
      -p	display a list of all exported variables and functions
    
    An argument of `--' disables further option processing.
    
    Exit Status:
    Returns success unless an invalid option is given or NAME is invalid. Set variable values and attributes.
    
    Declare variables and give them attributes.  If no NAMEs are given,
    display the attributes and values of all variables.
    
    Options:
      -f	restrict action or display to function names and definitions
      -F	restrict display to function names only (plus line number and
    		source file when debugging)
      -g	create global variables when used in a shell function; otherwise
    		ignored
      -p	display the attributes and value of each NAME
    
    Options which set attributes:
      -a	to make NAMEs indexed arrays (if supported)
      -A	to make NAMEs associative arrays (if supported)
      -i	to make NAMEs have the `integer' attribute
      -l	to convert NAMEs to lower case on assignment
      -n	make NAME a reference to the variable named by its value
      -r	to make NAMEs readonly
      -t	to make NAMEs have the `trace' attribute
      -u	to convert NAMEs to upper case on assignment
      -x	to make NAMEs export
    
    Using `+' instead of `-' turns off the given attribute.
    
    Variables with the integer attribute have arithmetic evaluation (see
    the `let' command) performed when the variable is assigned a value.
    
    When used in a function, `declare' makes NAMEs local, as with the `local'
    command.  The `-g' option suppresses this behavior.
    
    Exit Status:
    Returns success unless an invalid option is supplied or a variable
    assignment error occurs. Shell commands matching keyword ` Shell commands matching keywords ` Shell options:
 Shift positional parameters.
    
    Rename the positional parameters $N+1,$N+2 ... to $1,$2 ...  If N is
    not given, it is assumed to be 1.
    
    Exit Status:
    Returns success unless N is negative or greater than $#. Signal %d Specify how arguments are to be completed by Readline.
    
    For each NAME, specify how arguments are to be completed.  If no options
    are supplied, existing completion specifications are printed in a way that
    allows them to be reused as input.
    
    Options:
      -p	print existing completion specifications in a reusable format
      -r	remove a completion specification for each NAME, or, if no
    		NAMEs are supplied, all completion specifications
      -D	apply the completions and actions as the default for commands
    		without any specific completion defined
      -E	apply the completions and actions to "empty" commands --
    		completion attempted on a blank line
    
    When completion is attempted, the actions are applied in the order the
    uppercase-letter options are listed above.  The -D option takes
    precedence over -E.
    
    Exit Status:
    Returns success unless an invalid option is supplied or an error occurs. Stopped Stopped (signal) Stopped (tty input) Stopped (tty output) Stopped(%s) Suspend shell execution.
    
    Suspend the execution of this shell until it receives a SIGCONT signal.
    Unless forced, login shells cannot be suspended.
    
    Options:
      -f	force the suspend, even if the shell is a login shell
    
    Exit Status:
    Returns success unless job control is not enabled or an error occurs. TIMEFORMAT: `%c': invalid format character Terminated The mail in %s has been read
 There are running jobs.
 There are stopped jobs.
 There is NO WARRANTY, to the extent permitted by law. These shell commands are defined internally.  Type `help' to see this list.
Type `help name' to find out more about the function `name'.
Use `info bash' to find out more about the shell in general.
Use `man -k' or `info' to find out more about commands not in this list.

A star (*) next to a name means that the command is disabled.

 This is free software; you are free to change and redistribute it. Trap signals and other events.
    
    Defines and activates handlers to be run when the shell receives signals
    or other conditions.
    
    ARG is a command to be read and executed when the shell receives the
    signal(s) SIGNAL_SPEC.  If ARG is absent (and a single SIGNAL_SPEC
    is supplied) or `-', each specified signal is reset to its original
    value.  If ARG is the null string each SIGNAL_SPEC is ignored by the
    shell and by the commands it invokes.
    
    If a SIGNAL_SPEC is EXIT (0) ARG is executed on exit from the shell.  If
    a SIGNAL_SPEC is DEBUG, ARG is executed before every simple command.  If
    a SIGNAL_SPEC is RETURN, ARG is executed each time a shell function or a
    script run by the . or source builtins finishes executing.  A SIGNAL_SPEC
    of ERR means to execute ARG each time a command's failure would cause the
    shell to exit when the -e option is enabled.
    
    If no arguments are supplied, trap prints the list of commands associated
    with each signal.
    
    Options:
      -l	print a list of signal names and their corresponding numbers
      -p	display the trap commands associated with each SIGNAL_SPEC
    
    Each SIGNAL_SPEC is either a signal name in <signal.h> or a signal number.
    Signal names are case insensitive and the SIG prefix is optional.  A
    signal may be sent to the shell with "kill -signal $$".
    
    Exit Status:
    Returns success unless a SIGSPEC is invalid or an invalid option is given. Type `%s -c "help set"' for more information about shell options.
 Type `%s -c help' for more information about shell builtin commands.
 Unknown Signal # Unknown Signal #%d Unknown error Unknown status Unset values and attributes of shell variables and functions.
    
    For each NAME, remove the corresponding variable or function.
    
    Options:
      -f	treat each NAME as a shell function
      -v	treat each NAME as a shell variable
      -n	treat each NAME as a name reference and unset the variable itself
    		rather than the variable it references
    
    Without options, unset first tries to unset a variable, and if that fails,
    tries to unset a function.
    
    Some variables cannot be unset; also see `readonly'.
    
    Exit Status:
    Returns success unless an invalid option is given or a NAME is read-only. Urgent IO condition Usage:	%s [GNU long option] [option] ...
	%s [GNU long option] [option] script-file ...
 Use "%s" to leave the shell.
 Use the `bashbug' command to report bugs.
 User signal 1 User signal 2 Wait for job completion and return exit status.
    
    Waits for each process identified by an ID, which may be a process ID or a
    job specification, and reports its termination status.  If ID is not
    given, waits for all currently active child processes, and the return
    status is zero.  If ID is a a job specification, waits for all processes
    in that job's pipeline.
    
    If the -n option is supplied, waits for the next job to terminate and
    returns its exit status.
    
    Exit Status:
    Returns the status of the last ID; fails if ID is invalid or an invalid
    option is given. Wait for process completion and return exit status.
    
    Waits for each process specified by a PID and reports its termination status.
    If PID is not given, waits for all currently active child processes,
    and the return status is zero.  PID must be a process ID.
    
    Exit Status:
    Returns the status of the last PID; fails if PID is invalid or an invalid
    option is given. Window changed Write arguments to the standard output.
    
    Display the ARGs on the standard output followed by a newline.
    
    Options:
      -n	do not append a newline
    
    Exit Status:
    Returns success unless a write error occurs. Write arguments to the standard output.
    
    Display the ARGs, separated by a single space character and followed by a
    newline, on the standard output.
    
    Options:
      -n	do not append a newline
      -e	enable interpretation of the following backslash escapes
      -E	explicitly suppress interpretation of backslash escapes
    
    `echo' interprets the following backslash-escaped characters:
      \a	alert (bell)
      \b	backspace
      \c	suppress further output
      \e	escape character
      \E	escape character
      \f	form feed
      \n	new line
      \r	carriage return
      \t	horizontal tab
      \v	vertical tab
      \\	backslash
      \0nnn	the character whose ASCII code is NNN (octal).  NNN can be
    		0 to 3 octal digits
      \xHH	the eight-bit character whose value is HH (hexadecimal).  HH
    		can be one or two hex digits
    
    Exit Status:
    Returns success unless a write error occurs. You have mail in $_ You have new mail in $_ [ arg... ] [[ expression ]] `%c': bad command `%c': invalid format character `%c': invalid symbolic mode character `%c': invalid symbolic mode operator `%c': invalid time format specification `%s': cannot unbind `%s': invalid alias name `%s': invalid keymap name `%s': is a special builtin `%s': missing format character `%s': not a pid or valid job spec `%s': not a valid identifier `%s': unknown function name `)' expected `)' expected, found %s `:' expected for conditional expression add_process: pid %5ld (%s) marked as still alive add_process: process %5ld (%s) in the_pipeline alias [-p] [name[=value] ... ] all_local_variables: no function context at current scope argument argument expected array variable support required attempted assignment to non-variable bad array subscript bad command type bad connector bad jump bad substitution: no closing "`" in %s bad substitution: no closing `%s' in %s bash home page: <http://www.gnu.org/software/bash>
 bash_execute_unix_command: cannot find keymap for command bg [job_spec ...] bind [-lpsvPSVX] [-m keymap] [-f filename] [-q name] [-u name] [-r keyseq] [-x keyseq:shell-command] [keyseq:readline-function or readline-command] brace expansion: cannot allocate memory for %s brace expansion: failed to allocate memory for %d elements brace expansion: failed to allocate memory for `%s' break [n] bug: bad expassign token builtin [shell-builtin [arg ...]] caller [expr] can only `return' from a function or sourced script can only be used in a function cannot allocate new file descriptor for bash input from fd %d cannot create temp file for here-document: %s cannot duplicate fd %d to fd %d cannot duplicate named pipe %s as fd %d cannot find %s in shared object %s: %s cannot make child for command substitution cannot make child for process substitution cannot make pipe for command substitution cannot make pipe for process substitution cannot open named pipe %s for reading cannot open named pipe %s for writing cannot open shared object %s: %s cannot redirect standard input from /dev/null: %s cannot reset nodelay mode for fd %d cannot set and unset shell options simultaneously cannot set gid to %d: effective gid %d cannot set terminal process group (%d) cannot set uid to %d: effective uid %d cannot simultaneously unset a function and a variable cannot suspend cannot suspend a login shell cannot use `-f' to make functions cannot use more than one of -anrw case WORD in [PATTERN [| PATTERN]...) COMMANDS ;;]... esac cd [-L|[-P [-e]] [-@]] [dir] child setpgid (%ld to %ld) command [-pVv] command [arg ...] command_substitute: cannot duplicate pipe as fd 1 compgen [-abcdefgjksuv] [-o option] [-A action] [-G globpat] [-W wordlist]  [-F function] [-C command] [-X filterpat] [-P prefix] [-S suffix] [word] complete [-abcdefgjksuv] [-pr] [-DE] [-o option] [-A action] [-G globpat] [-W wordlist]  [-F function] [-C command] [-X filterpat] [-P prefix] [-S suffix] [name ...] completion: function `%s' not found compopt [-o|+o option] [-DE] [name ...] conditional binary operator expected continue [n] coproc [NAME] command [redirections] could not find /tmp, please create! cprintf: `%c': invalid format character current declare [-aAfFgilnrtux] [-p] [name[=value] ...] deleting stopped job %d with process group %ld describe_pid: %ld: no such pid directory stack empty directory stack index dirs [-clpv] [+N] [-N] division by 0 dynamic loading not available echo [-n] [arg ...] echo [-neE] [arg ...] empty array variable name enable [-a] [-dnps] [-f filename] [name ...] error getting terminal attributes: %s error importing function definition for `%s' error setting terminal attributes: %s eval [arg ...] eval: maximum eval nesting level exceeded (%d) exec [-cl] [-a name] [command [arguments ...]] [redirection ...] exit [n] expected `)' exponent less than 0 export [-fn] [name[=value] ...] or export -p expression expected expression recursion level exceeded fc [-e ename] [-lnr] [first] [last] or fc -s [pat=rep] [command] fg [job_spec] file descriptor out of range filename argument required for (( exp1; exp2; exp3 )); do COMMANDS; done for NAME [in WORDS ... ] ; do COMMANDS; done forked pid %d appears in running job %d format parsing problem: %s free: called with already freed block argument free: called with unallocated block argument free: start and end chunk sizes differ free: underflow detected; mh_nbytes out of range function name { COMMANDS ; } or name () { COMMANDS ; } future versions of the shell will force evaluation as an arithmetic substitution getcwd: cannot access parent directories getopts optstring name [arg] hash [-lr] [-p pathname] [-dt] [name ...] hashing disabled help [-dms] [pattern ...] help not available in this version here-document at line %d delimited by end-of-file (wanted `%s') history [-c] [-d offset] [n] or history -anrw [filename] or history -ps arg [arg...] history position history specification hits	command
 identifier expected after pre-increment or pre-decrement if COMMANDS; then COMMANDS; [ elif COMMANDS; then COMMANDS; ]... [ else COMMANDS; ] fi initialize_job_control: getpgrp failed initialize_job_control: line discipline initialize_job_control: setpgid invalid arithmetic base invalid base invalid character %d in exportstr for %s invalid hex number invalid number invalid octal number invalid signal number job %d started without job control job_spec [&] jobs [-lnprs] [jobspec ...] or jobs -x command [args] kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec] last command: %s
 let arg [arg ...] limit line %d:  line editing not enabled load function for %s returns failure (%d): not loaded local [option] name[=value] ... logout
 logout [n] loop count make_here_document: bad instruction type %d make_local_variable: no function context at current scope make_redirection: redirection instruction `%d' out of range malloc: block on free list clobbered malloc: failed assertion: %s
 mapfile [-d delim] [-n count] [-O origin] [-s count] [-t] [-u fd] [-C callback] [-c quantum] [array] maximum here-document count exceeded migrate process to another CPU missing `)' missing `]' missing hex digit for \x missing unicode digit for \%c network operations not supported no `=' in exportstr for %s no closing `%c' in %s no command found no help topics match `%s'.  Try `help help' or `man -k %s' or `info %s'. no job control no job control in this shell no match: %s no other directory no other options allowed with `-x' not currently executing completion function not login shell: use `exit' octal number only meaningful in a `for', `while', or `until' loop pipe error pop_scope: head of shell_variables not a temporary environment scope pop_var_context: head of shell_variables not a function context pop_var_context: no global_variables context popd [-n] [+N | -N] power failure imminent print_command: bad connector `%d' printf [-v var] format [arguments] progcomp_insert: %s: NULL COMPSPEC programming error pushd [-n] [+N | -N | dir] pwd [-LP] read [-ers] [-a array] [-d delim] [-i text] [-n nchars] [-N nchars] [-p prompt] [-t timeout] [-u fd] [name ...] read error: %d: %s readarray [-n count] [-O origin] [-s count] [-t] [-u fd] [-C callback] [-c quantum] [array] readonly [-aAf] [name[=value] ...] or readonly -p realloc: called with unallocated block argument realloc: start and end chunk sizes differ realloc: underflow detected; mh_nbytes out of range recursion stack underflow redirection error: cannot duplicate fd register_alloc: %p already in table as allocated?
 register_alloc: alloc table is full with FIND_ALLOC?
 register_free: %p already in table as free?
 restricted return [n] run_pending_traps: bad value in trap_list[%d]: %p run_pending_traps: signal handler is SIG_DFL, resending %d (%s) to myself save_bash_input: buffer already exists for new fd %d select NAME [in WORDS ... ;] do COMMANDS; done set [-abefhkmnptuvxBCHP] [-o option-name] [--] [arg ...] setlocale: %s: cannot change locale (%s) setlocale: %s: cannot change locale (%s): %s setlocale: LC_ALL: cannot change locale (%s) setlocale: LC_ALL: cannot change locale (%s): %s shell level (%d) too high, resetting to 1 shift [n] shift count shopt [-pqsu] [-o] [optname ...] sigprocmask: %d: invalid operation source filename [arguments] start_pipeline: pgrp pipe suspend [-f] syntax error syntax error in conditional expression syntax error in conditional expression: unexpected token `%s' syntax error in expression syntax error near `%s' syntax error near unexpected token `%s' syntax error: `((%s))' syntax error: `;' unexpected syntax error: arithmetic expression required syntax error: invalid arithmetic operator syntax error: operand expected syntax error: unexpected end of file system crash imminent test [expr] time [-p] pipeline too many arguments trap [-lp] [[arg] signal_spec ...] trap_handler: bad signal %d type [-afptP] name [name ...] typeset [-aAfFgilnrtux] [-p] name[=value] ... ulimit [-SHabcdefiklmnpqrstuvxPT] [limit] umask [-p] [-S] [mode] unalias [-a] name [name ...] unexpected EOF while looking for `]]' unexpected EOF while looking for matching `%c' unexpected EOF while looking for matching `)' unexpected argument `%s' to conditional binary operator unexpected argument `%s' to conditional unary operator unexpected argument to conditional binary operator unexpected argument to conditional unary operator unexpected token %d in conditional command unexpected token `%c' in conditional command unexpected token `%s' in conditional command unexpected token `%s', conditional binary operator expected unexpected token `%s', expected `)' unknown unknown command error unset [-f] [-v] [-n] [name ...] until COMMANDS; do COMMANDS; done value too great for base variables - Names and meanings of some shell variables wait [-n] [id ...] wait [pid ...] wait: pid %ld is not a child of this shell wait_for: No record of process %ld wait_for_job: job %d is stopped waitchld: turning on WNOHANG to avoid indefinite block warning:  warning: %s: %s warning: -C option may not work as you expect warning: -F option may not work as you expect while COMMANDS; do COMMANDS; done write error: %s xtrace fd (%d) != fileno xtrace fp (%d) xtrace_set: %d: invalid file descriptor xtrace_set: NULL file pointer { COMMANDS ; } Project-Id-Version: bash 4.4-beta1
Report-Msgid-Bugs-To: 
POT-Creation-Date: 2016-09-10 12:42-0400
PO-Revision-Date: 2015-10-18 07:47+0700
Last-Translator: Tráº§n Ngá»c QuÃ¢n <vnwildman@gmail.com>
Language-Team: Vietnamese <translation-team-vi@lists.sourceforge.net>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Language: vi
Plural-Forms: nplurals=1; plural=0;
X-Generator: Gtranslator 2.91.7
 quÃ¡ thá»i háº¡n Ä‘á»£i dá»¯ liá»‡u nháº­p: tá»± Ä‘á»™ng Ä‘Äƒng xuáº¥t
 	-%s hoáº·c -o tÃ¹y-chá»n
 	-ilrsD hoáº·c -c lá»‡nh hay -O tÃ¹y-chá»n-ngáº¯n		(chá»‰ gá»i)
 
malloc: %s:%d: kháº³ng Ä‘á»‹nh bá»‹ sai
   (wd: %s)  (xuáº¥t ra core)  dÃ²ng  $%s: khÃ´ng thá»ƒ gÃ¡n báº±ng cÃ¡ch nÃ y %c%c: tÃ¹y chá»n khÃ´ng há»£p lá»‡ %d: bá»™ mÃ´ táº£ táº­p tin khÃ´ng há»£p lá»‡: %s %s cÃ³ thá»ƒ Ä‘Æ°á»£c gá»i thÃ´ng qua  %s cÃ³ exportstr null %s lÃ  %s
 %s lÃ  má»™t hÃ m
 %s lÃ  lá»‡nh tÃ­ch há»£p há»‡ vá»
 %s lÃ  tá»« khÃ³a cá»§a há»‡ vá»
 %s lÃ  lá»‡nh tÃ­ch há»£p Ä‘áº·c biá»‡t cá»§a há»‡ vá»
 %s lÃ  bÃ­ danh cá»§a â€œ%sâ€
 %s Ä‘Æ°á»£c bÄƒm (%s)
 %s khÃ´ng Ä‘Æ°á»£c rÃ ng buá»™c vá»›i báº¥t ká»³ phÃ­m nÃ o.
 %s náº±m ngoÃ i pháº¡m vi %s%s%s: %s (tháº» bÃ i lá»—i lÃ  "%s") %s: %s %s: %s náº±m ngoÃ i pháº¡m vi %s: %s: bá»™ thÃ´ng dá»‹ch sai %s: %s: khÃ´ng thá»ƒ má»Ÿ nhÆ° lÃ  Táº¬P-TIN %s: %s: giÃ¡ trá»‹ so sÃ¡nh náº±m ngoÃ i pháº¡m vi %s: %s: sai Ä‘áº·t giÃ¡ trá»‹ cho bá»™ mÃ´ táº£ táº­p tin váº¿t %s: %s: pháº£i sá»­ dá»¥ng chá»‰ sá»‘ phá»¥ khi gÃ¡n máº£ng káº¿t há»£p %s: %s:%d: khÃ´ng thá»ƒ cáº¥p phÃ¡t %lu byte %s: %s:%d: khÃ´ng thá»ƒ cáº¥p phÃ¡t %lu byte (%lu byte Ä‘Æ°á»£c cáº¥p phÃ¡t) %s: LÃ  má»™t thÆ° má»¥c %s: Ä‘áº·c táº£ cÃ´ng viá»‡c chÆ°a rÃµ rÃ ng %s: chuyá»ƒn hÆ°á»›ng chÆ°a rÃµ rÃ ng %s: Ä‘á»‘i sá»‘ pháº£i lÃ  ID tiáº¿n trÃ¬nh hoáº·c cÃ´ng viá»‡c %s: Ä‘áº·c táº£ Ä‘Æ°á»ng dáº«n máº¡ng sai %s: thay tháº¿ sai %s: cáº§n toÃ¡n tá»­ hai ngÃ´i %s: khÃ´ng thá»ƒ cáº¥p phÃ¡t %lu byte %s: khÃ´ng thá»ƒ cáº¥p phÃ¡t %lu byte (%lu byte Ä‘Æ°á»£c cáº¥p phÃ¡t) %s: khÃ´ng thá»ƒ gÃ¡n fd vÃ o biáº¿n %s: khÃ´ng thá»ƒ gÃ¡n danh sÃ¡ch cho bá»™ pháº­n cá»§a máº£ng %s: khÃ´ng thá»ƒ gÃ¡n cho chá»‰ sá»‘ khÃ´ng thuá»™c kiá»ƒu sá»‘ %s: khÃ´ng thá»ƒ chuyá»ƒn Ä‘á»•i máº£ng káº¿t há»£p sang máº£ng chá»‰ sá»‘ %s: khÃ´ng thá»ƒ chuyá»ƒn Ä‘á»•i máº£ng kiá»ƒu chá»‰ sá»‘ sang máº£ng káº¿t há»£p %s: khÃ´ng thá»ƒ táº¡o: %s %s: khÃ´ng thá»ƒ xÃ³a: %s %s: khÃ´ng thá»ƒ há»§y biáº¿n máº£ng báº±ng cÃ¡ch nÃ y %s: khÃ´ng thá»ƒ thá»±c hiá»‡n táº­p tin nhá»‹ phÃ¢n %s: khÃ´ng thá»ƒ thá»±c hiá»‡n táº­p tin nhá»‹ phÃ¢n: %s %s: khÃ´ng thá»ƒ thá»±c thi: %s %s: khÃ´ng thá»ƒ xuáº¥t %s: khÃ´ng thá»ƒ láº¥y giá»›i háº¡n: %s %s: khÃ´ng thá»ƒ sá»­a Ä‘á»•i giá»›i háº¡n: %s %s: khÃ´ng thá»ƒ má»Ÿ táº­p tin táº¡m: %s %s: khÃ´ng thá»ƒ má»Ÿ: %s %s: khÃ´ng thá»ƒ ghi Ä‘Ã¨ lÃªn táº­p tin Ä‘Ã£ cÃ³ %s: khÃ´ng thá»ƒ Ä‘á»c: %s %s: khÃ´ng thá»ƒ há»§y Ä‘áº·t %s: khÃ´ng thá»ƒ há»§y Ä‘áº·t: %s chá»‰ Ä‘á»c %s: tÃªn tham chiáº¿u quáº©n trÃ²n %s: khÃ´ng tÃ¬m tháº¥y lá»‡nh %s: lá»—i láº¥y thÆ° má»¥c hiá»‡n thá»i: %s: %s
 %s: lá»—i biá»ƒu thá»©c
 %s: táº­p tin quÃ¡ lá»›n %s: khÃ´ng tÃ¬m tháº¥y táº­p tin %s: kÃ½ tá»± khÃ¡c khoáº£ng tráº¯ng Ä‘áº§u tiÃªn khÃ´ng pháº£i lÃ  â€œ"â€ %s: báº£ng bÄƒm rá»—ng
 %s: gáº·p lá»—i khi khai triá»ƒn lá»‹ch sá»­ %s: khÃ´ng rÃµ mÃ¡y %s: tÃ¹y chá»n khÃ´ng Ä‘Æ°á»£c phÃ©p -- %c
 %s: inlib bá»‹ lá»—i %s: cáº§n biá»ƒu thá»©c sá»‘ nguyÃªn %s: tÃªn hÃ nh Ä‘á»™ng khÃ´ng há»£p lá»‡ %s: Ä‘á»‘i sá»‘ khÃ´ng há»£p lá»‡ %s: gá»‘c máº£ng khÃ´ng há»£p lá»‡ %s: khÃ³a máº£ng liÃªn káº¿t khÃ´ng há»£p lá»‡ %s: lÆ°á»£ng gá»i ngÆ°á»£c khÃ´ng há»£p lá»‡ %s: Ä‘áº·c táº£ bá»™ mÃ´ táº£ táº­p tin khÃ´ng há»£p lá»‡ %s: triá»ƒn khai giÃ¡n tiáº¿p khÃ´ng há»£p lá»‡ %s: Ä‘á»‘i sá»‘ giá»›i háº¡n khÃ´ng há»£p lá»‡ %s: sai sá»‘ lÆ°á»£ng dÃ²ng %s: tÃ¹y chá»n khÃ´ng há»£p lá»‡ %s: tÃªn tÃ¹y chá»n khÃ´ng há»£p lá»‡ %s: dá»‹ch vá»¥ khÃ´ng há»£p lá»‡ %s: tÃªn tÃ¹y chá»n há»‡ vá» khÃ´ng há»£p lá»‡ %s: sai Ä‘áº·c táº£ tÃ­n hiá»‡u %s: sai Ä‘áº·c táº£ thá»i gian chá» tá»‘i Ä‘a â€œ%sâ€: tÃªn biáº¿n khÃ´ng há»£p lá»‡ %s: tÃªn biáº¿n khÃ´ng há»£p lá»‡ cho má»™t tham chiáº¿u tÃªn %s: lÃ  thÆ° má»¥c %s: cÃ´ng viá»‡c %d Ä‘Ã£ Ä‘ang cháº¡y ná»n %s: cÃ´ng viá»‡c bá»‹ cháº¥m dá»©t %s: dÃ²ng %d:  %s: vÆ°á»£t quÃ¡ má»©c Ä‘á»™ cÃ¡c hÃ m lá»“ng nhau tá»‘i Ä‘a (%d) %s: vÆ°á»£t quÃ¡ má»©c Ä‘á»™ nguá»“n lá»“ng nhau tá»‘i Ä‘a (%d) %s: thiáº¿u dáº¥u hai cháº¥m phÃ¢n cÃ¡ch %s: biáº¿n nameref tá»± tham chiáº¿u lÃ  khÃ´ng Ä‘Æ°á»£c phÃ©p %s: khÃ´ng cÃ³ Ä‘áº·c táº£ tá»± hoÃ n thiá»‡n %s: khÃ´ng cÃ³ Ä‘iá»u khiá»ƒn cÃ´ng viá»‡c %s: khÃ´ng cÃ³ cÃ´ng viá»‡c nhÆ° váº­y %s: khÃ´ng pháº£i hÃ m %s: khÃ´ng pháº£i lÃ  táº­p tin thÆ°á»ng %s: khÃ´ng pháº£i lÃ  lá»‡nh tÃ­ch há»£p trong há»‡ vá» %s: khÃ´ng pháº£i biáº¿n máº£ng %s: khÃ´ng pháº£i lÃ  máº£ng chá»‰ sá»‘ %s khÃ´ng Ä‘Æ°á»£c táº£i Ä‘á»™ng %s: khÃ´ng tÃ¬m tháº¥y %s: cáº§n Ä‘á»‘i sá»‘ thuá»™c kiá»ƒu sá»‘ %s: tÃ¹y chá»n cáº§n má»™t Ä‘á»‘i sá»‘ %s: tÃ¹y chá»n cáº§n Ä‘á»‘i sá»‘ -- %c
 %s: tham sá»‘ null hoáº·c chÆ°a Ä‘Æ°á»£c Ä‘áº·t %s: gÃ¡n máº£ng phá»©c há»£p Ä‘Æ°á»£c trÃ­ch dáº«n Ä‘Ã£ láº¡c háº­u %s: hÃ m chá»‰ Ä‘á»c %s: biáº¿n chá»‰ Ä‘á»c %s: biáº¿n tham chiáº¿u khÃ´ng thá»ƒ lÃ  má»™t máº£ng %s: bá»‹ háº¡n cháº¿ %s: bá»‹ háº¡n cháº¿: khÃ´ng thá»ƒ chuyá»ƒn hÆ°á»›ng káº¿t xuáº¥t %s: bá»‹ háº¡n cháº¿: khÃ´ng thá»ƒ dÃ¹ng â€œ/â€ trong tÃªn lá»‡nh %s: biá»ƒu thá»©c chuá»—i con < 0 %s: cáº§n toÃ¡n tá»­ má»™t ngÃ´i %s: biáº¿n chÆ°a liÃªn káº¿t %s: cÃ¡ch dÃ¹ng:  %s: khÃ´ng thá»ƒ gÃ¡n giÃ¡ trá»‹ cho biáº¿n (( BTHá»¨C )) (xuáº¥t ra core) (wd ngay: %s)
 . Táº¬P-TIN [Äá»I-Sá» â€¦] /dev/(tcp|udp)/host/port khÃ´ng Ä‘Æ°á»£c há»— trá»£ náº¿u khÃ´ng cÃ³ máº¡ng â€œ/tmpâ€ pháº£i lÃ  tÃªn thÆ° má»¥c há»£p lá»‡ <khÃ´ng cÃ³ thÆ° má»¥c hiá»‡n thá»i> CÃ¢u lá»‡nh Há»¦Y Bá»Ž Há»§y bá»â€¦ ThÃªm thÆ° má»¥c vÃ o ngÄƒn xáº¿p.
    
    ThÃªm thÆ° má»¥c vÃ o Ä‘á»‰nh cá»§a ngÄƒn xáº¿p thÆ° má»¥c, hoáº·c xoay ngÄƒn xáº¿p, lÃ m cho
    thÆ° má»¥c má»›i Ä‘áº§u ngÄƒn xáº¿p lÃ  thÆ° má»¥c lÃ m viá»‡c hiá»‡n thá»i. KhÃ´ng cÃ³ Ä‘á»‘i
    sá»‘ thÃ¬ trao Ä‘á»•i hai thÆ° má»¥c Ä‘áº§u.
    
      -n	NgÄƒn chuyá»ƒn Ä‘á»•i bÃ¬nh thÆ°á»ng khi thÃªm thÆ° má»¥c
        	vÃ o ngÄƒn xáº¿p, Ä‘á»ƒ thao tÃ¡c chá»‰ ngÄƒn xáº¿p.
     
      +N	Xoay ngÄƒn xáº¿p Ä‘á»ƒ thÆ° má»¥c thá»© N (Ä‘áº¿m tá»« trÃ¡i danh sÃ¡ch
        	â€œdirsâ€ (báº¯t Ä‘áº§u tá»« sá»‘ khÃ´ng) dá»i lÃªn Ä‘áº§u.
      
      -N	Xoay ngÄƒn xáº¿p Ä‘á»ƒ thÆ° má»¥c thá»© N (Ä‘áº¿m tá»« pháº£i danh sÃ¡ch
        	â€œdirsâ€ (báº¯t Ä‘áº§u tá»« sá»‘ khÃ´ng) dá»i lÃªn Ä‘áº§u.
      
      dir	ThÃªm THMá»¤C vÃ o Ä‘áº§u ngÄƒn xáº¿p thÆ° má»¥c, cho nÃ³ lÃ m thÆ° má»¥c
        	lÃ m viá»‡c hiá»‡n thá»i má»›i.
    
    Lá»‡nh tÃ­ch há»£p â€œdirsâ€ hiá»ƒn thá»‹ ngÄƒn xáº¿p thÆ° má»¥c.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u khÃ´ng Ä‘Æ°a ra Ä‘á»‘i sá»‘ sai, cÅ©ng khÃ´ng sai
    chuyá»ƒn Ä‘á»•i thÆ° má»¥c. ThÃªm thÆ° má»¥c vÃ o trÃªn ngÄƒn xáº¿p thÆ° má»¥c, hoáº·c xoay ngÄƒn xáº¿p, lÃ m cho thÆ° má»¥c
    hiá»‡n thá»i náº±m á»Ÿ trÃªn Ä‘áº§u. Äá»•i vá»‹ trÃ­ hai thÆ° má»¥c trÃªn cÃ¹ng náº¿u
    khÃ´ng cÃ³ Ä‘á»‘i sá»‘.

    TÃ¹y chá»n:
      -n	ngÄƒn thay Ä‘á»•i thÆ° má»¥c bÃ¬nh thÆ°á»ng khi thÃªm, chá»‰ thao tÃ¡c
        	trÃªn ngÄƒn xáº¿p thÆ° má»¥c.

    Äá»‘i sá»‘:
      +N	xoay ngÄƒn xáº¿p Ä‘á»ƒ thÆ° má»¥c thá»© N (Ä‘áº¿m tá»« bÃªn trÃ¡i â€œdirsâ€, báº¯t
        	Ä‘áº§u tá»« sá»‘ khÃ´ng) náº±m á»Ÿ Ä‘áº§u.

      -N	xoay ngÄƒn xáº¿p Ä‘á»ƒ thÆ° má»¥c thá»© N (Ä‘áº¿m tá»« bÃªn pháº£i â€œdirsâ€, báº¯t
        	Ä‘áº§u tá»« sá»‘ khÃ´ng) náº±m á»Ÿ Ä‘áº§u.

      THÆ¯-Má»¤C	thÃªm THÆ¯-Má»¤C vÃ o Ä‘áº§u ngÄƒn xáº¿p thÆ° má»¥c vÃ  dÃ¹ng lÃ m thÆ° má»¥c
        	lÃ m viá»‡c hiá»‡n thá»i.

    Lá»‡nh â€œdirsâ€ hiá»ƒn thá»‹ ngÄƒn xáº¿p thÆ° má»¥c. BÃ¡o Ä‘á»™ng (há»“ sÆ¡) BÃ¡o Ä‘á»™ng (áº£o) Äá»“ng há»“ bÃ¡o thá»©c Sá»‘ há»c cho vÃ²ng láº·p.

    TÆ°Æ¡ng Ä‘Æ°Æ¡ng vá»›i:
    	(( BTHá»¨C1 ))
    	while (( BTHá»¨C2 )); do
    		CÃC;CÃ‚U;Lá»†NH;
    		(( BTHá»¨C3 ))
    	done
    BTHá»¨C1, BTHá»¨C2 vÃ  BTHá»¨C3 lÃ  biá»ƒu thá»©c sá»‘ há»c. Ngáº§m Ä‘á»‹nh 1 cho báº¥t
    kÃ¬ biá»ƒu thá»©c bá» trá»‘ng nÃ o.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i tráº¡ng thÃ¡i cá»§a cÃ¢u lá»‡nh cuá»‘i cÃ¹ng Ä‘Æ°á»£c cháº¡y. Theo váº¿t/Ä‘áº·t báº«y BPT Lá»—i lá»‡nh gá»i há»‡ thá»‘ng TÃ­n hiá»‡u giáº£ á»ng dáº«n há»ng Lá»—i bus Giá»›i háº¡n CPU Äá»•i thÆ° má»¥c lÃ m viá»‡c cá»§a há»‡ vá».
    
    Chuyá»ƒn Ä‘á»•i thÆ° má»¥c hiá»‡n thá»i sang THÆ¯-Má»¤C. ThÆ° má»¥c máº·c Ä‘á»‹nh lÃ  giÃ¡
    trá»‹ cá»§a biáº¿n HOME.
    
    Biáº¿n CDPATH Ä‘á»‹nh nghÄ©a Ä‘Æ°á»ng dáº«n tÃ¬m kiáº¿m cho thÆ° má»¥c chá»©a
    THÆ¯-Má»¤C. TÃªn thÆ° má»¥c thay tháº¿ trong CDPATH Ä‘Æ°á»£c phÃ¢n cÃ¡ch báº±ng dáº¥u hai cháº¥m
    (:).  TÃªn thÆ° má»¥c trá»‘ng tÆ°Æ¡ng Ä‘Æ°Æ¡ng vá»›i thÆ° má»¥c hiá»‡n táº¡i. Náº¿u
    THÆ¯-Má»¤C báº¯t Ä‘áº§u vá»›i dáº¥u gáº¡ch chÃ©o (/) thÃ¬ khÃ´ng dÃ¹ng CDPATH.
    
    Náº¿u khÃ´ng tÃ¬m tháº¥y thÆ° má»¥c, vÃ  biáº¿n â€œcdable_varsâ€ Ä‘Æ°á»£c Ä‘áº·t,
    thÃ¬ lá»‡nh sáº½ coi lÃ  má»™t tÃªn biáº¿n. Náº¿u biáº¿n Ä‘Ã³ cÃ³ giÃ¡ trá»‹,
    thÃ¬ giÃ¡ trá»‹ nÃ y Ä‘Æ°á»£c dÃ¹ng cho THÆ¯-Má»¤C.
    
    TÃ¹y chá»n:
        -L  buá»™c theo liÃªn káº¿t má»m: phÃ¢n giáº£i liÃªn káº¿t má»m
           	TH.Má»¤C sau khi xá»­ lÃ½ â€œ..â€
        -P  dÃ¹ng cáº¥u trÃºc thÆ° má»¥c váº­t lÃ½ mÃ  khÃ´ng theo liÃªn káº¿t má»m:
           	phÃ¢n giáº£i liÃªn káº¿t má»m TH.Má»¤C sau khi xá»­ lÃ½ â€œ..â€
        -e  náº¿u cÃ³ tÃ¹y chá»n -P vÃ  khÃ´ng thá»ƒ xÃ¡c Ä‘á»‹nh thÆ° má»¥c lÃ m viá»‡c
          	hiá»‡n táº¡i thÃ¬ thoÃ¡t vá»›i tráº¡ng thÃ¡i khÃ¡c khÃ´ng
        -@  trÃªn cÃ¡c há»‡ thá»‘ng mÃ  há»— trá»£ nÃ³, hiá»‡n diá»‡n má»™t táº­p tin vá»›i cÃ¡c
           thuá»™c tÃ­nh má»Ÿ rá»™ng nhÆ° lÃ  má»™t thÆ° má»¥c chá»©a cÃ¡c thuá»™c tÃ­nh táº­p tin
    
    Máº·c Ä‘á»‹nh lÃ  theo liÃªn káº¿t má»m, nhÆ° cÃ³ máº·t tÃ¹y chá»n â€œ-Lâ€.
    â€œ..â€ Ä‘Æ°á»£c xá»­ lÃ½ báº±ng cÃ¡ch gá»¡ bá» pháº§n trÆ°á»›c cá»§a Ä‘Æ°á»ng dáº«n
    cho Ä‘áº¿n dáº¥u gáº¡ch chÃ©o hay Ä‘iá»ƒm báº¯t Ä‘áº§u cá»§a TH.Má»¤C.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ vá» 0 náº¿u thay Ä‘á»•i thÆ° má»¥c, vÃ  náº¿u $PWD Ä‘Æ°á»£c Ä‘áº·t thÃ nh cÃ´ng khi
    -P Ä‘Æ°á»£c sá»­ dá»¥ng; khÃ´ng thÃ¬ khÃ¡c khÃ´ng. Tiáº¿n trÃ¬nh con Ä‘Ã£ giáº¿t hoáº·c dá»«ng TÃªn vÃ  cÃ¡ch dÃ¹ng cÃ¡c biáº¿n há»‡ vá» thÆ°á»ng dÃ¹ng.

    BASH_VERSION
        	ThÃ´ng tin phiÃªn báº£n cá»§a Bash Ä‘ang cháº¡y.
    CDPATH	Danh sÃ¡ch thÆ° má»¥c cÃ¡ch nhau báº±ng dáº¥u hai cháº¥m Ä‘á»ƒ tÃ¬m
        	Ä‘á»‘i sá»‘ thÆ° má»¥c trong lá»‡nh â€œcdâ€.
    GLOBIGNORE	Danh sÃ¡ch máº«u cÃ¡ch nhau báº±ng dáº¥u hai cháº¥m diá»…n táº£
        	tÃªn táº­p tin bá»‹ bá» qua khÃ´ng bung Ä‘Æ°á»ng dáº«n.
    HISTFILE	TÃªn táº­p tin chá»©a lá»‹ch sá»­ cÃ¢u lá»‡nh cá»§a báº¡n.
    HISTFILESIZE
        	Sá»‘ dÃ²ng tá»‘i Ä‘a táº­p tin nÃ y cÃ³ thá»ƒ chá»©a.
    HISTSIZE	Sá»‘ dÃ²ng tá»‘i Ä‘a mÃ  há»‡ vá» Ä‘ang cháº¡y cÃ³ thá»ƒ truy cáº­p.
    HOME	TÃªn Ä‘Æ°á»ng dáº«n Ä‘áº§y Ä‘á»§ cá»§a thÆ° má»¥c Ä‘Äƒng nháº­p cá»§a báº¡n.
    HOSTNAME	TÃªn cá»§a mÃ¡y hiá»‡n thá»i cá»§a báº¡n.
    HOSTTYPE	Loáº¡i CPU phiÃªn báº£n Bash nÃ y Ä‘ang cháº¡y.
    IGNOREEOF	Äiá»u khiá»ƒn hÃ nh vi há»‡ vá» khi nháº­n EOF lÃ  dá»¯ liá»‡u nháº­p
        	duy nháº¥t. Äáº·t thÃ¬ giÃ¡ trá»‹ cá»§a nÃ³ lÃ  EOF cÃ³ thá»ƒ gáº·p
        	liÃªn tá»¥c trÃªn má»™t dÃ²ng rá»—ng trÆ°á»›c khi há»‡ vá» káº¿t thÃºc
        	(máº·c Ä‘á»‹nh lÃ  10). KhÃ´ng Ä‘áº·t thÃ¬ EOF nghÄ©a lÃ  káº¿t thÃºc
        	nháº­p.
    MACHTYPE	Chuá»—i mÃ´ táº£ há»‡ thá»‘ng Bash Ä‘ang cháº¡y.
    MAILCHECK	Sá»‘ giÃ¢y giá»¯a hai láº§n Bash kiá»ƒm tra cÃ³ thÆ° má»›i khÃ´ng.
    MAILPATH	Danh sÃ¡ch tÃªn táº­p tin cÃ¡ch nhau báº±ng dáº¥u hai cháº¥m
        	Ä‘á»ƒ Bash kiá»ƒm tra cÃ³ thÆ° má»›i khÃ´ng.
    OSTYPE	PhiÃªn báº£n UNIX Bash Ä‘ang cháº¡y.
    PATH	Danh sÃ¡ch thÆ° má»¥c cÃ¡ch nhau báº±ng dáº¥u hai cháº¥m Ä‘á»ƒ tÃ¬m lá»‡nh.
    PROMPT_COMMAND
        	Lá»‡nh cáº§n thá»±c hiá»‡n trÆ°á»›c khi in dáº¥u nháº¯c chÃ­nh.
    PS1		Chuá»—i dáº¥u nháº¯c chÃ­nh.
    PS2		Chuá»—i dáº¥u nháº¯c phá»¥.
    PWD		TÃªn Ä‘Æ°á»ng dáº«n Ä‘áº§y Ä‘á»§ cá»§a thÆ° má»¥c hiá»‡n táº¡i.
    SHELLOPTS	Danh sÃ¡ch tÃ¹y chá»n há»‡ vá» Ä‘Æ°á»£c báº­t cÃ¡ch nhau báº±ng
        	dáº¥u hai cháº¥m.
    TERM	TÃªn kiá»ƒu thiáº¿t bá»‹ cuá»‘i hiá»‡n thá»i.
    TIMEFORMAT	Äá»‹nh dáº¡ng káº¿t xuáº¥t cho thá»‘ng kÃª thá»i gian cá»§a lá»‡nh â€œtimeâ€.
    auto_resume	GiÃ¡ trá»‹ khÃ¡c rá»—ng thÃ¬ trÆ°á»›c tiÃªn tÃ¬m má»™t tá»« lá»‡nh xuáº¥t
        	hiá»‡n má»™t mÃ¬nh trÃªn má»™t dÃ²ng, trong danh sÃ¡ch cÃ¡c cÃ´ng
        	viá»‡c bá»‹ dá»«ng cháº¡y. TÃ¬m ra thÃ¬ Ä‘áº·t cÃ´ng viá»‡c Ä‘Ã³ vÃ o ná»n
        	trÆ°á»›c. GiÃ¡ trá»‹ â€œexactâ€ cÃ³ nghÄ©a lÃ  tá»« lá»‡nh pháº£i tÆ°Æ¡ng
        	á»©ng chÃ­nh xÃ¡c vá»›i má»™t cÃ¢u lá»‡nh trong danh sÃ¡ch cÃ¡c
        	cÃ´ng viá»‡c bá»‹ dá»«ng cháº¡y. GiÃ¡ trá»‹ â€œsubstringâ€ cÃ³ nghÄ©a
        	lÃ  tá»« lá»‡nh pháº£i tÆ°Æ¡ng á»©ng vá»›i má»™t chuá»—i phá»¥ cá»§a cÃ´ng
        	viá»‡c Ä‘Ã³.
    histchars	CÃ¡c kÃ½ tá»± Ä‘iá»u khiá»ƒn bung vÃ  thay tháº¿ lá»‹ch sá»­. KÃ½ tá»±
        	Ä‘áº§u tiÃªn thÆ°á»ng lÃ  kÃ½ tá»± thay tháº¿ lá»‹ch sá»­, thÆ°á»ng lÃ 
        	â€œ!â€. KÃ½ tá»± thá»© hai lÃ  kÃ½ tá»± thay tháº¿ nhanh, thÆ°á»ng lÃ 
        	â€œ^â€. KÃ½ tá»± thá»© ba lÃ  kÃ½ tá»± ghi chÃº vá» lá»‹ch sá»­, thÆ°á»ng
        	lÃ  â€œ#â€.
    HISTIGNORE	Danh sÃ¡ch máº«u cÃ¡ch báº±ng dáº¥u hai cháº¥m dÃ¹ng Ä‘á»ƒ quyáº¿t Ä‘á»‹nh
        	nhá»¯ng cÃ¢u lá»‡nh nÃ o nÃªn Ä‘Æ°á»£c lÆ°u vÃ o danh sÃ¡ch lá»‹ch sá»­.
 Tiáº¿p tá»¥c Äá»‹nh nghÄ©a biáº¿n cá»¥c bá»™.
    
    Táº¡o biáº¿n cá»¥c bá»™ tÃªn TÃŠN vÃ  gÃ¡n GIÃ-TRá»Š cho nÃ³. TÃ™Y_CHá»ŒN cÃ³ thá»ƒ lÃ 
    báº¥t cá»© tÃ¹y chá»n nÃ o â€œdeclareâ€ cháº¥p nháº­n.
    
    Biáº¿n cá»¥c bá»™ chá»‰ dÃ¹ng Ä‘Æ°á»£c bÃªn trong hÃ m, chá»‰ truy cáº­p Ä‘Æ°á»£c tá»« hÃ m
    mÃ  biáº¿n Ä‘Æ°á»£c Ä‘á»‹nh nghÄ©a vÃ  cÃ¡c hÃ m con.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng trá»« khi Ä‘Æ°a ra tÃ¹y chá»n sai hay gáº·p lá»—i,
    hoáº·c náº¿u há»‡ vá» khÃ´ng cháº¡y hÃ m. Äá»‹nh nghÄ©a hoáº·c hiá»ƒn thá»‹ bÃ­ danh.

    KhÃ´ng Ä‘Æ°a ra Ä‘á»‘i sá»‘ thÃ¬ â€œaliasâ€ in danh sÃ¡ch cÃ¡c bÃ­ danh á»Ÿ dáº¡ng dÃ¹ng láº¡i Ä‘Æ°á»£c
    â€œalias TÃŠN=GIÃ-TRá»Šâ€ trÃªn Ä‘áº§u ra chuáº©n.

    Náº¿u khÃ´ng thÃ¬ má»™t bÃ­ danh Ä‘Æ°á»£c Ä‘á»‹nh nghÄ©a cho má»—i TÃŠN theo giÃ¡ trá»‹
    Ä‘Æ°a ra. Khoáº£ng tráº¯ng á»Ÿ Ä‘Ã¢u trong GIÃ-TRá»Š lÃ m kiá»ƒm tra thay tháº¿ bÃ­
    danh cho tá»« káº¿ tiáº¿p, khi phÃ¢n giáº£i bÃ­ danh.
    
    TÃ¹y chá»n:
      -p	in táº¥t cáº£ cÃ¡c bÃ­ danh Ä‘Æ°á»£c Ä‘á»‹nh nghÄ©a theo Ä‘á»‹nh dáº¡ng
        	cÃ³ thá»ƒ dÃ¹ng láº¡i Ä‘Æ°á»£c
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    alias tráº£ láº¡i thÃ nh cÃ´ng trá»« khi TÃŠN Ä‘Ã£ cho khÃ´ng pháº£i lÃ 
    má»™t bÃ­ danh Ä‘Ã£ Ä‘Æ°á»£c Ä‘á»‹nh nghÄ©a Äá»‹nh nghÄ©a hÃ m há»‡ vá».

    Táº¡o hÃ m há»‡ vá» tÃªn TÃŠN. Khi Ä‘Æ°á»£c gá»i dÆ°á»›i dáº¡ng má»™t cÃ¢u lá»‡nh Ä‘Æ¡n
    giáº£n, TÃŠN cháº¡y Lá»†NH trong ngá»¯ cáº£nh cá»§a há»‡ vá» gá»i. Khi TÃŠN Ä‘Æ°á»£c
    gá»i, cÃ¡c Ä‘á»‘i sá»‘ Ä‘Æ°á»£c gá»­i cho hÃ m dáº¡ng $1â€¦$n, vÃ  tÃªn hÃ m náº±m
    trong $FUNCNAME.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u TÃŠN khÃ´ng pháº£i chá»‰ Ä‘á»c. Hiá»ƒn thá»‹ ngÄƒn xáº¿p thÆ° má»¥c.
    
    Hiá»ƒn thá»‹ danh sÃ¡ch cÃ¡c thÆ° má»¥c Ä‘Æ°á»£c nhá»› hiá»‡n thá»i. CÃ¡c thÆ° má»¥c
    tÃ¬m tháº¥y chá»— cá»§a chÃºng trong danh sÃ¡ch vá»›i lá»‡nh â€œpushdâ€;
    báº¡n cÃ³ thá»ƒ láº¥y báº£n sao dá»± phÃ²ng thÃ´ng qua danh sÃ¡ch vá»›i lá»‡nh â€œpopdâ€.
    
    TÃ¹y chá»n:
      -c	xÃ³a má»i pháº§n tá»­ trong ngÄƒn xáº¿p thÆ° má»¥c
      -l	Ä‘á»«ng in phiÃªn báº£n thÆ° má»¥c cÃ³ dáº¥u ngÃ£
        	(tÆ°Æ¡ng Ä‘á»‘i so vá»›i thÆ° má»¥c chÃ­nh cá»§a ngÆ°á»i dÃ¹ng)
      -p	in ngÄƒn xáº¿p thÆ° má»¥c, má»—i dÃ²ng má»™t má»¥c
      -v	in ngÄƒn xáº¿p thÆ° má»¥c, má»—i dÃ²ng má»™t má»¥c kÃ¨m vá»‹ trÃ­ trong ngÄƒn xáº¿p
    
    Äá»‘i sá»‘:
      +N	hiá»ƒn thá»‹ má»¥c thá»© N báº¯t Ä‘áº§u tá»« bÃªn trÃ¡i danh sÃ¡ch
                Ä‘Æ°á»£c hiá»ƒn thá»‹ báº±ng â€œdirsâ€ khi Ä‘Æ°á»£c gá»i mÃ  khÃ´ng Ä‘Æ°a ra
                tÃ¹y chá»n, báº¯t Ä‘áº§u tá»« sá»‘ khÃ´ng.
    
      -N	hiá»ƒn thá»‹ má»¥c thá»© N báº¯t Ä‘áº§u tá»« bÃªn pháº£i danh sÃ¡ch
                Ä‘Æ°á»£c hiá»ƒn thá»‹ báº±ng â€œdirsâ€ khi Ä‘Æ°á»£c gá»i mÃ  khÃ´ng Ä‘Æ°a ra
                tÃ¹y chá»n, báº¯t Ä‘áº§u tá»« sá»‘ khÃ´ng.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ vá» thÃ nh cÃ´ng náº¿u khÃ´ng Ä‘Æ°a ra tÃ¹y chá»n sai hay gáº·p lá»—i. Hiá»ƒn thá»‹ thÃ´ng tin vá» lá»‡nh tÃ­ch há»£p.
    
    Hiá»ƒn thá»‹ báº£n tÃ³m táº¯t ngáº¯n vá» cÃ¡c cÃ¢u lá»‡nh tÃ­ch há»£p.  Náº¿u chá»‰ Ä‘á»‹nh
    MáºªU thÃ¬ in ra trá»£ giÃºp chi tiáº¿t vá» táº¥t cáº£ cÃ¡c cÃ¢u lá»‡nh tÆ°Æ¡ng
    á»©ng vá»›i máº«u Ä‘Ã³; khÃ´ng thÃ¬ in ra danh sÃ¡ch cÃ¡c chá»§ Ä‘á» trá»£ giÃºp.
    
    TÃ¹y chá»n:
      -d	xuáº¥t mÃ´ táº£ ngáº¯n vá» má»—i chá»§ Ä‘á»
      -m	hiá»‡n cÃ¡ch dÃ¹ng theo Ä‘á»‹nh dáº¡ng trang hÆ°á»›ng dáº«n (man)
      -s	xuáº¥t chá»‰ má»™t báº£n tÃ³m táº¯t cÃ¡ch dÃ¹ng cho má»—i
        		chá»§ Ä‘á» tÆ°Æ¡ng á»©ng vá»›i MáºªU
    
    Äá»‘i sá»‘:
      MáºªU	máº«u xÃ¡c Ä‘á»‹nh má»™t chá»§ Ä‘á» trá»£ giÃºp
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u tÃ¬m Ä‘Æ°á»£c MáºªU vÃ  khÃ´ng Ä‘Æ°a ra tÃ¹y chá»n sai. Hiá»ƒn thá»‹ thÃ´ng tin vá» kiá»ƒu cÃ¢u lá»‡nh.
    
    Äá»‘i vá»›i má»—i TÃŠN, chá»‰ ra cÃ¡ch thÃ´ng dá»‹ch lá»‡nh khi Ä‘Æ°á»£c thá»±c thi
    theo tÃªn lá»‡nh.
    
    TÃ¹y chá»n:
      -a	hiá»ƒn thá»‹ má»i vá»‹ trÃ­ chá»©a táº­p tin thá»±c thi Ä‘Æ°á»£c cÃ³ TÃŠN;
        	khÃ´ng Ä‘áº·t tÃ¹y chá»n â€œ-pâ€ thÃ¬ bao gá»“m cÃ¡c bÃ­ danh, lá»‡nh
        	tÃ­ch há»£p vÃ  hÃ m.
      -f	ngÄƒn tra cá»©u hÃ m há»‡ vá»
      -P	buá»™c tÃ¬m kiáº¿m PATH Ä‘á»‘i vá»›i má»—i TÃŠN, tháº­m chÃ­ náº¿u nÃ³ lÃ 
        	bÃ­ danh, lá»‡nh tÃ­ch há»£p hay hÃ m, vÃ  tráº£ láº¡i tÃªn cá»§a táº­p
        	tin trÃªn Ä‘Ä©a mÃ  sáº½ Ä‘Æ°á»£c thá»±c thi
      -p	tráº£ vá» hoáº·c tÃªn cá»§a táº­p tin trÃªn Ä‘Ä©a mÃ  sáº½ Ä‘Æ°á»£c thá»±c
    		thi, hoáº·c gÃ¬ cáº£ â€œtype -t TÃŠNâ€ sáº½ khÃ´ng tráº£ vá» â€œfileâ€
    		(táº­p tin).
      -t	xuáº¥t má»™t trong nhá»¯ng tá»« Ä‘Æ¡n â€œaliasâ€, â€œkeywordâ€, â€œfunctionâ€,
        	â€œbuiltinâ€, â€œfileâ€ hoáº·c â€œâ€, náº¿u TÃŠN tÆ°Æ¡ng á»©ng lÃ  bÃ­ danh,
        	tá»« khÃ³a,hÃ m, lá»‡nh há»‡ vá» tÃ­ch há»£p, táº­p tin
        	trÃªn Ä‘Ä©a, hoáº·c khÃ´ng tÃ¬m tháº¥y.
    
    Äá»‘i sá»‘:
      TÃŠN	tÃªn cÃ¢u lá»‡nh cáº§n giáº£i thÃ­ch.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u tÃ¬m tháº¥y táº¥t cáº£ cÃ¡c TÃŠN; bá»‹ lá»—i náº¿u khÃ´ng tÃ¬m tháº¥y. Hiá»ƒn thá»‹ hoáº·c thá»±c thi lá»‡nh tá»« lá»‹ch sá»­.

    fc Ä‘Æ°á»£c dÃ¹ng Ä‘á»ƒ liá»‡t kÃª, chá»‰nh sá»­a vÃ  thá»±c thi láº¡i lá»‡nh tá»« danh
    sÃ¡ch lá»‹ch sá»­. Äáº¦U vÃ  CUá»I cÃ³ thá»ƒ lÃ  sá»‘ xÃ¡c Ä‘á»‹nh pháº¡m vi, hoáº·c Äáº¦U
    cÃ³ thá»ƒ lÃ  chuá»—i chá»©a pháº§n Ä‘áº§u lá»‡nh cháº¡y gáº§n Ä‘Ã¢y nháº¥t.

    TÃ¹y chá»n:
      -e ENAME	chá»n trÃ¬nh soáº¡n tháº£o nÃ o cáº§n dÃ¹ng.
        	Máº·c Ä‘á»‹nh lÃ  FCEDIT, sau Ä‘Ã³ lÃ  EDITOR, rá»“i Ä‘áº¿n vi
      -l	liá»‡t kÃª thay vÃ¬ chá»‰nh sá»­a
      -n	liá»‡t kÃª khÃ´ng in sá»‘ thá»© tá»± dÃ²ng
      -r	Ä‘áº£o ngÆ°á»£c thá»© tá»± cÃ¡c dÃ²ng (má»›i nháº¥t trÆ°á»›c)

    Äá»‹nh dáº¡ng â€œfc -s [máº«u=láº§n_láº­p_láº¡i â€¦] [lá»‡nh]â€ Ä‘Æ°á»£c dÃ¹ng Ä‘á»ƒ cháº¡y
    láº¡i lá»‡nh sau khi thay tháº¿ CÅ¨=Má»šI.

    Má»™t bÃ­ danh há»¯u Ã­ch lÃ  r=".c -s" Ä‘á»ƒ cÃ³ thá»ƒ gÃµ â€œr ccâ€ Ä‘á»ƒ cháº¡y lá»‡nh
    cuá»‘i cÃ¹ng báº¯t Ä‘áº§u báº±ng â€œccâ€ vÃ  gÃµ â€œrâ€ Ä‘á»ƒ cháº¡y láº¡i lá»‡nh cuá»‘i.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng hay tráº¡ng thÃ¡i cá»§a cÃ¢u lá»‡nh Ä‘Æ°á»£c thá»±c thi; gáº·p
    lá»—i thÃ¬ khÃ¡c sá»‘ khÃ´ng. Hiá»ƒn thá»‹ hoáº·c Ä‘áº·t máº·t náº¡ cháº¿ Ä‘á»™ táº­p tin.

    Äáº·t máº·t náº¡ táº¡o táº­p tin cá»§a ngÆ°á»i dÃ¹ng thÃ nh CHáº¾_Äá»˜. KhÃ´ng tham sá»‘
    thÃ¬ in cháº¿ Ä‘á»™ hiá»‡n thá»i.

    Náº¿u CHáº¾_Äá»˜ báº¯t Ä‘áº§u báº±ng chá»¯ sá»‘ thÃ¬ hiá»ƒu lÃ  sá»‘ bÃ¡t phÃ¢n; khÃ´ng thÃ¬
    nÃ³ lÃ  chuá»—i cháº¿ Ä‘á»™ kÃ½ hiá»‡u Ä‘Æ°á»£c chmod(1) cháº¥p nháº­n.

    TÃ¹y chá»n:
      -p	khÃ´ng cÃ³ CHáº¾_Äá»˜ thÃ¬ xuáº¥t theo Ä‘á»‹nh dáº¡ng dÃ¹ng láº¡i
        	lÃ m dá»¯ liá»‡u Ä‘áº§u vÃ o
      -S	in káº¿t xuáº¥t kÃ½ hiá»‡u thay vÃ¬ bÃ¡t phÃ¢n

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u khÃ´ng cÃ³ CHáº¾_Äá»˜ sai hay tÃ¹y chá»n sai. Hiá»ƒn thá»‹ tá»« gá»£i Ã½ cÃ³ thá»ƒ phá»¥ thuá»™c vÃ o cÃ¡c tÃ¹y chá»n.
    
    Dá»± Ä‘á»‹nh dÃ¹ng tá»« bÃªn trong má»™t chá»©c nÄƒng há»‡ vá» mÃ  táº¡o cÃ¡c viá»‡c
    tá»± hoÃ n thiá»‡n cÃ³ thá»ƒ lÃ m. Náº¿u Ä‘Æ°a ra Ä‘á»‘i sá»‘ Tá»ª váº«n tÃ¹y chá»n, thÃ¬ táº¡o
    cÃ¡c káº¿t quáº£ tÆ°Æ¡ng á»©ng vá»›i Tá»ª.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u khÃ´ng Ä‘Æ°a ra tÃ¹y chá»n sai hay gáº·p lá»—i. Hiá»ƒn thá»‹ thá»i lÆ°á»£ng cháº¡y tiáº¿n trÃ¬nh.

    In thá»i lÆ°á»£ng cháº¡y á»Ÿ má»©c ngÆ°á»i dÃ¹ng vÃ  há»‡ thá»‘ng cá»§a há»‡ vá» vÃ  cÃ¡c
    tiáº¿n trÃ¬nh con.

    Tráº¡ng thÃ¡i thoÃ¡t:
    LÃºc nÃ o cÅ©ng thÃ nh cÃ´ng. Hiá»ƒn thá»‹ tráº¡ng thÃ¡i cá»§a cÃ´ng viá»‡c.
    
    Liá»‡t kÃª cÃ¡c cÃ´ng viá»‡c Ä‘ang cháº¡y. Äáº·c táº£ cÃ´ng viá»‡c ÄTCV háº¡n cháº¿ chá»‰
    hiá»‡n cÃ´ng viá»‡c Ä‘Ã³ thÃ´i. KhÃ´ng cÃ³ tÃ¹y chá»n thÃ¬ hiá»ƒn thá»‹ tráº¡ng thÃ¡i
    cá»§a má»i cÃ´ng viá»‡c Ä‘ang cháº¡y.
    
    TÃ¹y chá»n:
      -l	liá»‡t kÃª mÃ£ sá»‘ tiáº¿n trÃ¬nh ngoÃ i thÃ´ng tin bÃ¬nh thÆ°á»ng
      -n	liá»‡t kÃª chá»‰ nhá»¯ng tiáº¿n trÃ¬nh Ä‘Ã£ thay Ä‘á»•i tráº¡ng thÃ¡i
        	ká»ƒ tá»« láº§n thÃ´ng bÃ¡o cuá»‘i cÃ¹ng
      -s	chá»‰ hiá»‡n nhá»¯ng cÃ´ng viá»‡c Ä‘ang dá»«ng cháº¡y
    
    Náº¿u cÃ³ â€œ-xâ€ thÃ¬ cháº¡y Lá»†NH sau khi thay tháº¿ táº¥t cáº£ Ä‘áº·c táº£ cÃ´ng viá»‡c
    trÃªn Ä‘á»‘i sá»‘ báº±ng mÃ£ tiáº¿n trÃ¬nh cá»§a trÃ¬nh dáº«n Ä‘áº§u nhÃ³m tiáº¿n trÃ¬nh
    cá»§a cÃ´ng viá»‡c Ä‘Ã³.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u khÃ´ng gáº·p tÃ¹y chá»n sai hay gáº·p lá»—i.
    ÄÆ°a ra â€œ-xâ€ thÃ¬ tráº£ láº¡i tráº¡ng thÃ¡i thoÃ¡t cá»§a Lá»†NH. Hiá»ƒn thá»‹ danh sÃ¡ch cÃ¡c thÆ° má»¥c Ä‘Æ°á»£c nhá»› hiá»‡n thá»i. Lá»‡nh â€œpushdâ€ thÃªm
    thÆ° má»¥c vÃ o danh sÃ¡ch nÃ y. â€œpopdâ€ láº¥y thÆ° má»¥c khá»i danh sÃ¡ch.

    TÃ¹y chá»n:
      -c	xÃ³a má»i pháº§n tá»­ trong ngÄƒn xáº¿p thÆ° má»¥c
      -l	khÃ´ng in phiÃªn báº£n thÆ° má»¥c cÃ³ dáº¥u ngÃ£ náº±m trÆ°á»›c
        	mÃ  tÆ°Æ¡ng á»©ng vá»›i thÆ° má»¥c chÃ­nh cá»§a ngÆ°á»i dÃ¹ng
      -p	in ngÄƒn xáº¿p thÆ° má»¥c má»—i dÃ²ng má»™t má»¥c
      -v	in ngÄƒn xáº¿p thÆ° má»¥c má»—i dÃ²ng má»™t má»¥c kÃ¨m vá»‹ trÃ­ trong ngÄƒn xáº¿p

    Äá»‘i sá»‘:
      +N	hiá»ƒn thá»‹ má»¥c thá»© N Ä‘áº¿m tá»« bÃªn trÃ¡i khi gá»i khÃ´ng tÃ¹y chá»n,
                báº¯t Ä‘áº§u tá»« sá»‘ khÃ´ng.

      -N	hiá»ƒn thá»‹ má»¥c thá»© N Ä‘áº¿m tá»« bÃªn pháº£i khi gá»i khÃ´ng tÃ¹y chá»n,
                báº¯t Ä‘áº§u tá»« sá»‘ khÃ´ng. Xong Xong(%d) CÃ¢u lá»‡nh EMT Báº­t vÃ  táº¯t lá»‡nh há»‡ vá» tÃ­ch há»£p.

    Báº­t vÃ  táº¯t cÃ¡c lá»‡nh há»‡ vá» tÃ­ch há»£p. Chá»©c nÄƒng táº¯t cho phÃ©p báº¡n
    cháº¡y má»™t lá»‡nh trÃªn Ä‘Ä©a cÃ¹ng tÃªn vá»›i má»™t lá»‡nh há»‡ vá» tÃ­ch há»£p mÃ 
    khÃ´ng cáº§n dÃ¹ng tÃªn Ä‘Æ°á»ng dáº«n Ä‘áº§y Ä‘á»§.

    TÃ¹y chá»n:
      -a    in danh sÃ¡ch cÃ¡c lá»‡nh tÃ­ch há»£p kÃ¨m tráº¡ng thÃ¡i báº­t/táº¯t
      -n    táº¯t TÃŠN hoáº·c hiá»ƒn thá»‹ danh sÃ¡ch lá»‡nh bá»‹ táº¯t
      -p    in danh sÃ¡ch lá»‡nh tÃ­ch há»£p theo Ä‘á»‹nh dáº¡ng dÃ¹ng láº¡i Ä‘Æ°á»£c
      -s    chá»‰ in tÃªn cÃ¡c lá»‡nh tÃ­ch há»£p Posix â€œÄ‘áº·c biá»‡tâ€

    TÃ¹y chá»n Ä‘iá»u khiá»ƒn chá»©c nÄƒng táº£i Ä‘á»™ng:
      -f    náº¡p lá»‡nh tÃ­ch há»£p TÃŠN tá»« Táº¬P-TIN
      -d    bá» má»™t tÃ­ch há»£p Ä‘Æ°á»£c náº¡p báº±ng â€œ-fâ€

    KhÃ´ng cÃ³ tÃ¹y chá»n thÃ¬ coi nhÆ° báº­t TÃŠN.

    Äá»ƒ sá»­ dá»¥ng lá»‡nh â€œtestâ€ trÃªn Ä‘Ä©a (náº¿u tÃ¬m tháº¥y trong $PATH) thay
    cho phiÃªn báº£n há»‡ vá» tÃ­ch há»£p, gÃµ â€œenable -n testâ€.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng trá»« khi TÃŠN khÃ´ng pháº£i lá»‡nh tÃ­ch há»£p hoáº·c gáº·p lá»—i. Äá»‹nh giÃ¡ biá»ƒu thá»©c sá»‘ há»c.

    BTHá»¨C Ä‘Æ°á»£c tÃ­nh tÃ¹y theo cÃ¡c quy táº¯c vá» Ä‘á»‹nh giÃ¡ sá»‘ há»c.
    TÆ°Æ¡ng Ä‘Æ°Æ¡ng vá»›i â€œlet BTHá»¨Câ€.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i 1 náº¿u BTHá»¨C tÃ­nh lÃ  0; khÃ´ng thÃ¬ tráº£ láº¡i 0. Äá»‹nh giÃ¡ biá»ƒu thá»©c sá»‘ há»c.

    Äá»‹nh giÃ¡ má»—i Äá»I-Sá» dáº¡ng biá»ƒu thá»©c sá»‘ há»c. Äá»‹nh giÃ¡ theo sá»‘ nguyÃªn
    cÃ³ giá»›i háº¡n, khÃ´ng kiá»ƒm tra trÃ n sá»‘, máº·c dÃ¹ cÃ³ báº«y chia cho khÃ´ng
    vÃ  báº­t cá» lá»—i. Danh sÃ¡ch toÃ¡n tá»­ bÃªn dÆ°á»›i Ä‘Æ°á»£c nhÃ³m theo nhÃ³m Ä‘á»™
    Æ°u tiÃªn ngang hÃ ng. Danh sÃ¡ch theo Ä‘á»™ Æ°u tiÃªn giáº£m dáº§n.

    	id++, id--	tiá»n tiá»n/giáº£m
    	++id, --id	háº­u gia/giáº£m
    	-, +		trá»«, cá»™ng (dáº¥u)
    	!, ~		phá»§ Ä‘á»‹nh lÃ´gÃ­c vÃ  trÃªn bit
    	**		sá»‘ mÅ©
    	*, /, %		nhÃ¢n, chia, sá»‘ dÆ°
    	+, -		cá»™ng, trá»«
    	<<, >>		dá»‹ch bit trÃ¡i/pháº£i
    	<=, >=, <, >	so sÃ¡nh
    	==, !=		báº±ng, khÃ´ng báº±ng
    	&		phÃ©p AND trÃªn bit
    	^		phÃ©p XOR trÃªn bit
    	|		phÃ©p OR trÃªn bit
    	&&		phÃ©p AND lÃ´gÃ­c
    	||		phÃ©p OR lÃ´gÃ­c
    	BTHá»¨C ? BTHá»¨C : BTHá»¨C
    			toÃ¡n tá»« Ä‘iá»u kiá»‡n
    	=, *=, /=, %=,
    	+=, -=, <<=, >>=,
    	&=, ^=, |=	phÃ©p gÃ¡n

    Biáº¿n há»‡ vá» cÃ³ thá»ƒ dÃ¹ng lÃ m toÃ¡n háº¡ng. TÃªn biáº¿n Ä‘Æ°á»£c thay tháº¿ báº±ng
    giÃ¡ trá»‹ biáº¿n (chuyá»ƒn thÃ nh sá»‘ nguyÃªn) trong biá»ƒu thá»©c. Biáº¿n khÃ´ng
    cáº§n cÃ³ thuá»™c tÃ­nh sá»‘ nguyÃªn Ä‘á»ƒ dÃ¹ng lÃ m biá»ƒu thá»©c.

    CÃ¡c toÃ¡n tá»­ Ä‘Æ°á»£c Ä‘á»‹nh giÃ¡ theo thá»© tá»± Æ°u tiÃªn. CÃ¡c biá»ƒu thá»©c con
    náº±m trong dáº¥u ngoáº·c Ä‘Æ°á»£c Ä‘á»‹nh giÃ¡ trÆ°á»›c tiÃªn, vÃ  cÃ³ quyá»n cao hÆ¡n
    cÃ¡c quy táº¯c Ä‘i trÆ°á»›c bÃªn trÃªn.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Náº¿u Äá»I-Sá» cuá»‘i cÃ¹ng Ä‘Æ°á»£c Ä‘á»‹nh giÃ¡ thÃ nh 0 thÃ¬ tráº£ vá» 1; khÃ´ng thÃ¬
    tráº£ vá» 0. Äá»‹nh giÃ¡ biá»ƒu thá»©c Ä‘iá»u kiá»‡n.
    
    ThoÃ¡t vá»›i tráº¡ng thÃ¡i 0 (Ä‘Ãºng) hoáº·c 1 (sai), tÃ¹y káº¿t quáº£ Ä‘á»‹nh giÃ¡
    BTHá»¨C. Biá»ƒu thá»©c cÃ³ thá»ƒ kiá»ƒu má»™t ngÃ´i hoáº·c hai ngÃ´i. Biá»ƒu thá»©c
    má»™t ngÃ´i thÆ°á»ng dÃ¹ng Ä‘á»ƒ kiá»ƒm tra tráº¡ng thÃ¡i táº­p tin. NgoÃ i ra cÃ²n
    cÃ³ toÃ¡n tá»­ chuá»—i vÃ  so sÃ¡nh sá»‘.
    
    HÃ nh vi cá»§a lá»‡nh test phá»¥ thuá»™c vÃ o sá»‘ Ä‘á»‘i sá»‘. Äá»c sá»• tay hÆ°á»›ng dáº«n cá»§a
    bash Ä‘á»ƒ cÃ³ mÃ´ táº£ Ä‘áº§y Ä‘á»§.
    
    ToÃ¡n tá»­ táº­p tin:
    
      -a Táº¬P-TIN       ÄÃºng náº¿u táº­p tin tá»“n táº¡i.
      -b Táº¬P-TIN       ÄÃºng náº¿u táº­p tin lÃ  biá»‡t khá»‘i.
      -c Táº¬P-TIN       ÄÃºng náº¿u táº­p tin lÃ  Ä‘áº·c biá»‡t kÃ½ tá»±.
      -d Táº¬P-TIN       ÄÃºng náº¿u táº­p tin lÃ  thÆ° má»¥c.
      -e Táº¬P-TIN       ÄÃºng náº¿u táº­p tin tá»“n táº¡i.
      -f Táº¬P-TIN       ÄÃºng náº¿u táº­p tin tá»“n táº¡i vÃ  lÃ  táº­p tin thÆ°á»ng
      -g Táº¬P-TIN       ÄÃºng náº¿u táº­p tin lÃ  set-group-id.
      -h Táº¬P-TIN       ÄÃºng náº¿u táº­p tin lÃ  liÃªn káº¿t má»m.
      -L Táº¬P-TIN       ÄÃºng náº¿u táº­p tin lÃ  liÃªn káº¿t má»m.
      -k Táº¬P-TIN       ÄÃºng náº¿u táº­p tin cÃ³ bit â€œstickyâ€.
      -p Táº¬P-TIN       ÄÃºng náº¿u táº­p tin lÃ  á»‘ng dáº«n cÃ³ tÃªn.
      -r Táº¬P-TIN       ÄÃºng náº¿u táº­p tin báº¡n Ä‘á»c Ä‘Æ°á»£c.
      -s Táº¬P-TIN       ÄÃºng náº¿u táº­p tin tá»“n táº¡i vÃ  khÃ´ng rá»—ng.
      -S Táº¬P-TIN       ÄÃºng náº¿u táº­p tin lÃ  socket.
      -t FD            ÄÃºng náº¿u FD Ä‘Æ°á»£c má»Ÿ trÃªn thiáº¿t bá»‹ cuá»‘i.
      -u Táº¬P-TIN       ÄÃºng náº¿u táº­p tin lÃ  set-user-id.
      -w Táº¬P-TIN       ÄÃºng náº¿u táº­p tin ghi Ä‘Æ°á»£c (bá»Ÿi báº¡n).
      -x Táº¬P-TIN       ÄÃºng náº¿u táº­p tin cháº¡y Ä‘Æ°á»£c (bá»Ÿi báº¡n).
      -O Táº¬P-TIN       ÄÃºng náº¿u táº­p tin thá»±c táº¿ Ä‘Æ°á»£c báº¡n sá»Ÿ há»¯u.
      -G Táº¬P-TIN       ÄÃºng náº¿u táº­p tin thá»±c táº¿ Ä‘Æ°á»£c nhÃ³m cá»§a báº¡n sá»Ÿ há»¯u.
      -N Táº¬P-TIN       ÄÃºng náº¿u táº­p tin Ä‘Ã£ bá»‹ sá»­a Ä‘á»•i tá»« láº§n Ä‘á»c cuá»‘i.
    
      Táº¬P-TIN1 -nt Táº¬P-TIN2
                       ÄÃºng náº¿u táº­p tin 1 má»›i hÆ¡n táº­p tin 2 (dá»±a theo
                       ngÃ y sá»­a Ä‘á»•i)
    
      Táº¬P-TIN1 -ot Táº¬P-TIN2
                       ÄÃºng náº¿u táº­p tin 1 cÅ© hÆ¡n táº­p tin 2.
    
      Táº¬P-TIN1 -ef Táº¬P-TIN2
                       ÄÃºng náº¿u táº­p tin 1 lÃ  liÃªn káº¿t cá»©ng tá»›i táº­p tin 2.
    
    ToÃ¡n tá»­ chuá»—i:
    
      -z CHUá»–I         ÄÃºng náº¿u chuá»—i rá»—ng.
    
      -n CHUá»–I
      CHUá»–I            ÄÃºng náº¿u chuá»—i khÃ¡c rá»—ng.
    
      CHUá»–I1 = CHUá»–I2  ÄÃºng náº¿u hai chuá»—i báº±ng nhau.
      CHUá»–I1 != CHUá»–I2 ÄÃºng náº¿u hai chuá»—i khÃ¡c nhau.
      CHUá»–I1 < CHUá»–I2  ÄÃºng náº¿u CHUá»–I1 xáº¿p trÆ°á»›c CHUá»–I2 theo thá»© tá»± tá»« Ä‘iá»ƒn.
      CHUá»–I1 > CHUá»–I2  ÄÃºng náº¿u CHUá»–I1 xáº¿p sau CHUá»–I2 theo thá»© tá»± tá»« Ä‘iá»ƒn.
    
    ToÃ¡n tá»­ khÃ¡c:
    
      -o TÃ™Y_CHá»ŒN      ÄÃºng náº¿u tÃ¹y chá»n há»‡ vá» nÃ y Ä‘Æ°á»£c báº­t.
      -v BIáº¾N          ÄÃºng náº¿u BIáº¾N há»‡ vá» nÃ y Ä‘Æ°á»£c Ä‘áº·t
      -R BIáº¾N          ÄÃºng náº¿u BIáº¾N há»‡ vá» nÃ y Ä‘Æ°á»£c Ä‘áº·t lÃ  tham chiáº¿u tÃªn.
      ! BTHá»¨C          ÄÃºng náº¿u biá»ƒu thá»©c nÃ y khÃ´ng Ä‘Ãºng.
      BTHá»¨C1 -a BTHá»¨C2  ÄÃºng náº¿u cáº£ hai biá»ƒu thá»©c lÃ  Ä‘Ãºng.
      BTHá»¨C1 -o BTHá»¨C2  ÄÃºng náº¿u má»™t hoáº·c hai biá»ƒu thá»©c Ä‘Ãºng.
    
      Äá»I-Sá»1 OP Äá»I-Sá»2
                       PhÃ©p thá»­ sá»‘ há»c. OP (toÃ¡n tá»­) lÃ  má»™t trong -eq, -ne,
                       -lt, -le, -gt, or -ge.
    
    PhÃ©p toÃ¡n sá»‘ há»c hai ngÃ´i tráº£ vá» Ä‘Ãºng náº¿u Äá»I-Sá»1 báº±ng, khÃ¡c, nhá»
    hÆ¡n, nhá» hÆ¡n hoáº·c báº±ng, lá»›n hÆ¡n, lá»›n hÆ¡n hoáº·c báº±ng Äá»I-Sá»2.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u BTHá»¨C Ä‘á»‹nh giÃ¡ lÃ  ÄÃºng; khÃ´ng thÃ nh cÃ´ng
    náº¿u BTHá»¨C Ä‘á»‹nh giÃ¡ thÃ nh Sai hay Ä‘á»‘i sá»‘ Ä‘Æ°á»£c chá»‰ ra sai. Äá»‹nh giÃ¡ biá»ƒu thá»©c Ä‘iá»u kiá»‡n.
    
    Lá»‡nh nÃ y cÃ¹ng chá»©c nÄƒng lá»‡nh tÃ­ch há»£p "test", nhÆ°ng Ä‘á»‘i sá»‘ cuá»‘i
    cÃ¹ng pháº£i lÃ  kÃ½ tá»± â€œ]â€ Ä‘á»ƒ khá»›p vá»›i â€œ[â€ á»Ÿ Ä‘áº§u. Thá»±c thi má»™t lá»‡nh Ä‘Æ¡n giáº£n, hoáº·c hiá»ƒn thá»‹ thÃ´ng tin vá» lá»‡nh.
    
    Cháº¡y Lá»†NH vá»›i cÃ¡c Äá»I-Sá» mÃ  khÃ´ng thá»±c hiá»‡n tra cá»©u hÃ m há»‡ vá»,
    hoáº·c hiá»ƒn thá»‹ thÃ´ng tin vá» Lá»†NH. CÃ³ thá»ƒ Ä‘Æ°á»£c dÃ¹ng Ä‘á»ƒ gá»i lá»‡nh trÃªn
    Ä‘Ä©a khi Ä‘Ã£ cÃ³ hÃ m cÃ¹ng tÃªn.
    
    TÃ¹y chá»n:
      -p   dÃ¹ng giÃ¡ trá»‹ máº·c Ä‘á»‹nh cho ÄÆ¯á»œNG_DáºªN
           mÃ  cháº¯c cháº¯n sáº½ tÃ¬m má»i tiá»‡n Ã­ch chuáº©n
      -v   in mÃ´ táº£ vá» Lá»†NH mÃ  tÆ°Æ¡ng tá»± nhÆ° lá»‡nh tÃ­ch há»£p â€œtypeâ€
      -V   in mÃ´ táº£ chi tiáº¿t hÆ¡n cá»§a má»—i Lá»†NH
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i tráº¡ng thÃ¡i thoÃ¡t cá»§a Lá»†NH, hoáº·c tháº¥t báº¡i náº¿u khÃ´ng tÃ¬m
    tháº¥y Lá»†NH. DÃ¹ng cÃ¡c Ä‘á»‘i sá»‘ Ä‘á»ƒ cháº¡y lá»‡nh há»‡ vá».

    Gá»™p cÃ¡c Äá»I-Sá» thÃ nh má»™t chuá»—i Ä‘Æ¡n, dÃ¹ng káº¿t quáº£ lÃ m Ä‘áº§u vÃ o cho
    há»‡ vá» vÃ  cháº¡y lá»‡nh Ä‘Ã³.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i tráº¡ng thÃ¡i thoÃ¡t cá»§a cÃ¢u lá»‡nh hay thÃ nh cÃ´ng náº¿u lá»‡nh rá»—ng. Thá»±c thi lá»‡nh chá»«ng nÃ o phÃ©p thá»­ váº«n khÃ´ng thÃ nh cÃ´ng.

    Khai triá»ƒn vÃ  thá»±c thi CÃC;CÃ‚U;Lá»†NH chá»«ng nÃ o lá»‡nh cuá»‘i cÃ¹ng trong â€œuntilâ€ Lá»†NH
    cÃ³ tráº¡ng thÃ¡i thoÃ¡t lÃ  khÃ¡c khÃ´ng.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i tráº¡ng thÃ¡i cá»§a cÃ¢u lá»‡nh cuá»‘i cÃ¹ng Ä‘Æ°á»£c cháº¡y. Thá»±c thi lá»‡nh chá»«ng nÃ o phÃ©p thá»­ cÃ²n thÃ nh cÃ´ng.

    Khai triá»ƒn vÃ  thá»±c thi CÃC;CÃ‚U;Lá»†NH chá»«ng nÃ o lá»‡nh cuá»‘i cÃ¹ng trong â€œwhileâ€ Lá»†NH
    cÃ³ tráº¡ng thÃ¡i thoÃ¡t lÃ  khÃ´ng.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i tráº¡ng thÃ¡i cá»§a cÃ¢u lá»‡nh cuá»‘i cÃ¹ng Ä‘Æ°á»£c cháº¡y. Thá»±c thi cÃ¢u lá»‡nh cÃ³ Ä‘iá»u kiá»‡n.

    Danh sÃ¡ch â€œif CÃC;CÃ‚U;Lá»†NHâ€ Ä‘Æ°á»£c thá»±c thi. Náº¿u tráº¡ng thÃ¡i thoÃ¡t lÃ  khÃ´ng,
    thÃ¬ thá»±c thi danh sÃ¡ch â€œthen Lá»†NHâ€. KhÃ´ng thÃ¬ thá»±c thi láº§n lÆ°á»£t
    má»—i danh sÃ¡ch â€œelif Lá»†NHâ€. vÃ  náº¿u tráº¡ng thÃ¡i thoÃ¡t lÃ  khÃ´ng, thÃ¬
    thá»±c thi danh sÃ¡ch â€œthen Lá»†NHâ€ tÆ°Æ¡ng á»©ng vÃ  hoÃ n táº¥t lá»‡nh
    â€œifâ€. KhÃ´ng thÃ¬ thá»±c thi danh sÃ¡ch â€œelse Lá»†NHâ€ náº¿u cÃ³. Tráº¡ng thÃ¡i
    thoÃ¡t cá»§a toÃ n bá»™ lá»‡nh â€œifâ€ lÃ  tráº¡ng thÃ¡i cá»§a lá»‡nh cuá»‘i cÃ¹ng Ä‘Æ°á»£c
    cháº¡y, hoáº·c khÃ´ng náº¿u khÃ´ng cÃ³ Ä‘iá»u kiá»‡n nÃ o tráº£ vá» káº¿t quáº£ lÃ 
    Ä‘Ãºng.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i tráº¡ng thÃ¡i cá»§a cÃ¢u lá»‡nh cuá»‘i cÃ¹ng Ä‘Æ°á»£c cháº¡y. Thá»±c thi lá»‡nh chá»n theo máº«u.

    Thá»±c thi Lá»†NH má»™t cÃ¡ch chá»n dá»±a vÃ o Tá»ª tÆ°Æ¡ng á»©ng vá»›i MáºªU. Nhiá»u
    máº«u cÃ¡ch nhau báº±ng â€œ|â€.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i tráº¡ng thÃ¡i cá»§a cÃ¢u lá»‡nh cuá»‘i cÃ¹ng Ä‘Æ°á»£c cháº¡y. Thá»±c thi lá»‡nh cho tá»«ng pháº§n tá»­ náº±m trong danh sÃ¡ch.

    VÃ²ng láº·p â€œforâ€ thá»±c thi lá»‡nh cho tá»«ng pháº§n tá»­ náº±m trong danh sÃ¡ch. KhÃ´ng
    ghi â€œin Tá»ª â€¦â€ thÃ¬ ngáº§m Ä‘á»‹nh â€œin "$@"â€. Äá»‘i vá»›i má»—i pháº§n tá»­ trong
    danh sÃ¡ch, Ä‘áº·t giÃ¡ trá»‹ pháº§n tá»­ Ä‘Ã³ cho biáº¿n TÃŠN rá»“i thá»±c thi CÃC;CÃ‚U;Lá»†NH.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i tráº¡ng thÃ¡i cá»§a cÃ¢u lá»‡nh cuá»‘i cÃ¹ng Ä‘Æ°á»£c cháº¡y. Thá»±c thi lá»‡nh tá»« táº­p tin trong há»‡ vá» hiá»‡n táº¡i.

    Äá»c vÃ  thá»±c thi lá»‡nh tá»« Táº¬P-TIN trong há»‡ vá» Ä‘ang cháº¡y. $PATH Ä‘Æ°á»£c
    dÃ¹ng Ä‘á»ƒ tÃ¬m thÆ° má»¥c chá»©a táº­p tin nÃ y. Náº¿u cÃ³ Ä‘á»‘i sá»‘ thÃ¬ má»—i Ä‘á»‘i sá»‘
    trá»Ÿ thÃ nh tham sá»‘ vá»‹ trÃ­ khi Táº¬P-TIN Ä‘Æ°á»£c thá»±c thi.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i tráº¡ng thÃ¡i cá»§a cÃ¢u lá»‡nh cuá»‘i cÃ¹ng Ä‘Æ°á»£c thá»±c thi trong
    Táº¬P-TIN; khÃ´ng thÃ nh cÃ´ng náº¿u khÃ´ng thá»ƒ Ä‘á»c Táº¬P-TIN. Thá»±c thi cÃ¢u lá»‡nh cÃ³ Ä‘iá»u kiá»‡n.

    Tráº£ vá» tráº¡ng thÃ¡i 0 hoáº·c 1 tÃ¹y vÃ o phÃ©p tÃ­nh biá»ƒu thá»©c Ä‘iá»u kiá»‡n
    BTHá»¨C. Biá»ƒu thá»©c bao gá»“m cÃ¡c thÃ nh pháº§n dÃ¹ng trong lá»‡nh tÃ­ch há»£p
    â€œtestâ€ vÃ  cÃ³ thá»ƒ Ä‘Æ°á»£c tá»• há»£p báº±ng cÃ¡c toÃ¡n tá»­ sau:
    
      ( BTHá»¨C )		Tráº£ vá» giÃ¡ trá»‹ cá»§a BTHá»¨C
      ! BTHá»¨C		ÄÃºng náº¿u BTHá»¨C lÃ  khÃ´ng Ä‘Ãºng. NgÆ°á»£c láº¡i sai
      BTHá»¨C1 && BTHá»¨C2	ÄÃºng náº¿u cáº£ hai biá»ƒu thá»©c Ä‘á»u Ä‘Ãºng. NgÆ°á»£c láº¡i sai.
      BTHá»¨C1 || BTHá»¨C2	ÄÃºng náº¿u má»™t trong hai biá»ƒu thá»©c Ä‘Ãºng. NgÆ°á»£c láº¡i sai.
    
    Khi dÃ¹ng toÃ¡n tá»« â€œ==â€ vÃ  â€œ!=â€, chuá»—i bÃªn pháº£i toÃ¡n tá»­ Ä‘Æ°á»£c dÃ¹ng
    lÃ m máº«u, vÃ  thá»±c hiá»‡n khá»›p máº«u. Khi dÃ¹ng toÃ¡n tá»­ â€œ=~â€, chuá»—i bÃªn
    pháº£i toÃ¡n tá»­ Ä‘Æ°á»£c dÃ¹ng lÃ m biá»ƒu thá»©c chÃ­nh quy.

    ToÃ¡n tá»­ â€œ&&â€ vÃ  â€œ||â€ khÃ´ng tÃ­nh BTHá»¨C2 náº¿u BTHá»¨C1 Ä‘á»§ Ä‘á»ƒ xÃ¡c Ä‘á»‹nh
    giÃ¡ trá»‹ toÃ n biá»ƒu thá»©c.

    Tráº¡ng thÃ¡i thoÃ¡t:
    0 hay 1 phá»¥ thuá»™c vÃ o giÃ¡ trá»‹ cá»§a BTHá»¨C. Cháº¡y lá»‡nh tÃ­ch há»£p há»‡ vá».

    Cháº¡y SHELL-BUILTIN vá»›i Äá»I-Sá» mÃ  khÃ´ng thá»±c hiá»‡n tÃ¬m lá»‡nh. Há»¯u Ã­ch
    khi báº¡n muá»‘n cÃ i Ä‘áº·t láº¡i lá»‡nh há»‡ vá» tÃ­ch há»£p dáº¡ng hÃ m há»‡ vá», nhÆ°ng
    cáº§n cháº¡y lá»‡nh tÃ­ch há»£p trong hÃ m Ä‘Ã³.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i tráº¡ng thÃ¡i thoÃ¡t cá»§a SHELL-BUILTIN, hoáº·c sai náº¿u
    SHELL-BUILTIN khÃ´ng pháº£i lÃ  má»™t lá»‡nh tÃ­ch há»£p há»‡ vá». ThoÃ¡t %d ThoÃ¡t há»‡ vá» Ä‘Äƒng nháº­p.

   ThoÃ¡t khá»i há»‡ vá» Ä‘Äƒng nháº­p vá»›i tráº¡ng thÃ¡i N. Tráº£ vá» lá»—i náº¿u khÃ´ng
   pháº£i há»‡ vá» Ä‘Äƒng nháº­p. ThoÃ¡t khá»i vÃ²ng láº·p for, while hoáº·c until.

    ThoÃ¡t khá»i vÃ²ng láº·p for, while hoáº·c until. Náº¿u xÃ¡c Ä‘á»‹nh N thÃ¬
    thoÃ¡t N vÃ²ng láº·p.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº¡ng thÃ¡i thoÃ¡t lÃ  0 trá»« khi N nhá» hÆ¡n 1. ThoÃ¡t há»‡ vá».

    ThoÃ¡t khá»i há»‡ vá» vá»›i tráº¡ng thÃ¡i N. KhÃ´ng xÃ¡c Ä‘á»‹nh N thÃ¬ tráº¡ng thÃ¡i
    thoÃ¡t lÃ  tráº¡ng thÃ¡i cá»§a lá»‡nh cuá»‘i cÃ¹ng Ä‘Æ°á»£c cháº¡y. Giá»›i háº¡n táº­p tin Lá»—i dáº¥u cháº¥m Ä‘á»™ng Äá»‹nh dáº¡ng vÃ  in Äá»I-Sá» theo Ä‘iá»u khiá»ƒn cá»§a Äá»ŠNH_Dáº NG.
    
    TÃ¹y chá»n:
      -v BIáº¾N	gÃ¡n káº¿t xuáº¥t cho biáº¿n há»‡ vá» nÃ y thay vÃ¬
        	hiá»ƒn thá»‹ nÃ³ trÃªn Ä‘áº§u ra chuáº©n
    
    Äá»ŠNH_Dáº NG lÃ  chuá»—i kÃ½ tá»± mÃ  chá»©a ba kiá»ƒu Ä‘á»‘i tÆ°á»£ng: kÃ½ tá»± bÃ¬nh
    thÆ°á»ng, cÃ¡i nÃ y Ä‘Æ°á»£c chÃ©p ra Ä‘áº§u ra chuáº©n; dÃ£y kÃ½ tá»± thoÃ¡t, dÃ¹ng Ä‘á»ƒ
    chuyá»ƒn Ä‘á»•i sau Ä‘Ã³ sao chÃ©p sang Ä‘áº§u ra chuáº©n; vÃ  cÃ¡c kÃ½ hiá»‡u Ä‘áº·c táº£ Ä‘á»‹nh dáº¡ng,
    má»—i Ä‘áº·c táº£ nÃ y tÃ¡c Ä‘á»™ng lÃªn Ä‘á»‘i sá»‘ tÆ°Æ¡ng á»©ng.
    
    NgoÃ i Ä‘áº·c táº£ Ä‘á»‹nh dáº¡ng chuáº©n Ä‘Æ°á»£c dÃ¹ng trong printf(1) vÃ  printf(3),
    printf Ä‘Æ°á»£c hiá»ƒu nhá»¯ng Ä‘áº·c táº£ sau:
    
      %b	khai triá»ƒn dÃ£y thoÃ¡t gáº¡ch chÃ©o ngÆ°á»£c trong Ä‘á»‘i sá»‘ tÆ°Æ¡ng á»©ng
      %q	trÃ­ch dáº«n Ä‘á»‘i sá»‘ theo cÃ¡ch dÃ¹ng láº¡i lÃ m dá»¯ liá»‡u Ä‘áº§u vÃ o há»‡ vá»
      %(fmt)T	xuáº¥t chuá»—i ngÃ y thÃ¡ng theo Ä‘á»‹nh dáº¡ng FMT tá»« strftime(3)
    
    Äá»‹nh dáº¡ng Ä‘Æ°á»£c dÃ¹ng láº¡i Ä‘á»ƒ cÃ³ thá»ƒ dÃ¹ng háº¿t Ä‘á»‘i sá»‘. Náº¿u
    á»Ÿ Ä‘Ã¢y cÃ³ Ã­t Ä‘á»‘i sá»‘ hÆ¡n yÃªu cáº§u cá»§a Ä‘á»‹nh dáº¡ng, Ä‘á»‹nh dáº¡ng thá»«a Ä‘Ã³ Ä‘Æ°á»£c
    xá»­ lÃ½ theo cÃ¡ch lÃ  sáº½ cÃ³ giÃ¡ trá»‹ báº±ng sá»‘ khÃ´ng hay chuá»—i rá»—ng,
    Ä‘Æ°á»£c Ã¡p dá»¥ng.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng trá»« phi Ä‘Æ°a ra tÃ¹y chá»n sai hay gáº·p lá»—i khi ghi
    hay gÃ¡n. GNU bash, phiÃªn báº£n %s (%s)
 GNU bash, phiÃªn báº£n %s-(%s)
 TÃ¹y chá»n dÃ i:
 Trá»£ giÃºp chung vá» cÃ¡ch sá»­ dá»¥ng pháº§n má»m GNU : <http://www.gnu.org/gethelp/>
 NhÃ³m lá»‡nh lÃ m má»™t Ä‘Æ¡n vá»‹.

    Cháº¡y táº­p há»£p cÃ¡c lá»‡nh trong cÃ¹ng má»™t nhÃ³m. ÄÃ¢y lÃ  má»™t cÃ¡ch Ä‘á»ƒ
    chuyá»ƒn hÆ°á»›ng toÃ n bá»™ má»™t nhÃ³m lá»‡nh.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i tráº¡ng thÃ¡i cá»§a cÃ¢u lá»‡nh cuá»‘i cÃ¹ng Ä‘Æ°á»£c cháº¡y. Dá»¯ liá»‡u nháº­p HFT bá»‹ hoÃ£n CÃ³ cháº¿ Ä‘á»™ mÃ n hÃ¬nh HFT KhÃ´ng cÃ³ cháº¿ Ä‘á»™ mÃ n hÃ¬nh HFT ÄÃ£ hoÃ n thÃ nh chuá»—i Ã¢m thanh HFT ChÆ°a Ä‘áº·t biáº¿n mÃ´i trÆ°á»ng HOME Treo KhÃ´ng cÃ³ tÃªn! I/O sáºµn sÃ ng THBÃO: CÃ¢u lá»‡nh khÃ´ng Ä‘Æ°á»£c phÃ©p yÃªu cáº§u thÃ´ng tin Ngáº¯t Bá»‹ giáº¿t Giáº¥y phÃ©p GPLv3+: GNU GPL phiÃªn báº£n 3 hoáº·c má»›i hÆ¡n <http://gnu.org/licenses/gpl.html>
 ÄÃ¡nh dáº¥u biáº¿n há»‡ vá» lÃ  khÃ´ng thá»ƒ thay Ä‘á»•i.
    
    ÄÃ¡nh dáº¥u TÃŠN lÃ  chá»‰ Ä‘á»c; giÃ¡ trá»‹ nhá»¯ng TÃŠN nÃ y khÃ´ng Ä‘Æ°á»£c thay
    Ä‘á»•i trong cÃ¡c phÃ©p gÃ¡n sau. Náº¿u cÃ³ GIÃ-TRá»Š thÃ¬ gÃ¡n GIÃ-TRá»Š trÆ°á»›c
    khi Ä‘Ã¡nh dáº¥u lÃ  chá»‰ Ä‘á»c.
    
    TÃ¹y chá»n:
      -a	tham chiáº¿u Ä‘áº¿n biáº¿n kiá»ƒu máº£ng chá»‰ sá»‘
      -A	tham chiáº¿u Ä‘áº¿n biáº¿n kiá»ƒu máº£ng káº¿t há»£p
      -f	tham chiáº¿u Ä‘áº¿n hÃ m há»‡ vá»
      -p	hiá»ƒn thá»‹ danh sÃ¡ch biáº¿n vÃ  hÃ m chá»‰ Ä‘á»c, tÃ¹y thuá»™c vÃ o
         		cÃ³ tÃ¹y chá»n -f hay khÃ´ng
    
    Äá»‘i sá»‘ â€œ--â€ ngá»«ng phÃ¢n tÃ­ch tÃ¹y chá»n cho cÃ¡c tham sá»‘ cÃ²n láº¡i.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u khÃ´ng Ä‘Æ°a ra tÃ¹y chá»n sai hay TÃŠN khÃ´ng há»£p lá»‡. Sá»­a Ä‘á»•i hoáº·c hiá»ƒn thá»‹ cÃ¡c tÃ¹y chá»n tá»± hoÃ n thiá»‡n.

    Sá»­a Ä‘á»•i cÃ¡c tÃ¹y chá»n tá»± hoÃ n thiá»‡n Ä‘á»‘i vá»›i má»—i TÃŠN, hoáº·c náº¿u khÃ´ng Ä‘Æ°a
    ra TÃŠN thÃ¬ chá»©c nÄƒng tá»± hoÃ n thiá»‡n hiá»‡n táº¡i sáº½ Ä‘Æ°á»£c thi hÃ nh, náº¿u khÃ´ng
    TÃ™Y_CHá»ŒN Ä‘Æ°á»£c chá»‰ ra, in ra cÃ¡c tÃ¹y chá»n tá»± hoÃ n thiá»‡n cho má»—i TÃŠN hay
    cÃ¡c Ä‘áº·c tÃ­nh ká»¹ thuáº­t hiá»‡n cÃ³

    TÃ¹y chá»n:
      -o tÃ¹y_chá»n	Ä‘áº·t TÃ™Y_CHá»ŒN tá»± hoÃ n thiá»‡n nÃ y Ä‘á»‘i vá»›i má»—i TÃŠN
      -D		Sá»­a TÃ™Y_CHá»ŒN vá» tá»± hoÃ n thiá»‡n lá»‡nh â€œdefaultâ€
      -E		Sá»­a TÃ™Y_CHá»ŒN vá» tá»± hoÃ n thiá»‡n lá»‡nh â€œemptyâ€

    DÃ¹ng â€œ+oâ€ thay cho â€œ-oâ€ thÃ¬ táº¯t tÃ¹y chá»n Ä‘Æ°a ra.

    Äá»‘i sá»‘:

    Má»—i TÃŠN tham chiáº¿u Ä‘áº¿n má»™t cÃ¢u lá»‡nh cho Ä‘Ã³ má»™t Ä‘áº·c táº£ tá»± hoÃ n thiá»‡n
    pháº£i Ä‘Æ°á»£c xÃ¡c Ä‘á»‹nh trÆ°á»›c dÃ¹ng tÃ­ch há»£p â€œcompleteâ€. Náº¿u khÃ´ng Ä‘Æ°a
    ra TÃŠN Ä‘á»ƒ Ã¡p dá»¥ng, thÃ¬ â€œcompoptâ€ pháº£i Ä‘Æ°á»£c gá»i bá»Ÿi má»™t hÃ m Ä‘ang
    táº¡o viá»‡c tá»± hoÃ n thiá»‡n, vÃ  cÃ¡c tÃ¹y chá»n vá» hÃ m táº¡o viá»‡c tá»± hoÃ n thiá»‡n Ä‘ang
    cháº¡y cÅ©ng Ä‘Æ°á»£c sá»­a Ä‘á»•i.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng trá»« phi Ä‘Æ°a ra tÃ¹y chá»n sai, hoáº·c TÃŠN cÃ³ má»™t
    Ä‘áº·c táº£ tá»± hoÃ n thiá»‡n Ä‘Æ°á»£c xÃ¡c Ä‘á»‹nh. Sá»­a Ä‘á»•i giá»›i háº¡n tÃ i nguyÃªn há»‡ vá».
    
    Äiá»u khiá»ƒn tÃ i nguyÃªn sáºµn cÃ³ cá»§a há»‡ vá» vÃ  cÃ¡c tiáº¿n trÃ¬nh nÃ³ táº¡o ra,
    trÃªn há»‡ thá»‘ng há»— trá»£ Ä‘iá»ƒu khiá»ƒn tÃ i nguyÃªn nhÆ° váº­y.
    
    TÃ¹y chá»n:
      -S	dÃ¹ng giá»›i háº¡n tÃ i nguyÃªn â€œsoftâ€ (má»m)
      -H	dÃ¹ng giá»›i háº¡n tÃ i nguyÃªn â€œhardâ€ (cá»©ng)
      -a	thÃ´ng bÃ¡o má»i giá»›i háº¡n hiá»‡n thá»i
      -b	kÃ­ch cá»¡ cá»§a vÃ¹ng Ä‘á»‡m socket
      -c	kÃ­ch cá»¡ tá»‘i Ä‘a cá»§a táº­p tin core Ä‘Æ°á»£c táº¡o
      -d	kÃ­ch cá»¡ tá»‘i Ä‘a cá»§a tá»«ng Ä‘oáº¡n dá»¯ liá»‡u cá»§a má»™t tiáº¿n trÃ¬nh
      -e	má»©c Æ°u tiÃªn láº­p lá»‹ch cao nháº¥t (â€œniceâ€)
      -f	kÃ­ch cá»¡ táº­p tin tá»‘i Ä‘a Ä‘Æ°á»£c ghi bá»Ÿi há»‡ vá» vÃ  tiáº¿n trÃ¬nh con
      -i	sá»‘ tÃ­n hiá»‡u bá»‹ hoÃ£n tá»‘i Ä‘a
      -k	sá»‘ lÆ°á»£ng kqueues Ä‘Æ°á»£c phÃ¢n bá»• tá»‘i Ä‘a cho tiáº¿n trÃ¬nh nÃ y
      -l	kÃ­ch cá»¡ tá»‘i Ä‘a mÃ  tiáº¿n trÃ¬nh cÃ³ thá»ƒ khÃ³a vÃ o bá»™ nhá»›
      -m	kÃ­ch cá»¡ táº­p ná»™i trÃº (RSS) tá»‘i Ä‘a
      -n	sá»‘ bá»™ mÃ´ táº£ táº­p tin tá»‘i Ä‘a Ä‘Æ°á»£c má»Ÿ
      -p	kÃ­ch thÆ°á»›c vÃ¹ng Ä‘á»‡m á»‘ng dáº«n
      -q	sá»‘ byte tá»‘i Ä‘a trong hÃ ng Ä‘á»£i thÃ´ng Ä‘iá»‡p POSIX
      -r	má»©c Æ°u láº­p lá»‹ch thá»i gian thá»±c cao nháº¥t
      -s	kÃ­ch thÆ°á»›c ngÄƒn xáº¿p tá»‘i Ä‘a
      -t	lÆ°á»£ng thá»i gian cpu tá»‘i Ä‘a theo giÃ¢y
      -u	sá»‘ tiáº¿n trÃ¬nh ngÆ°á»i dÃ¹ng tá»‘i Ä‘a
      -v	kÃ­ch cá»¡ cá»§a bá»™ nhá»› áº£o
      -x	sá»‘ khÃ³a táº­p tin tá»‘i Ä‘a
      -P	sá»‘ lÆ°á»£ng thiáº¿t bá»‹ cuá»‘i áº£o tá»‘i Ä‘a
      -T	sá»‘ lÆ°á»£ng tuyáº¿n trÃ¬nh tá»‘i Ä‘a
    
    KhÃ´ng pháº£i táº¥t cáº£ cÃ¡c tÃ¹y-chá»n nÃ y Ä‘á»u sáºµn sÃ ng trÃªn má»i ná»n táº£ng.
    
    Náº¿u cÃ³ GIá»šI_Háº N thÃ¬ nÃ³ lÃ  giÃ¡ trá»‹ má»›i cá»§a tÃ i nguyÃªn Ä‘Æ°á»£c ghi. Ba
    giÃ¡ trá»‹ GIá»šI_Háº N Ä‘áº·c biá»‡t â€œsoftâ€, â€œhardâ€ vÃ  â€œunlimitedâ€ tÆ°Æ¡ng á»©ng
    lÃ  giá»›i háº¡n má»m hiá»‡n táº¡i, giá»›i háº¡n cá»©ng hiá»‡n táº¡i vÃ  khÃ´ng giá»›i
    háº¡n. KhÃ´ng cÃ³ thÃ¬ in giÃ¡ trá»‹ hiá»‡n thá»i cá»§a tÃ i nguyÃªn Ä‘Æ°á»£c ghi.
    Ngáº§m Ä‘á»‹nh â€œ-fâ€ náº¿u khÃ´ng chá»‰ Ä‘á»‹nh tÃ¹y chá»n.
    
    GiÃ¡ trá»‹ tÃ­nh theo khá»‘i 1024 byte, trá»« -t tÃ­nh theo giÃ¢y, -p theo
    khá»‘i 512 byte vÃ  -u theo sá»‘ tiáº¿n trÃ¬nh.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u khÃ´ng Ä‘Æ°a ra tÃ¹y chá»n sai hay cÃ³ lá»—i phÃ¡t sinh. NÃ¢ng cÃ´ng viá»‡c ná»n lÃªn trÆ°á»›c.

    NÃ¢ng lÃªn trÆ°á»›c cÃ´ng viá»‡c Ä‘Æ°á»£c Ä‘á»‹nh nghÄ©a bá»Ÿi Ä‘áº·c táº£ cÃ´ng viá»‡c ÄTCV
    lÃ m cÃ´ng viá»‡c hiá»‡n thá»i. KhÃ´ng cÃ³ ÄTCV thÃ¬ dÃ¹ng cÃ´ng viá»‡c hiá»‡n
    thá»i cá»§a há»‡ vá».

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº¡ng thÃ¡i cá»§a cÃ¢u lá»‡nh Ä‘Æ°á»£c nÃ¢ng lÃªn trÆ°á»›c; hoáº·c tháº¥t báº¡i náº¿u xáº£y
    ra lá»—i. Chuyá»ƒn cÃ´ng viá»‡c xuá»‘ng cháº¡y ná»n.

    Chuyá»ƒn cÃ´ng viá»‡c Ä‘á»‹nh nghÄ©a theo Ä‘áº·c táº£ cÃ´ng viá»‡c ÄTCV sang cháº¡y
    ná»n, nhÆ° thá»ƒ lá»‡nh Ä‘Æ°á»£c cháº¡y vá»›i â€œ&â€. Náº¿u khÃ´ng cÃ³ ÄTCV, dÃ¹ng cÃ´ng
    viá»‡c hiá»‡n thá»i cá»§a há»‡ vá».

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u chá»©c nÄƒng Ä‘iá»u khiá»ƒn cÃ´ng viá»‡c Ä‘Æ°á»£c báº­t vÃ 
    khÃ´ng gáº·p lá»—i. CÃ¢u lá»‡nh vÃ´ giÃ¡ trá»‹.
    
    KhÃ´ng cÃ³ tÃ¡c dá»¥ng gÃ¬: cÃ¢u lá»‡nh khÃ´ng lÃ m gÃ¬ cáº£.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    LÃºc nÃ o cÅ©ng thÃ nh cÃ´ng. ChÆ°a Ä‘áº·t biáº¿n mÃ´i trÆ°á»ng OLDPWD PhÃ¢n tÃ­ch Ä‘á»‘i sá»‘ tÃ¹y chá»n.

    Getopts Ä‘Æ°á»£c há»‡ vá» dÃ¹ng Ä‘á»ƒ phÃ¢n tÃ­ch tham sá»‘ thÃ nh tÃ¹y chá»n.

    CHUá»–I-TÃ™Y-CHá»ŒN chá»©a nhá»¯ng chá»¯ tÃ¹y chá»n cáº§n nháº­n ra; má»™t chá»¯ cÃ³ dáº¥u hai
    cháº¥m theo sau thÃ¬ tÃ¹y chá»n cáº§n Ä‘á»‘i sá»‘, cÃ¡ch tÃ¹y chá»n báº±ng khoáº£ng
    tráº¯ng.

    Má»—i láº§n gá»i, getopts sáº½ Ä‘áº·t tÃ¹y chá»n káº¿ tiáº¿p vÃ o biáº¿n há»‡ vá» $TÃŠN,
    táº¡o biáº¿n má»›i náº¿u tÃªn Ä‘Ã³ chÆ°a tá»“n táº¡i, vÃ  Ä‘áº·t chá»‰ sá»‘ cá»§a Ä‘á»‘i sá»‘ káº¿
    tiáº¿p cáº§n xá»­ lÃ½ vÃ o biáº¿n há»‡ vá» OPTIND. OPTIND Ä‘Æ°á»£c khá»Ÿi Ä‘á»™ng báº±ng 1
    má»—i láº§n há»‡ vá» hay má»™t vÄƒn lá»‡nh há»‡ vá» Ä‘Æ°á»£c gá»i. Khi tÃ¹y chá»n cáº§n
    Ä‘á»‘i sá»‘, getopts Ä‘áº·t Ä‘á»‘i sá»‘ Ä‘Ã³ vÃ o biáº¿n há»‡ vá» OPTARG.

    getopts thÃ´ng bÃ¡o lá»—i báº±ng má»™t trong hai cÃ¡ch. Náº¿u kÃ½ tá»± Ä‘áº§u tiÃªn
    cá»§a CHUá»–I-TÃ™Y-CHá»ŒN lÃ  dáº¥u hai cháº¥m, getopts thÃ´ng bÃ¡o lá»—i im
    láº·ng. Cháº¿ Ä‘á»™ nÃ y khÃ´ng in ra thÃ´ng bÃ¡o nÃ o. Náº¿u gáº·p tÃ¹y chá»n sai
    thÃ¬ getopts lÆ°u mÃ£ kÃ½ tá»± tÃ¹y chá»n trong biáº¿n OPTARG. KhÃ´ng tÃ¬m
    tháº¥y Ä‘á»‘i sá»‘ cáº§n thiáº¿t thÃ¬ getopts lÆ°u dáº¥u hai cháº¥m trong biáº¿n $TÃŠN
    vÃ  Ä‘áº·t lÆ°u mÃ£ kÃ½ tá»± tÃ¹y chá»n trong OPTARG. Náº¿u getopts khÃ´ng trong
    cháº¿ Ä‘á»™ im láº·ng vÃ  gáº·p tÃ¹y chá»n sai, getopts lÆ°u dáº¥u há»i â€œ?â€  vÃ o
    biáº¿n $TÃŠN vÃ  xÃ³a OPTARG. KhÃ´ng tÃ¬m tháº¥y tÃ¹y chá»n cáº§n thiáº¿t thÃ¬ â€œ?â€
    Ä‘Æ°á»£c lÆ°u vÃ o $TÃŠN, OPTARG bá»‹ xlÃ¡, vÃ  in ra má»™t thÃ´ng Ä‘iá»‡p cháº©n
    Ä‘oÃ¡n.

    Náº¿u biáº¿n há»‡ vá» OPTERR cÃ³ giÃ¡ trá»‹ 0, getopts sáº½ khÃ´ng in thÃ´ng bÃ¡o
    ká»ƒ cáº£ khi kÃ½ tá»± Ä‘áº§u tiÃªn cá»§a CHUá»–I-TÃ™Y-CHá»ŒN khÃ´ng pháº£i dáº¥u hai
    cháº¥m. OPTERR cÃ³ giÃ¡ trá»‹ máº·c Ä‘á»‹nh lÃ  1.

    Getopts bÃ¬nh thÆ°á»ng phÃ¢n tÃ­ch tham sá»‘ vá»‹ trÃ­ ($0 - $9). Tuy nhiÃªn,
    cÃ¡c Ä‘á»‘i sá»‘ bá»• sung cÅ©ng Ä‘Æ°á»£c phÃ¢n tÃ­ch.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u tÃ¬m tháº¥y má»™t tÃ¹y chá»n; khÃ´ng thÃ nh cÃ´ng náº¿u
    gáº·p káº¿t thÃºc cÃ¡c tÃ¹y chá»n, hoáº·c náº¿u gáº·p lá»—i. In tÃªn thÆ° má»¥c hiá»‡n táº¡i.
    
    TÃ¹y chá»n:
      -L  in giÃ¡ trá»‹ cá»§a $PWD náº¿u nÃ³ chá»©a tÃªn cá»§a thÆ° má»¥c hiá»‡n táº¡i
      -P  in thÆ° má»¥c váº­t lÃ½, khÃ´ng liÃªn káº¿t má»m
    
    Máº·c Ä‘á»‹nh â€œpwdâ€ cháº¡y nhÆ° cÃ³ máº·t â€œ-Lâ€.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ vá» 0 trá»« khi Ä‘Æ°a ra tÃ¹y chá»n sai hoáº·c khÃ´ng Ä‘á»c Ä‘Æ°á»£c thÆ° má»¥c hiá»‡n táº¡i. ThoÃ¡t Äá»c má»™t dÃ²ng tá»« Ä‘áº§u vÃ o tiÃªu chuáº©n vÃ  tÃ¡ch ra nhiá»u trÆ°á»ng.
    
    Äá»c má»™t dÃ²ng tá»« Ä‘áº§u vÃ o tiÃªu chuáº©n, hoáº·c tá»« bá»™ mÃ´ táº£ táº­p tin FD náº¿u
    dÃ¹ng tÃ¹y chá»n â€œ-uâ€. DÃ²ng Ä‘Æ°á»£c chia ra nhiá»u trÆ°á»ng, trÆ°á»ng Ä‘áº§u
    tiÃªn Ä‘Æ°á»£c gÃ¡n cho biáº¿n TÃŠN Ä‘áº§u tiÃªn, tá»« thá»© hai cho TÃŠN thá»© hai,
    vÃ  cá»© nhÆ° váº­y, vÃ  tá»« cÃ²n láº¡i nÃ o Ä‘Æ°á»£c gÃ¡n cho TÃŠN cuá»‘i cÃ¹ng. Chá»‰ nhá»¯ng kÃ½
    tá»± trong $IFS Ä‘Æ°á»£c coi lÃ  kÃ½ tá»± phÃ¢n cÃ¡ch.
    
    KhÃ´ng cÃ³ TÃŠN thÃ¬ dÃ²ng Ä‘Æ°á»£c Ä‘á»c sáº½ lÆ°u vÃ o biáº¿n REPLY.
    
    TÃ¹y chá»n:
      -a Máº¢NG	lÆ°u cÃ¡c trÆ°á»ng vÃ o biáº¿n máº£ng chá»‰ sá»‘ Máº¢NG theo thá»© tá»±,
        	báº¯t Ä‘áº§u tá»« khÃ´ng.
      -d NGÄ‚N_CÃCH	tiáº¿p tá»¥c Ä‘áº¿n khi Ä‘á»c kÃ½ tá»± Ä‘áº§u tiÃªn cá»§a DELIM thay
    		cho kÃ½ tá»± xuá»‘ng dÃ²ng
      -e 	dÃ¹ng Readline Ä‘á»ƒ láº¥y dÃ²ng trong há»‡ vá» tÆ°Æ¡ng tÃ¡c
      -i CHUá»–I	dÃ¹ng CHUá»–I lÃ m vÄƒn báº£n Ä‘áº§u tiÃªn cho Readline
      -n nChá»¯	tráº£ vá» sau khi Ä‘á»c Ä‘á»§ sá»‘ lÆ°á»£ng kÃ½ tá»± nÃ y thay vÃ¬ Ä‘á»c háº¿t dÃ²ng
    		nhÆ°ng náº¿u gáº·p chuá»—i phÃ¢n tÃ¡ch khi Ã­t hÆ¡n Nchá»¯
    		cÃ¡c kÃ½ tá»± Ä‘Æ°á»£c Ä‘á»c trÆ°á»›c chuá»—i phÃ¢n tÃ¡ch
      -N N	tráº£ vá» chá»‰ sau khi Ä‘á»c chÃ­nh xÃ¡c sá»‘ lÆ°á»£ng kÃ½ tá»± nÃ y,
        	náº¿u khÃ´ng gáº·p káº¿t thÃºc táº­p tin (EOF) hay quÃ¡ háº¡n Ä‘á»c,
        	cÅ©ng bá» qua dáº¥u tÃ¡ch nÃ o
      -p NHáº®C	xuáº¥t chuá»—i NHáº®C mÃ  khÃ´ng cÃ³ kÃ½ tá»± dÃ²ng má»›i theo sau,
        	trÆ°á»›c khi Ä‘á»c
      -r	khÃ´ng cho phÃ©p gáº¡ch chÃ©o ngÆ°á»£c Ä‘á»ƒ thoÃ¡t kÃ½ tá»±
      -s	khÃ´ng hiá»‡n láº¡i dá»¯ liá»‡u nháº­p Ä‘áº¿n tá»« thiáº¿t bá»‹ cuá»‘i
      -t	THá»œI_GIAN_CHá»œ
        	thá»i gian chá» tá»‘i Ä‘a vÃ  tráº£ vá»i khÃ´ng thÃ nh cÃ´ng náº¿u chÆ°a Ä‘á»c má»™t
        	dÃ²ng dá»¯ liá»‡u nháº­p hoÃ n toÃ n trong sá»‘ giÃ¢y nÃ y. GiÃ¡ trá»‹
        	cá»§a biáº¿n TMOUT lÃ  thá»i háº¡n máº·c Ä‘á»‹nh.  Thá»i háº¡n nÃ y cÃ³
        	thá»ƒ lÃ  má»™t phÃ¢n sá»‘. Náº¿u THá»œI_Háº N lÃ  0 thÃ¬ viá»‡c Ä‘á»c tráº£
        	láº¡i thÃ nh cÃ´ng chá»‰ náº¿u dá»¯ liá»‡u nháº­p sáºµn sÃ ng trÃªn bá»™
        	mÃ´ táº£ táº­p tin Ä‘Æ°a ra. Tráº¡ng thÃ¡i thoÃ¡t lá»›n hÆ¡n 128
        	náº¿u vÆ°á»£t quÃ¡ thá»i háº¡n nÃ y.
      -u FD	Ä‘á»c tá»« bá»™ mÃ´ táº£ táº­p tin FD thay cho Ä‘áº§u vÃ o tiÃªu chuáº©n
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    MÃ£ tráº£ láº¡i lÃ  sá»‘ khÃ´ng, náº¿u khÃ´ng gáº·p káº¿t thÃºc táº­p tin, hay chá» quÃ¡
    lÃ¢u, hoáº·c Ä‘Æ°a ra bá»™ mÃ´ táº£ táº­p tin sai lÃ m Ä‘á»‘i sá»‘ cho â€œ-uâ€. Äá»c cÃ¡c dÃ²ng tá»« má»™t táº­p tin vÃ o má»™t biáº¿n máº£ng.
    
    Giá»‘ng vá»›i â€œmapfileâ€. Äá»c cÃ¡c dÃ²ng tá»« Ä‘áº§u vÃ o tiÃªu chuáº©n vÃ o má»™t biáº¿n máº£ng chá»‰ sá»‘.
    
    Äá»c cÃ¡c dÃ²ng tá»« Ä‘áº§u vÃ o tiÃªu chuáº©n vÃ o biáº¿n máº£ng Máº¢NG, hoáº·c tá»« bá»™
    mÃ´ táº£ táº­p tin FD náº¿u Ä‘Æ°a ra tÃ¹y chá»n -u. Biáº¿n MAPFILE lÃ  Máº¢NG máº·c
    Ä‘á»‹nh.
    
    TÃ¹y chá»n:
      -d ngÄƒn_cÃ¡ch	DÃ¹ng NGÄ‚N_CÃCH cháº¥m dá»©t dÃ²ng, thay cho kÃ½ tá»± dÃ²ng má»›i
      -n Sá»	sao chÃ©p nhiá»u nháº¥t Sá» dÃ²ng. Náº¿u lÃ  0 thÃ¬ sao chÃ©p má»i dÃ²ng.
      -O Gá»C	báº¯t Ä‘áº§u gÃ¡n cho Máº¢NG á»Ÿ chá»‰ sá»‘ Gá»C. Chá»‰ sá»‘ máº·c Ä‘á»‹nh lÃ  0.
      -s Sá»	bá» qua Sá» dÃ²ng Ä‘áº§u tiÃªn Ä‘Æ°á»£c Ä‘á»c.
      -t	gá»¡ bá» má»™t kÃ½ tá»± NGÄ‚N_CÃCH theo sau khá»i má»—i dÃ²ng Ä‘Æ°á»£c Ä‘á»c
        	(máº·c Ä‘á»‹nh lÃ  kÃ½ tá»± dÃ²ng má»›i).
      -u FD	Ä‘á»c cÃ¡c dÃ²ng tá»« bá»™ mÃ´ táº£ táº­p tin FD thay vÃ o tá»« Ä‘áº§u vÃ o tiÃªu chuáº©n.
      -C Gá»ŒI_NGÆ¯á»¢C	Ä‘á»‹nh giÃ¡ Gá»ŒI_NGÆ¯á»¢C má»—i láº§n Ä‘á»c LÆ¯á»¢NG dÃ²ng.
      -c LÆ¯á»¢NG	ghi rÃµ sá»‘ cÃ¡c dÃ²ng Ä‘Æ°á»£c Ä‘á»c giá»¯a hai láº§n Gá»ŒI_NGÆ¯á»¢C.
    
    Äá»‘i sá»‘:
      Máº¢NG	tÃªn biáº¿n máº£ng cáº§n dÃ¹ng cho dá»¯ liá»‡u táº­p tin.
    
    Náº¿u Ä‘Æ°a ra -C mÃ  khÃ´ng cÃ³ -c thÃ¬ lÆ°á»£ng máº·c Ä‘á»‹nh lÃ  5000. Khi Æ°á»›c
    lÆ°á»£ng lá»i Gá»ŒI_NGÆ¯á»¢C thÃ¬ nÃ³ nháº­n chá»‰ sá»‘ cá»§a pháº§n tá»­ máº£ng káº¿ tiáº¿p
    Ä‘Æ°á»£c gÃ¡n dÆ°á»›i dáº¡ng má»™t Ä‘á»‘i sá»‘ bá»• sung.
    
    KhÃ´ng Ä‘Æ°a ra má»™t Gá»C rÃµ rÃ ng thÃ¬ mapfile (táº­p tin sÆ¡ Ä‘á»“) sáº½ xÃ³a
    sáº¡ch Máº¢NG trÆ°á»›c khi gÃ¡n cho nÃ³.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng trá»« phi Ä‘Æ°a ra tÃ¹y chá»n sai vÃ  Máº¢NG khÃ´ng pháº£i
    chá»‰ Ä‘á»c hay khÃ´ng lÃ  má»™t máº£ng chá»‰ sá»‘. KhÃ³a báº£n ghi Nhá»› hoáº·c hiá»ƒn thá»‹ vá»‹ trÃ­ chÆ°Æ¡ng trÃ¬nh.
    
    XÃ¡c Ä‘á»‹nh vÃ  ghi nhá»› tÃªn Ä‘Æ°á»ng dáº«n Ä‘áº§y Ä‘á»§ cá»§a má»—i TÃŠN cÃ¢u lá»‡nh.
    Náº¿u khÃ´ng Ä‘Æ°a ra Ä‘á»‘i sá»‘, hiá»ƒn thá»‹ thÃ´ng tin vá» cÃ¡c cÃ¢u lá»‡nh Ä‘Æ°á»£c
    ghi nhá»›.
    
    TÃ¹y chá»n:
      -d	quÃªn vá»‹ trÃ­ Ä‘Ã£ nhá»› cá»§a TÃŠN
      -l	hiá»ƒn thá»‹ theo Ä‘á»‹nh dáº¡ng dÃ¹ng láº¡i lÃ m Ä‘áº§u vÃ o Ä‘Æ°á»£c
      -p	TÃŠN_ÄÆ¯á»œNG_DáºªN	dÃ¹ng TÃŠN_ÄÆ¯á»œNG_DáºªN lÃ  tÃªn Ä‘Æ°á»ng dáº«n Ä‘áº§y Ä‘á»§ cá»§a TÃŠN
      -r	quÃªn má»i vá»‹ trÃ­ Ä‘Ã£ nhá»›
      -t	in vá»‹ trÃ­ Ä‘Ã£ nhá»› cá»§a TÃŠN, in tÃªn trÆ°á»›c vá»‹
         		trÃ­ náº¿u TÃŠN tÆ°Æ¡ng á»©ng vá»›i nhiá»u vá»‹ trÃ­
    
    Äá»‘i sá»‘:
      TÃŠN	má»—i TÃŠN Ä‘Æ°á»£c tÃ¬m trong $PATH vÃ  Ä‘Æ°á»£c thÃªm vÃ o
        		danh sÃ¡ch cÃ¡c cÃ¢u lá»‡nh Ä‘Æ°á»£c ghi nhá»›.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u tÃ¬m Ä‘Æ°á»£c TÃŠN vÃ  khÃ´ng Ä‘Æ°a ra tÃ¹y chá»n sai. Gá»¡ bá» thÆ° má»¥c khá»i ngÄƒn xáº¿p.
    
    Gá»¡ bá» thÆ° má»¥c khá»i ngÄƒn xáº¿p thÆ° má»¥c. KhÃ´ng cÃ³ Ä‘á»‘i sá»‘ thÃ¬ gá»¡ bá» thÆ°
    má»¥c Ä‘áº§u khá»i ngÄƒn xáº¿p vÃ  â€œcdâ€ sang thÆ° má»¥c Ä‘áº§u má»›i.
    
      -n	NgÄƒn chuyá»ƒn Ä‘á»•i bÃ¬nh thÆ°á»ng khi gá»¡ bá» thÆ° má»¥c
        	khá»i ngÄƒn xáº¿p, Ä‘á»ƒ thao tÃ¡c chá»‰ ngÄƒn xáº¿p.
    
      +N	Gá»¡ bá» thÆ° má»¥c thá»© N (Ä‘áº¿m tá»« trÃ¡i danh sÃ¡ch
        	â€œdirsâ€  (báº¯t Ä‘áº§u tá»« sá»‘ khÃ´ng). VÃ­ dá»¥: â€œpopd +0â€ bá»
        	thÆ° má»¥c cuá»‘i cÃ¹ng, â€œpopd +1â€ bá» thÆ° má»¥c thá»© hai.
    
      -N	Gá»¡ bá» thÆ° má»¥c thá»© N (Ä‘áº¿m tá»« pháº£i danh sÃ¡ch
        	â€œdirsâ€ (báº¯t Ä‘áº§u tá»« sá»‘ khÃ´ng). VÃ­ dá»¥: â€œpopd -0â€ bá»
        	thÆ° má»¥c cuá»‘i cÃ¹ng, â€œpopd -1â€  bá» thÆ° má»¥c giÃ¡p cuá»‘i.
    
    Lá»‡nh tÃ­ch há»£p â€œdirsâ€ hiá»ƒn thá»‹ ngÄƒn xáº¿p thÆ° má»¥c.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u khÃ´ng Ä‘Æ°a ra Ä‘á»‘i sá»‘ sai, cÅ©ng khÃ´ng sai
    chuyá»ƒn Ä‘á»•i thÆ° má»¥c. Gá»¡ bá» TÃŠN khá»i danh sÃ¡ch cÃ¡c bÃ­ danh.
    
    TÃ¹y chá»n:
      -a	bá» táº¥t cáº£ cÃ¡c bÃ­ danh.
    
    Tráº£ láº¡i thÃ nh cÃ´ng trá»« khi TÃŠN khÃ´ng pháº£i lÃ  má»™t bÃ­ danh. Bá» cÃ´ng viá»‡c khá»i há»‡ vá» Ä‘ang cháº¡y.
    
    Gá»¡ bá» cÃ´ng viá»‡c xÃ¡c Ä‘á»‹nh bá»Ÿi Ä‘áº·c táº£ cÃ´ng viá»‡c ÄTCV ra khá»i báº£ng cÃ¡c
    cÃ´ng viá»‡c hoáº¡t Ä‘á»™ng. KhÃ´ng cÃ³ ÄTCV thÃ¬ dÃ¹ng cÃ´ng viá»‡c hiá»‡n thá»i cá»§a há»‡ vá».
    
    TÃ¹y chá»n:
      -a	bá» má»i cÃ´ng viá»‡c náº¿u khÃ´ng cÃ³ ÄTCV
      -h	Ä‘Ã¡nh dáº¥u ÄTCV Ä‘á»ƒ khÃ´ng gá»­i tÃ­n hiá»‡u SIGHUP
        	cho cÃ´ng viá»‡c khi há»‡ vá» nháº­n Ä‘Æ°á»£c SIGHUP
      -r	chá»‰ bá» nhá»¯ng cÃ´ng viá»‡c Ä‘ang cháº¡y
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u khÃ´ng Ä‘Æ°a ra tÃ¹y chá»n hay ÄTCV sai. Gá»¡ bá» thÆ° má»¥c khá»i ngÄƒn xáº¿p thÆ° má»¥c. KhÃ´ng Ä‘Æ°a ra Ä‘á»‘i sá»‘ thÃ¬ bá» thÆ° má»¥c
    Ä‘áº§u khá»i ngÄƒn xáº¿p vÃ  chuyá»ƒn Ä‘á»•i sang thÆ° má»¥c Ä‘áº§u má»›i.

    TÃ¹y chá»n:
      -n	ngÄƒn thay Ä‘á»•i thÆ° má»¥c bÃ¬nh thÆ°á»ng khi thÃªm, chá»‰ thao tÃ¡c
		trÃªn ngÄƒn xáº¿p thÆ° má»¥c.

    Äá»‘i sá»‘:
      +N	xoay ngÄƒn xáº¿p Ä‘á»ƒ thÆ° má»¥c thá»© N (Ä‘áº¿m tá»« bÃªn trÃ¡i â€œdirsâ€. báº¯t
        	Ä‘áº§u tá»« sá»‘ khÃ´ng) náº±m á»Ÿ Ä‘áº§u. VÃ­ dá»¥ â€œpopd +0â€ bá» thÆ° má»¥c
                Ä‘áº§u tiÃªn, â€œpopd +1â€ bá» thÆ° má»¥c thá»© hai.

      -N	xoay ngÄƒn xáº¿p Ä‘á»ƒ thÆ° má»¥c thá»© N (Ä‘áº¿m tá»« bÃªn pháº£i â€œdirsâ€. báº¯t
        	Ä‘áº§u tá»« sá»‘ khÃ´ng) náº±m á»Ÿ Ä‘áº§u. VÃ­ dá»¥ â€œpopd -0â€ bá» thÆ° má»¥c
                cuá»‘i cÃ¹ng, â€œpopd -1â€ bá» thÆ° má»¥c káº¿ cuá»‘i.

    Lá»‡nh â€œdirsâ€ hiá»ƒn thá»‹ ngÄƒn xáº¿p thÆ° má»¥c. Thay tháº¿ há»‡ vá» báº±ng cÃ¢u lá»‡nh Ä‘Æ°a ra.
    
    Thá»±c thi Lá»†NH, thay tháº¿ há»‡ vá» nÃ y báº±ng chÆ°Æ¡ng trÃ¬nh Ä‘Æ°á»£c cháº¡y.
    Äá»I-Sá» trá»Ÿ thÃ nh Ä‘á»‘i sá»‘ cá»§a Lá»†NH. KhÃ´ng Ä‘á»‹nh nghÄ©a Lá»†NH thÃ¬ báº¥t cá»© chuyá»ƒn
    hÆ°á»›ng nÃ o sáº½ xáº£y ra trong há»‡ vá» Ä‘ang cháº¡y.
    
    TÃ¹y chá»n:
      -a TÃŠN	truyá»n TÃŠN cho Lá»†NH dáº¡ng Ä‘á»‘i sá»‘ thá»© khÃ´ng
      -c	thá»±c thi Lá»†NH vá»›i má»™t mÃ´i trÆ°á»ng rá»—ng
      -l	Ä‘áº·t má»™t dáº¥u gáº¡ch vÃ o Ä‘á»‘i sá»‘ thá»© khÃ´ng cá»§a Lá»†NH
    
    Náº¿u Lá»†NH khÃ´ng thá»ƒ thá»±c thi, há»‡ vá» khÃ´ng tÆ°Æ¡ng tÃ¡c sáº½ thoÃ¡t, trá»«
    khi Ä‘áº·t tÃ¹y chá»n há»‡ vá» â€œexecfailâ€.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng trá»« khi khÃ´ng tÃ¬m Ä‘Æ°á»£c Lá»†NH hoáº·c gáº·p lá»—i chuyá»ƒn hÆ°á»›ng. ThÃ´ng bÃ¡o thá»i gian sá»­ dá»¥ng Ä‘á»ƒ thá»±c thi á»‘ng dáº«n.

    Thá»±c thi á»NG-DáºªN vÃ  in tÃ³m táº¯t thá»i gian tháº­t, thá»i gian CPU ngÆ°á»i
    dÃ¹ng, vÃ  thá»i gian CPU há»‡ thá»‘ng Ä‘Æ°á»£c dÃ¹ng Ä‘á»ƒ thá»±c thi á»‘ng dáº«n Ä‘áº¿n
    khi cháº¥m dá»©t.

    TÃ¹y chá»n:
      -p	in báº£n tÃ³m táº¯t thá»i gian theo Ä‘á»‹nh dáº¡ng POSIX

    GiÃ¡ trá»‹ biáº¿n TIMEFORMAT Ä‘Æ°á»£c dÃ¹ng lÃ m Ä‘á»‹nh dáº¡ng káº¿t xuáº¥t.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº¡ng thÃ¡i tráº£ vá» lÃ  tráº¡ng thÃ¡i tráº£ vá» cá»§a á»NG-DáºªN. Tiáº¿p tá»¥c láº¡i cháº¡y vÃ²ng láº·p for, while hoáº·c until.

    Tiáº¿p tá»¥c láº¡i cháº¡y vÃ²ng láº·p for, while hoáº·c until. Náº¿u xÃ¡c Ä‘á»‹nh N
    thÃ¬ tiáº¿p tá»¥c vÃ²ng láº·p thá»© N.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº¡ng thÃ¡i thoÃ¡t lÃ  0 trá»« khi N nhá» hÆ¡n 1. Tiáº¿p tá»¥c láº¡i cÃ´ng viá»‡c á»Ÿ trÆ°á»›c.

    TÆ°Æ¡ng Ä‘Æ°Æ¡ng vá»›i Ä‘á»‘i sá»‘ Ä‘áº·c táº£ cÃ´ng viá»‡c ÄTCV trong lá»‡nh â€œfgâ€.
    Tiáº¿p tá»¥c láº¡i cÃ´ng viá»‡c bá»‹ dá»«ng cháº¡y hay cháº¡y ná»n. ÄTCV cÃ³ thá»ƒ xÃ¡c
    Ä‘á»‹nh tÃªn cÃ´ng viá»‡c hoáº·c mÃ£ sá»‘ cÃ´ng viá»‡c. Äáº·t â€œ&â€ sau ÄTCV sáº½ cháº¡y
    cÃ´ng viá»‡c á»Ÿ ná»n, nhÆ° lÃ  Ä‘á»‘i sá»‘ Ä‘áº·c táº£ cÃ´ng viá»‡c trong â€œbgâ€.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i tráº¡ng thÃ¡i cá»§a cÃ´ng viá»‡c Ä‘Ã£ tiáº¿p tá»¥c láº¡i. Tráº£ láº¡i káº¿t quáº£ thÃ nh cÃ´ng.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    LÃºc nÃ o cÅ©ng thÃ nh cÃ´ng. Tráº£ vá» káº¿t quáº£ khÃ´ng thÃ nh cÃ´ng.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    LÃºc nÃ o cÅ©ng khÃ´ng thÃ nh cÃ´ng. Trá»Ÿ vá» tá»« hÃ m há»‡ vá».

    ThoÃ¡t hÃ m há»‡ vá» hoáº·c vÄƒn lá»‡nh Ä‘Æ°á»£c â€œsourceâ€ vá»›i mÃ£ tráº£ vá» xÃ¡c Ä‘á»‹nh
    bá»Ÿi N. Náº¿u khÃ´ng cÃ³ N, tráº¡ng thÃ¡i thoÃ¡t lÃ  cá»§a lá»‡nh thá»±c hiá»‡n cuá»‘i
    cÃ¹ng trong hÃ m/vÄƒn lá»‡nh.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i N, hoáº·c bá»‹ lá»—i náº¿u há»‡ vá» khÃ´ng Ä‘ang cháº¡y má»™t hÃ m hay vÄƒn
    lá»‡nh. Tráº£ vá» ngá»¯ cáº£nh cá»§a lá»‡nh gá»i hÃ m hiá»‡n thá»i.

    KhÃ´ng cÃ³ BTHá»¨C thÃ¬ tráº£ láº¡i "$line $filename".  CÃ³ BTHá»¨C thÃ¬ tráº£
    láº¡i "$line $subroutine $filename"; thÃ´ng tin bá»• sung nÃ y cÃ³ thá»ƒ
    Ä‘Æ°á»£c dÃ¹ng Ä‘á»ƒ cung cáº¥p stack trace.

    GiÃ¡ trá»‹ cá»§a BTHá»¨C thÃ¬ ngá»¥ Ã½ bao nhiÃªu láº§n gá»i cáº§n lÃ¹i láº¡i Ä‘áº±ng
    trÆ°á»›c lá»‡nh gá»i hiá»‡n táº¡i; khung gá»i Ä‘áº§u lÃ  khung 0.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i 0 trá»« khi há»‡ vá» Ä‘ang cháº¡y hÃ m há»‡ vá», BTHá»¨C cÅ©ng há»£p lá»‡. Tráº£ láº¡i ngá»¯ cáº£nh cá»§a cÃº gá»i thá»§ tá»¥c con hiá»‡n thá»i.

    Náº¿u khÃ´ng cÃ³ BTHá»¨C thÃ¬ tráº£ vá»  Äang cháº¡y Lá»—i phÃ¢n Ä‘oáº¡n Chá»n tá»« tá»« má»™t danh sÃ¡ch vÃ  thá»±c thi lá»‡nh.

    Tá»ª Ä‘Æ°á»£c triá»ƒn khai, phÃ¡t sinh danh sÃ¡ch tá»«. Táº­p há»£p cÃ¡c tá»« káº¿t quáº£ Ä‘Æ°á»£c
    in ra Ä‘áº§u ra lá»—i chuáº©n vá»›i má»™t con sá»‘ á»Ÿ phÃ­a trÆ°á»›c. Ngáº§m Ä‘á»‹nh â€œin
    "$@"â€ náº¿u khÃ´ng cÃ³ â€œin Tá»ªâ€. Dáº¥u nháº¯c PS3 Ä‘Æ°á»£c hiá»ƒn thá»‹ vÃ  má»™t dÃ²ng
    Ä‘Æ°á»£c Ä‘á»c tá»« Ä‘áº§u vÃ o tiÃªu chuáº©n. Náº¿u dÃ²ng bao gá»“m sá»‘ tÆ°Æ¡ng á»©ng vá»›i tá»«
    hiá»ƒn thá»‹ thÃ¬ Ä‘áº·t tá»« Ä‘Ã³ vÃ o biáº¿n TÃŠN. Náº¿u dÃ²ng rá»—ng thÃ¬ hiá»ƒn thá»‹
    láº¡i Tá»ª vÃ  dáº¥u nháº¯c. Náº¿u gáº·p EOF thÃ¬ káº¿t thÃºc. Äáº·t TÃŠN lÃ  rá»—ng vá»›i
    cÃ¡c giÃ¡ trá»‹ khÃ¡c. DÃ²ng Ä‘á»c Ä‘Æ°á»£c lÆ°u vÃ o biáº¿n REPLY. Lá»†NH Ä‘Æ°á»£c thá»±c
    thi sau má»—i láº§n chá»n Ä‘áº¿n khi gáº·p lá»‡nh â€œbreakâ€.


    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i tráº¡ng thÃ¡i cá»§a cÃ¢u lá»‡nh cuá»‘i cÃ¹ng Ä‘Æ°á»£c cháº¡y. Äáº·t cÃ¡c tá»• há»£p phÃ­m vÃ  biáº¿n Readline.
    
    Gáº¯n tá»• há»£p phÃ­m vá»›i má»™t chá»©c nÄƒng hay vÄ© lá»‡nh Readline, hoáº·c
    Ä‘áº·t biáº¿n Readline. CÃº phÃ¡p Ä‘á»‘i sá»‘ khÃ´ng tÃ¹y chá»n giá»‘ng nhÆ° trong
    ~/.inputrc, nhÆ°ng pháº£i Ä‘Æ°á»£c chuyá»ƒn qua dÆ°á»›i dáº¡ng Ä‘á»‘i sá»‘ Ä‘Æ¡n. VÃ­
    dá»¥: bind â€œ"\C-x\C-r": re-read-init-fileâ€.
    
    TÃ¹y chá»n:
      -m SÆ -Äá»’-PHÃM      dÃ¹ng sÆ¡_Ä‘á»“_phÃ­m lÃ m sÆ¡ Ä‘á»“ phÃ­m khi lá»‡nh nÃ y
                         cháº¡y. GiÃ¡ trá»‹ há»£p lá»‡ lÃ  emacs, emacs-standard,
                         emacs-meta, emacs-ctlx, vi, vi-move, vi-command
                         vÃ  vi-insert.
      -l                 Liá»‡t kÃª tÃªn cÃ¡c hÃ m
      -P                 Liá»‡t kÃª tÃªn hÃ m vÃ  tá»• há»£p phÃ­m
      -p                 Liá»‡t kÃª tÃªn hÃ m vÃ  tá»• há»£p phÃ­m theo dáº¡ng dÃ¹ng
                          láº¡i lÃ m Ä‘áº§u vÃ o Ä‘Æ°á»£c
      -S                 Liá»‡t kÃª chuá»—i phÃ­m mÃ  gá»i vÄ© lá»‡nh vÃ  cÃ¡c giÃ¡-trá»‹
                           cá»§a chÃºng
      -s                 Liá»‡t kÃª chuá»—i phÃ­m mÃ  gá»i vÄ© lá»‡nh vÃ  cÃ¡c giÃ¡-trá»‹
                           cá»§a chÃºng theo Ä‘á»‹nh dáº¡ng cÃ³ thá»ƒ dÃ¹ng lÃ m Ä‘áº§u vÃ o
      -V                 Liá»‡t kÃª cÃ¡c biáº¿n vÃ  giÃ¡ trá»‹ cá»§a chÃºng
      -v                 Liá»‡t kÃª cÃ¡c biáº¿n vÃ  giÃ¡ trá»‹ cá»§a chÃºng
                          theo Ä‘á»‹nh dáº¡ng cÃ³ thá»ƒ tÃ¡i sá»­ dá»¥ng lÃ m Ä‘áº§u vÃ o.
      -q TÃŠN-HÃ€M         Há»i phÃ­m nÃ o gá»i hÃ m nÃ y
      -u TÃŠN-HÃ€M         Gá»¡ bá» táº¥t cáº£ phÃ­m táº¯t gáº¯n vá»›i hÃ m nÃ y
      -r DÃƒY-PHÃM        Gá»¡ bá» tá»• há»£p phÃ­m nÃ y
      -f Táº¬P-TIN         Äá»c tá»• há»£p phÃ­m tá»« táº­p tin nÃ y
      -x DÃƒY-PHÃM:Lá»†NH   Cháº¡y Lá»†NH khi nháº­p DÃƒY-PHÃM
      -X                 Liá»‡t kÃª dÃ£y phÃ­m vá»›i tÃ¹y-chá»n -x vÃ  cÃ¡c lá»‡nh káº¿t há»£p
                          theo dáº¡ng cÃ³ thá»ƒ dÃ¹ng lÃ m Ä‘áº§u vÃ o.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    lá»‡nh bind tráº£ vá» 0 trá»« khi Ä‘Æ°a ra tÃ¹y chá»n khÃ´ng nháº­n ra hay gáº·p lá»—i. Äáº·t vÃ  bá» cÃ¡c tÃ¹y chá»n há»‡ vá».
    
    Thay Ä‘á»•i thiáº¿t láº­p cá»§a má»—i tÃ¹y chá»n há»‡ vá» TÃŠN_TÃ™Y_CHá»ŒN.  KhÃ´ng cÃ³
    Ä‘á»‘i sá»‘ tÃ¹y chá»n thÃ¬ liá»‡t kÃª táº¥t cáº£ cÃ¡c tÃ¹y chá»n há»‡ vá» kÃ¨m chá»‰ dáº«n
    tÃ¹y chá»n Ä‘Æ°á»£c Ä‘áº·t hay khÃ´ng.
    
    TÃ¹y chá»n:
      -o	háº¡n cháº¿ TÃŠN_TÃ™Y_CHá»ŒN nhá»¯ng tÃªn Ä‘Æ°á»£c Ä‘á»‹nh nghÄ©a
        	Ä‘á»ƒ sá»­ dá»¥ng vá»›i â€œset -oâ€
      -p	in má»—i tÃ¹y chá»n há»‡ vá» kÃ¨m tráº¡ng thÃ¡i
      -q	ngÄƒn káº¿t xuáº¥t
      -u	táº¯t TÃŠN_TÃ™Y_CHá»ŒN
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u TÃŠN_TÃ™Y_CHá»ŒN Ä‘Æ°á»£c báº­t; khÃ´ng thÃ nh cÃ´ng náº¿u
    Ä‘Æ°a ra tÃ¹y chá»n sai hay TÃŠN_TÃ™Y_CHá»ŒN bá»‹ táº¯t. Äáº·t thuá»™c tÃ­nh xuáº¥t kháº©u cho biáº¿n há»‡ vá».

    ÄÃ¡nh dáº¥u TÃŠN Ä‘á»ƒ tá»± Ä‘á»™ng xuáº¥t vÃ o mÃ´i trÆ°á»ng cá»§a cÃ¡c lá»‡nh Ä‘Æ°á»£c cháº¡y
    sau Ä‘Ã³. CÃ³ GIÃ-TRá»Š thÃ¬ gÃ¡n GIÃ-TRá»Š trÆ°á»›c khi xuáº¥t ra.

    TÃ¹y chá»n:
      -f	tham chiáº¿u Ä‘áº¿n hÃ m há»‡ vá»
      -n	gá»¡ bá» thuá»™c tÃ­nh xuáº¥t kháº©u khá»i TÃŠN
      -p	hiá»ƒn thá»‹ danh sÃ¡ch cÃ¡c biáº¿n vÃ  hÃ m Ä‘Æ°á»£c xuáº¥t ra

    Äá»‘i sá»‘ â€œ--â€ ngá»«ng phÃ¢n tÃ­ch tÃ¹y chá»n cho cÃ¡c tham sá»‘ cÃ²n láº¡i.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u khÃ´ng Ä‘Æ°a ra tÃ¹y chá»n hay TÃŠN sai, Äáº·t giÃ¡ trá»‹ vÃ  thuá»™c tÃ­nh biáº¿n.
    
    Khai bÃ¡o biáº¿n vÃ  gÃ¡n cho thuá»™c tÃ­nh cho nÃ³. Náº¿u khÃ´ng Ä‘Æ°a TÃŠN thÃ¬
    hiá»ƒn thá»‹ thuá»™c tÃ­nh vÃ  giÃ¡ trá»‹ cá»§a má»i biáº¿n.
    
    TÃ¹y chá»n:
      -f	háº¡n cháº¿ hÃ nh Ä‘á»™ng hoáº·c hiá»ƒn thá»‹ tÃªn hÃ m vÃ  Ä‘á»‹nh nghÄ©a
      -F	háº¡n cháº¿ hiá»ƒn thá»‹ chá»‰ tÃªn hÃ m mÃ  thÃ´i
        	(vÃ  sá»‘ thá»© tá»± dÃ²ng vÃ  táº­p tin nguá»“n khi gá»¡ lá»—i)
      -g	táº¡o biáº¿n toÃ n cá»¥c khi sá»­ dá»¥ng trong hÃ m há»‡ vá»; náº¿u khÃ´ng
        	thÃ¬ bá»‹ bá» qua
      -p	hiá»ƒn thá»‹ thuá»™c tÃ­nh vÃ  giÃ¡ trá»‹ cá»§a má»—i TÃŠN
    
    TÃ¹y chá»n dÃ¹ng Ä‘á»ƒ Ä‘áº·t thuá»™c tÃ­nh:
      -a	táº¡o máº£ng chá»‰ sá»‘ tÃªn TÃŠN (náº¿u há»— trá»£)
      -A	táº¡o máº£ng káº¿t há»£p tÃªn TÃŠN (náº¿u há»— trá»£)
      -i	Ä‘áº·t thuá»™c tÃ­nh â€œintegerâ€ (sá»‘ nguyÃªn) cho TÃŠN
      -l	chuyá»ƒn Ä‘á»•i TÃŠN sang chá»¯ thÆ°á»ng khi gÃ¡n
      -n	lÃ m má»™t TÃŠN tham chiáº¿u Ä‘áº¿n biáº¿n cÃ³ tÃªn lÃ  giÃ¡ trá»‹ cá»§a nÃ³
      -r	lÃ m cho TÃŠN chá»‰ Ä‘á»c
      -t	Ä‘áº·t thuá»™c tÃ­nh â€œtraceâ€ cho TÃŠN
      -u	chuyá»ƒn Ä‘á»•i TÃŠN sang chá»¯ hoa khi gÃ¡n
      -x	xuáº¥t kháº©u TÃŠN
    
    DÃ¹ng â€œ+â€ thay cho â€œ-â€ Ä‘á»ƒ táº¯t thuá»™c tÃ­nh Ä‘Æ°a ra.
    
    Biáº¿n cÃ³ thuá»™c tÃ­nh sá»‘ nguyÃªn thÃ¬ Ä‘á»‹nh giÃ¡ theo sá»‘ há»c (xem lá»‡nh
    â€œletâ€  khi biáº¿n Ä‘Æ°á»£c gÃ¡n.
    
    Khi dÃ¹ng trong hÃ m, â€œdeclareâ€ Ä‘áº·t TÃŠN lÃ  cá»¥c bá»™, nhÆ° khi dÃ¹ng lá»‡nh
    â€œlocalâ€ (cá»¥c bá»™). TÃ¹y chá»n -g ngÄƒn hÃ nh vi nÃ y.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng trá»« khi Ä‘Æ°a ra tÃ¹y chá»n sai hoáº·c gáº·p lá»—i khi gÃ¡n biáº¿n. CÃ¢u lá»‡nh há»‡ vá» tÆ°Æ¡ng á»©ng vá»›i tá»« khÃ³a â€œ TÃ¹y chá»n:
 Dá»‹ch vá»‹ trÃ­ Ä‘á»‘i sá»‘.

    Thay Ä‘á»•i tÃªn cá»§a Ä‘á»‘i sá»‘ vá»‹ trÃ­ $N+1,$N+2 â€¦ thÃ nh $1,$2 â€¦
    N lÃ  1 náº¿u khÃ´ng chá»‰ Ä‘á»‹nh.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng trá»« khi N Ã¢m hay lá»›n hÆ¡n $#. TÃ­n hiá»‡u %d Chá»‰ Ä‘á»‹nh cÃ¡ch tá»± hoÃ n thiá»‡n Ä‘á»‘i sá»‘ báº±ng Readline.
    
    Äá»‘i vá»›i má»—i TÃŠN, ghi rÃµ cÃ¡c Ä‘á»‘i sá»‘ sáº½ Ä‘Æ°á»£c tá»± hoÃ n thiá»‡n nhÆ° tháº¿ nÃ o.
    KhÃ´ng Ä‘Æ°a ra tÃ¹y chá»n thÃ¬ in ra cÃ¡c Ä‘áº·c táº£ tá»± hoÃ n thiá»‡n báº±ng má»™t cÃ¡ch
    cho phÃ©p dÃ¹ng láº¡i Ä‘áº·c táº£ lÃ m dá»¯ liá»‡u nháº­p vÃ o.
    
    TÃ¹y chá»n:
      -p	in Ä‘áº·c táº£ tá»± hoÃ n thiá»‡n Ä‘Ã£ tá»“n táº¡i theo Ä‘á»‹nh dáº¡ng dÃ¹ng láº¡i Ä‘Æ°á»£c
      -r	gá»¡ bá» Ä‘áº·c táº£ tá»± hoÃ n thiá»‡n cho má»—i TÃŠN,
        	hoáº·c náº¿u cÃ³ TÃŠN thÃ¬ gá»¡ bá» táº¥t cáº£ cÃ¡c Ä‘áº·c táº£ tá»± hoÃ n thiá»‡n
      -D	Ã¡p dá»¥ng cÃ¡c sá»± hoÃ n thÃ nh vÃ  hÃ nh Ä‘á»™ng lÃ m máº·c Ä‘á»‹nh
        	cho cÃ¢u lá»‡nh mÃ  khÃ´ng xÃ¡c Ä‘á»‹nh sá»± hoÃ n thÃ nh riÃªng
      -E	Ã¡p dá»¥ng cÃ¡c sá»± hoÃ n thÃ nh vÃ  hÃ nh Ä‘á»™ng cho cÃ¢u lá»‡nh â€œtrá»‘ngâ€
        	(empty) -- thá»­ hoÃ n thÃ nh trÃªn dÃ²ng tráº¯ng
    
    Khi chá»©c nÄƒng tá»± hoÃ n thiá»‡n Ä‘Æ°á»£c thá»­, nhá»¯ng hÃ nh Ä‘á»™ng Ä‘Æ°á»£c lÃ m theo thá»©
    tá»± cá»§a nhá»¯ng tÃ¹y chá»n chá»¯ HOA bÃªn trÃªn. TÃ¹y chá»n -D cÃ³ quyá»n Æ°u tiÃªn
    hÆ¡n -E.    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u khÃ´ng Ä‘Æ°a ra tÃ¹y chá»n sai hay gáº·p lá»—i. Bá»‹ dá»«ng Bá»‹ dá»«ng (tÃ­n hiá»‡u) Bá»‹ dá»«ng (tty nháº­p) Bá»‹ dá»«ng (tty xuáº¥t) Bá»‹ dá»«ng(%s) NgÆ°ng cháº¡y há»‡ vá».

    NgÆ°ng cháº¡y há»‡ vá» nÃ y Ä‘áº¿n khi nháº­n tÃ­n hiá»‡u SIGCONT. Náº¿u khÃ´ng Ã©p
    buá»™c thÃ¬ khÃ´ng thá»ƒ ngÆ°ng cháº¡y há»‡ vá» Ä‘Äƒng nháº­p.

    TÃ¹y chá»n:
    	-f	buá»™c ngÆ°ng, tháº­m chÃ­ vá»›i há»‡ vá» Ä‘Äƒng nháº­p

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng trá»« khi chá»©c nÄƒng Ä‘iá»u khiá»ƒn cÃ´ng viá»‡c khÃ´ng
    Ä‘Æ°á»£c báº­t hoáº·c gáº·p lá»—i. Äá»ŠNH Dáº NG THá»œI GIAN: â€œ%câ€: kÃ½ tá»± Ä‘á»‹nh dáº¡ng khÃ´ng há»£p lá»‡ Bá»‹ cháº¥m dá»©t ÄÃ£ Ä‘á»c thÆ° trong %s
 CÃ³ cÃ´ng viá»‡c Ä‘ang cháº¡y.
 CÃ³ cÃ´ng viá»‡c bá»‹ dá»«ng.
 á»ž Ä‘Ã¢y KHÃ”NG Báº¢O HÃ€NH GÃŒ Cáº¢, vá»›i Ä‘iá»u kiá»‡n Ä‘Æ°á»£c phÃ¡p luáº­t cho phÃ©p. Nhá»¯ng cÃ¢u lá»‡nh nÃ y Ä‘Æ°á»£c Ä‘á»‹nh nghÄ©a ná»™i bá»™. GÃµ lá»‡nh â€œhelpâ€ Ä‘á»ƒ xem danh sÃ¡ch nÃ y.
GÃµ â€œhelp TÃŠNâ€ Ä‘á»ƒ biáº¿t chi tiáº¿t vá» hÃ m â€œTÃŠNâ€.
DÃ¹ng â€œinfo bashâ€ Ä‘á»ƒ tÃ¬m thÃ´ng tin chung vá» há»‡ vá» nÃ³i chung.
DÃ¹ng â€œman -kâ€ hoáº·c â€œinfoâ€ Ä‘á»ƒ tÃ¬m thÃ´ng tin vá» lá»‡nh ngoÃ i danh sÃ¡ch nÃ y.

Dáº¥u sao (*) bÃªn cáº¡nh tÃªn nghÄ©a lÃ  lá»‡nh bá»‹ táº¯t.

 ÄÃ¢y lÃ  pháº§n má»m tá»± do; báº¡n cÃ³ quyá»n sá»­a Ä‘á»•i vÃ  phÃ¡t hÃ nh láº¡i nÃ³. Báº«y tÃ­n hiá»‡u vÃ  sá»± kiá»‡n khÃ¡c.

    Äá»‹nh nghÄ©a vÃ  kÃ­ch hoáº¡t cÃ¡c bá»™ xá»­ lÃ½ khi há»‡ vá» nháº­n Ä‘Æ°á»£c tÃ­n hiá»‡u
    hay cÃ¡c Ä‘iá»u kiá»‡n khÃ¡c.

    Äá»I-Sá» lÃ  má»™t lá»‡nh cáº§n Ä‘á»c vÃ  thá»±c thi khi há»‡ vá» nháº­n Ä‘Æ°á»£c tÃ­n
    hiá»‡u theo Ä‘áº·c táº£ tÃ­n hiá»‡u ÄTTH. Náº¿u khÃ´ng cÃ³ Äá»I-Sá» (vÃ  chá»‰ cung
    cáº¥p má»™t ÄTTH), hoáº·c cung cáº¥p â€œ-â€. má»—i tÃ­n hiá»‡u Ä‘Æ°á»£c xÃ¡c Ä‘á»‹nh thÃ¬
    Ä‘Æ°á»£c Ä‘áº·t láº¡i vá» giÃ¡ trá»‹ gá»‘c. Náº¿u Äá»I-Sá» lÃ  chuá»—i rá»—ng thÃ¬ má»—i ÄTTH
    bá»‹ há»‡ vá» vÃ  nhá»¯ng lá»‡nh bÃªn trong bá» qua.

    Náº¿u ÄTTH lÃ  EXIT (0) thÃ¬ Äá»I-Sá» Ä‘Æ°á»£c thá»±c thi khi thoÃ¡t
    khá»i há»‡ vá». Náº¿u lÃ  DEBUG, Äá»I-Sá» Ä‘Æ°á»£c thá»±c thi trÆ°á»›c má»—i lá»‡nh Ä‘Æ¡n
    giáº£n. Náº¿u lÃ  RETURN, Äá»I-Sá» Ä‘Æ°á»£c thá»±c thi má»—i khi hÃ m há»‡ vá» hay
    má»™t vÄƒn lá»‡nh, Ä‘Æ°á»£c cháº¡y bá»Ÿi lá»‡nh â€œ.â€ hoáº·c â€œsourceâ€. káº¿t thÃºc thá»±c
    thi. ÄTTH ERR nghÄ©a lÃ  thá»±c thi Äá»I-Sá» má»—i khi lá»‡nh gáº·p
    lá»—i dáº«n Ä‘áº¿n thoÃ¡t há»‡ vá» khi báº­t tÃ¹y chá»n -e.
    
    Náº¿u khÃ´ng cÃ³ Ä‘á»‘i sá»‘, â€œtrapâ€ sáº½ in danh sÃ¡ch cá»§a cÃ¡c lá»‡nh gáº¯n vá»›i
    cÃ¡c tÃ­n hiá»‡u.
    
    TÃ¹y chá»n:
      -l	in danh sÃ¡ch tÃªn tÃ­n hiá»‡u vÃ  mÃ£ sá»‘ tÆ°Æ¡ng á»©ng
      -p	hiá»ƒn thá»‹ lá»‡nh báº¯t tÆ°Æ¡ng á»©ng vá»›i má»—i ÄTTH

    Má»—i ÄTTH hoáº·c lÃ  tÃªn tÃ­n hiá»‡u trong <signal.h>, hoáº·c mÃ£
    sá»‘ tÃ­n hiá»‡u. TÃªn tÃ­n hiá»‡u khÃ´ng phÃ¢n biá»‡t chá»¯ hoa/thÆ°á»ng, vÃ  khÃ´ng
    báº¯t buá»™c pháº£i dÃ¹ng tiá»n tá»‘ SIG. CÃ³ thá»ƒ gá»­i tÃ­n hiá»‡u cho há»‡ vá» báº±ng
    "kill -signal $$".

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng trá»« phi Ä‘Æ°a ra ÄTTH sai hay tÃ¹y chá»n
    sai. GÃµ â€œ%s -c "help set"â€ Ä‘á»ƒ xem thÃ´ng tin vá» cÃ¡c tÃ¹y chá»n há»‡ vá».
 GÃµ â€œ%s -c helpâ€ Ä‘á»ƒ xem thÃ´ng tin vá» cÃ¡c lá»‡nh há»‡ vá» tÃ­ch há»£p.
 TÃ­n hiá»‡u láº¡ # TÃ­n hiá»‡u láº¡ #%d Lá»—i khÃ´ng rÃµ KhÃ´ng rÃµ tráº¡ng thÃ¡i XÃ³a giÃ¡ trá»‹ vÃ  thuá»™c tÃ­nh cá»§a biáº¿n há»‡ vá» vÃ  cÃ¡c hÃ m.
    
    Äá»‘i vá»›i má»—i TÃŠN, gá»¡ bá» biáº¿n hay hÃ m tÆ°Æ¡ng á»©ng.
    
    TÃ¹y chá»n:
      -f	coi má»—i TÃŠN lÃ  hÃ m há»‡ vá»
      -v	coi má»—i TÃŠN lÃ  biáº¿n há»‡ vá»
      -n	coi TÃŠN nhÆ° lÃ  tÃªn tham chiáº¿u vÃ  bá» Ä‘áº·t biáº¿n Ä‘Ã³ thay vÃ¬
         biáº¿n mÃ  nÃ³ tham chiáº¿u Ä‘áº¿n
    
    KhÃ´ng cÃ³ tÃ¹y chá»n thÃ¬ sáº½ thá»­ xÃ³a biáº¿n, vÃ  náº¿u khÃ´ng thÃ nh cÃ´ng,
    sau Ä‘Ã³ thá»­ xÃ³a hÃ m.
    
    Má»™t sá»‘ biáº¿n khÃ´ng thá»ƒ gá»¡ bá»; nÃªn xem â€œreadonlyâ€.
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u khÃ´ng Ä‘Æ°a ra tÃ¹y chá»n sai hay TÃŠN chá»‰-Ä‘á»c. Äiá»u kiá»‡n IO gáº¥p CÃ¡ch dÃ¹ng:	%s [tÃ¹y chá»n GNU dÃ i] [tÃ¹y chá»n] â€¦
		%s [tÃ¹y chá»n GNU dÃ i] [tÃ¹y chá»n] táº­p-tin-vÄƒn-lá»‡nh â€¦
 DÃ¹ng "%s" Ä‘á»ƒ rá»i há»‡ vá».
 DÃ¹ng lá»‡nh â€œbashbugâ€ Ä‘á»ƒ thÃ´ng bÃ¡o lá»—i.
BÃ¡o cÃ¡o cÃ¡c lá»—i dá»‹ch cho: <http://translationproject.org/team/vi.html>.
 TÃ­n hiá»‡u ngÆ°á»i dÃ¹ng 1 TÃ­n hiá»‡u ngÆ°á»i dÃ¹ng 2 Chá» cÃ´ng viá»‡c cháº¡y xong vÃ  tráº£ vá» tráº¡ng thÃ¡i thoÃ¡t.

    Äá»£i tiáº¿n trÃ¬nh xÃ¡c Ä‘á»‹nh bá»Ÿi ID, cÃ³ thá»ƒ lÃ  mÃ£ sá»‘ tiáº¿n trÃ¬nh hay Ä‘áº·c
    táº£ cÃ´ng viá»‡c, sau Ä‘Ã³ tráº£ vá» tráº¡ng thÃ¡i káº¿t thÃºc cá»§a nÃ³. KhÃ´ng cÃ³
    ID thÃ¬ Ä‘á»£i táº¥t cáº£ cÃ¡c tiáº¿n trÃ¬nh con Ä‘ang cháº¡y vÃ  tráº¡ng thÃ¡i tráº£
    vá» lÃ  khÃ´ng. Náº¿u ID lÃ  Ä‘áº·c táº£ cÃ´ng viá»‡c thÃ¬ Ä‘á»£i táº¥t cáº£ cÃ¡c tiáº¿n
    trÃ¬nh váº«n náº±m trong á»‘ng dáº«n cá»§a cÃ´ng viá»‡c Ä‘Ã³.
    
    Náº¿u tÃ¹y-chá»n -n Ä‘Æ°á»£c Ã¡p dÃ¹ng thÃ¬ Ä‘á»£i cho Ä‘áº¿n khi cÃ´ng viá»‡c káº¿ cháº¥m dá»©t vÃ 
    tráº£ vá» tráº¡ng thÃ¡i thoÃ¡t cá»§a nÃ³.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ vá» tráº¡ng thÃ¡i cá»§a ID cuá»‘i; khÃ´ng thÃ nh cÃ´ng náº¿u ID sai hoáº·c Ä‘Æ°a
    ra tÃ¹y chá»n sai. Äá»£i tiáº¿n trÃ¬nh cháº¡y xong vÃ  tráº£ vá» tráº¡ng thÃ¡i thoÃ¡t.

    Äá»£i tá»«ng tiáº¿n trÃ¬nh Ä‘Ã£ chá»‰ ra theo PID vÃ  bÃ¡o cÃ¡o tráº¡ng thÃ¡i káº¿t thÃºc
    cá»§a nÃ³. Náº¿u khÃ´ng chá»‰ ra PID thÃ¬ Ä‘á»£i táº¥t cáº£ cÃ¡c tiáº¿n trÃ¬nh con Ä‘ang
    cháº¡y, vÃ  mÃ£ vá» lÃ  khÃ´ng. PID pháº£i lÃ  mÃ£ sá»‘ tiáº¿n trÃ¬nh.

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i tráº¡ng thÃ¡i cá»§a PID; khÃ´ng thÃ nh cÃ´ng náº¿u PID sai, hoáº·c náº¿u
    Ä‘Æ°a ra tÃ¹y chá»n sai. Cá»­a sá»• bá»‹ thay Ä‘á»•i Ghi Ä‘á»‘i sá»‘ vÃ o Ä‘áº§u ra chuáº©n.

    Hiá»ƒn thá»‹ Äá»I-Sá» trÃªn Ä‘áº§u ra chuáº©n, kÃ¨m kÃ½ tá»± xuá»‘ng hÃ ng á»Ÿ cuá»‘i.

    TÃ¹y chá»n:
      -n	Ä‘á»«ng thÃªm kÃ½ tá»± xuá»‘ng hÃ ng

    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u khÃ´ng gáº·p lá»—i ghi. Ghi Ä‘á»‘i sá»‘ vÃ o Ä‘áº§u ra tiÃªu chuáº©n.
   
    Hiá»ƒn thá»‹ cÃ¡c Äá»I-Sá», ngÄƒn cÃ¡ch báº±ng dáº¥u cÃ¡ch Ä‘Æ¡n vÃ  kÃ¨m kÃ½ tá»± dÃ²ng má»›i
    ra Ä‘áº§u ra tiÃªu chuáº©n .
   
    TÃ¹y chá»n:
      -n	Ä‘á»«ng thÃªm kÃ½ tá»± dÃ²ng má»›i
      -e	báº­t diá»…n dá»‹ch kÃ½ tá»± thoÃ¡t theo sau kÃ½ tá»± â€œ\â€
      -E	cháº·n diá»…n dá»‹ch kÃ½ tá»± thoÃ¡t
    
    â€œechoâ€ hiá»ƒu nhá»¯ng kÃ½ tá»± thoÃ¡t sau:
      \a	tiáº¿ng chuÃ´ng
      \b	xÃ³a lÃ¹i
      \c	cháº·n káº¿t xuáº¥t tiáº¿p
      \e	kÃ½ tá»± thoÃ¡t
      \E	kÃ½ tá»± thoÃ¡t
      \f	táº£i giáº¥y
      \n	dÃ²ng má»›i
      \r	xuá»‘ng dÃ²ng
      \t	tab Ä‘á»©ng
      \v	tab ngang
      \\	gáº¡ch ngÆ°á»£c
      \0nnn	kÃ½ tá»± cÃ³ mÃ£ ASCII NNN (1-3 chá»¯ sá»‘ bÃ¡t phÃ¢n)
      \xHH	kÃ½ tá»± 8-bit cÃ³ giÃ¡ trá»‹ HH (1-2 chá»¯ sá»‘ tháº­p lá»¥c phÃ¢n)
    
    Tráº¡ng thÃ¡i thoÃ¡t:
    Tráº£ láº¡i thÃ nh cÃ´ng náº¿u khÃ´ng gáº·p lá»—i khi ghi. Báº¡n cÃ³ thÆ° trong $_ Báº¡n cÃ³ thÆ° má»›i trong $_ [ Ä.Sá» â€¦ ] [[ BTHá»¨C ]] â€œ%câ€: cÃ¢u lá»‡nh sai â€œ%câ€: kÃ½ tá»± Ä‘á»‹nh dáº¡ng khÃ´ng há»£p lá»‡ â€œ%câ€: kÃ½ tá»± cháº¿ Ä‘á»™ kÃ½ hiá»‡u khÃ´ng há»£p lá»‡ â€œ%câ€: toÃ¡n tá»­ cháº¿ Ä‘á»™ kÃ½ hiá»‡u khÃ´ng há»£p lá»‡ â€œ%câ€: Ä‘áº·c táº£ Ä‘á»‹nh dáº¡ng thá»i gian khÃ´ng Ä‘Ãºng â€œ%sâ€: khÃ´ng thá»ƒ thÃ¡o â€œ%sâ€: tÃªn bÃ­ danh khÃ´ng há»£p lá»‡ â€œ%sâ€: tÃªn sÆ¡ Ä‘á»“ phÃ­m khÃ´ng há»£p lá»‡ â€œ%sâ€: lÃ  lá»‡nh tÃ­ch há»£p Ä‘áº·c biá»‡t â€œ%sâ€: thiáº¿u kÃ½ tá»± Ä‘á»‹nh dáº¡ng â€œ%sâ€: khÃ´ng pháº£i má»™t pid hoáº·c Ä‘áº·c táº£ cÃ´ng viá»‡c há»£p lá»‡ â€œ%sâ€: khÃ´ng pháº£i lÃ  Ä‘á»‹nh danh há»£p lá»‡ â€œ%sâ€: khÃ´ng hiá»ƒu tÃªn hÃ m cáº§n â€œ)â€ cáº§n â€œ)â€ nhÆ°ng láº¡i nháº­n Ä‘Æ°á»£c %s cáº§n â€œ:â€ cho biá»ƒu thá»©c Ä‘iá»u kiá»‡n add_process: pid %5ld (%s) Ä‘Æ°á»£c Ä‘Ã¡nh dáº¥u váº«n hoáº¡t Ä‘á»™ng add_process: tiáº¿n trÃ¬nh %5ld (%s) trong the_pipeline alias [-p] [TÃŠN[=GIÃ-TRá»Š] â€¦ ] all_local_variables: khÃ´ng cÃ³ ngá»¯ cáº£nh hÃ m á»Ÿ pháº¡m vi hiá»‡n thá»i Ä‘á»‘i sá»‘ cáº§n Ä‘á»‘i sá»‘ cáº§n há»— trá»£ biáº¿n máº£ng thá»­ gÃ¡n cho thá»© khÃ´ng pháº£i biáº¿n sai chá»‰ sá»‘ máº£ng kiá»ƒu lá»‡nh sai bá»™ káº¿t ná»‘i sai nháº£y sai sai thay tháº¿: khÃ´ng cÃ³ "â€œ" Ä‘Ã³ng trong %s sai chá»‰ sá»‘ phá»¥: khÃ´ng cÃ³ Ä‘Ã³ng â€œ%sâ€ trong %s Trang chá»§ bash: <http://www.gnu.org/software/bash/>
 bash_execute_unix_command: khÃ´ng tÃ¬m tháº¥y Ã¡nh xáº¡ phÃ­m (keymap) cho cÃ¢u lá»‡nh bg [ÄTCV â€¦] bind [-lpvsPVSX] [-m SÆ -Äá»’-PHÃM] [-f Táº¬P-TIN] [-q TÃŠN] [-u TÃŠN] [-r DÃƒY-PHÃM] [-x DÃƒY-PHÃM:Lá»†NH] [DÃƒY-PHÃM:HÃ€M-READLINE hay Lá»†NH-READLINE] khai triá»ƒn ngoáº·c Ã´m: khÃ´ng thá»ƒ phÃ¢n bá»• bá»™ nhá»› cho %s khai triá»ƒn ngoáº·c Ã´m: gáº·p lá»—i khi phÃ¢n bá»• bá»™ nhá»› cho â€œ%dâ€ pháº§n tá»­ khai triá»ƒn ngoáº·c Ã´m: gáº·p lá»—i khi phÃ¢n bá»• bá»™ nhá»› cho â€œ%sâ€ break [n] lá»—i: â€œtoken expassignâ€ sai builtin [SHELL-BUILTIN [Äá»I-Sá» â€¦]] caller [BTHá»¨C] chá»‰ cÃ³ thá»ƒ â€œreturnâ€ tá»« má»™t hÃ m hoáº·c vÄƒn lá»‡nh Ä‘Æ°á»£c â€œsourceâ€ chá»‰ cÃ³ thá»ƒ dÃ¹ng trong má»™t hÃ m khÃ´ng thá»ƒ cáº¥p phÃ¡t bá»™ mÃ´ táº£ táº­p tin má»›i cho dá»¯ liá»‡u nháº­p bash tá»« fd %d khÃ´ng thá»ƒ táº¡o táº­p tin táº¡m thá»i cho tÃ i liá»‡u nÃ y: %s khÃ´ng thá»ƒ nhÃ¢n Ä‘Ã´i fd %d thÃ nh fd %d khÃ´ng thá»ƒ nhÃ¢n Ä‘Ã´i á»‘ng dáº«n Ä‘áº·t tÃªn %s thÃ nh fd %d khÃ´ng tÃ¬m tháº¥y %s trong Ä‘á»‘i tÆ°á»£ng dÃ¹ng chung %s: %s khÃ´ng thá»ƒ táº¡o tiáº¿n trÃ¬nh con Ä‘á»ƒ thay tháº¿ lá»‡nh khÃ´ng thá»ƒ táº¡o tiáº¿n trÃ¬nh con Ä‘á»ƒ thay tháº¿ tiáº¿n trÃ¬nh khÃ´ng thá»ƒ táº¡o á»‘ng dáº«n Ä‘á»ƒ thay tháº¿ lá»‡nh khÃ´ng thá»ƒ táº¡o á»‘ng dáº«n Ä‘á»ƒ thay tháº¿ tiáº¿n trÃ¬nh khÃ´ng thá»ƒ má»Ÿ á»‘ng dáº«n Ä‘áº·t tÃªn %s Ä‘á»ƒ Ä‘á»c khÃ´ng thá»ƒ má»Ÿ á»‘ng dáº«n cÃ³ tÃªn %s Ä‘á»ƒ ghi khÃ´ng thá»ƒ má»Ÿ Ä‘á»‘i tÆ°á»£ng dÃ¹ng chung %s: %s khÃ´ng thá»ƒ chuyá»ƒn hÆ°á»›ng Ä‘áº§u vÃ o chuáº©n tá»« /dev/null: %s khÃ´ng thá»ƒ Ä‘áº·t láº¡i cháº¿ Ä‘á»™ â€œnodelayâ€ cho fd %d khÃ´ng thá»ƒ Ä‘á»“ng thá»i Ä‘áº·t vÃ  há»§y Ä‘áº·t cÃ¡c tÃ¹y chá»n há»‡ vá» khÃ´ng thá»ƒ Ä‘áº·t gid thÃ nh %d: gid chá»‹u tÃ¡c Ä‘á»™ng %d khÃ´ng thá»ƒ Ä‘áº·t nhÃ³m tiáº¿n trÃ¬nh cuá»‘i cÃ¹ng (%d) khÃ´ng thá»ƒ Ä‘áº·t uid thÃ nh %d: uid chá»‹u tÃ¡c Ä‘á»™ng %d khÃ´ng thá»ƒ há»§y Ä‘áº·t Ä‘á»“ng thá»i má»™t hÃ m VÃ€ má»™t biáº¿n khÃ´ng thá»ƒ ngÆ°ng khÃ´ng thá»ƒ ngÆ°ng há»‡ vá» Ä‘Äƒng nháº­p khÃ´ng thá»ƒ dÃ¹ng â€œ-fâ€ Ä‘á»ƒ táº¡o hÃ m chá»‰ cÃ³ thá»ƒ dÃ¹ng má»™t cá»§a nhá»¯ng tÃ¹y chá»n -anrw case Tá»ª in [MáºªU [| MáºªU]â€¦) CÃC;CÃ‚U;Lá»†NH;;]â€¦ esac cd [-L|[-P [-e]]] [-@]] [THÆ¯-Má»¤C] setpgid tiáº¿n trÃ¬nh con (%ld thÃ nh %ld) command [-pVv] Lá»†NH [Ä.Sá» â€¦] command_substitute: khÃ´ng thá»ƒ nhÃ¢n Ä‘Ã´i á»‘ng dáº«n thÃ nh fd 1 compgen [-abcdefgjksuv] [-o TÃ™Y-CHá»ŒN] [-A HÃ€NH-Äá»˜NG] [-G MáºªU-GLOB] [-W DANH-SÃCH-Tá»ª] [-F HÃ€M] [-C Lá»†NH] [-X MáºªU-Lá»ŒC] [-P TIá»€N-Tá»] [-S Háº¬U-Tá»] [Tá»ª] complete [-abcdefgjksuv] [-pr] [-DE] [-o TÃ™Y-CHá»ŒN] [-A HÃ€NH-Äá»˜NG] [-G MáºªU-GLOB] [-W DANH-SÃCH-Tá»ª]  [-F HÃ€M] [-C Lá»†NH] [-X MáºªU-Lá»ŒC] [-P TIá»€N-Tá»] [-S Háº¬U-Tá»] [TÃŠN â€¦] tá»± hoÃ n thiá»‡n: khÃ´ng tÃ¬m tháº¥y hÃ m â€œ%sâ€ compopt [-o|+o TÃ™Y-CHá»ŒN] [-DE] [TÃŠN â€¦] cáº§n toÃ¡n tá»­ hai ngÃ´i Ä‘iá»u kiá»‡n continue [n] coproc [TÃŠN] Lá»†NH [CHUYá»‚N-HÆ¯á»šNG] khÃ´ng tÃ¬m tháº¥y /tmp, hÃ£y táº¡o má»›i! cprintf: â€œ%câ€: kÃ½ tá»± Ä‘á»‹nh dáº¡ng khÃ´ng há»£p lá»‡ hiá»‡n táº¡i declare [-aAfFgilnrtux] [-p] [TÃŠN[=GIÃ-TRá»Š] â€¦] Ä‘ang xÃ³a cÃ´ng viá»‡c bá»‹ dá»«ng cháº¡y %d vá»›i nhÃ³m tiáº¿n trÃ¬nh %ld describe_pid: %ld: khÃ´ng cÃ³ pid nhÆ° váº­y ngÄƒn xáº¿p thÆ° má»¥c trá»‘ng chá»‰ sá»‘ ngÄƒn xáº¿p thÆ° má»¥c dirs [-clpv] [+N] [-N] chia cho khÃ´ng khÃ´ng cÃ³ chá»©c nÄƒng náº¡p Ä‘á»™ng echo [-n] [Ä.Sá» â€¦] echo [-neE] [Ä.Sá» â€¦] tÃªn biáº¿n máº£ng váº«n trá»‘ng enable [-a] [-dnps] [-f Táº¬P-TIN] [TÃŠN â€¦] lá»—i láº¥y cÃ¡c thuá»™c tÃ­nh thiáº¿t bá»‹ cuá»‘i: %s gáº·p lá»—i khi nháº­p vÃ o Ä‘á»‹nh nghÄ©a hÃ m cho â€œ%sâ€ lá»—i Ä‘áº·t cÃ¡c thuá»™c tÃ­nh thiáº¿t bá»‹ cuá»‘i: %s eval [Ä.Sá» â€¦] eval: vÆ°á»£t quÃ¡ má»©c Ä‘á»™ eval lá»“ng nhau tá»‘i Ä‘a (%d) exec [-cl] [-a TÃŠN] [Lá»†NH [Äá»I-Sá» â€¦]] [CHUYá»‚N-HÆ¯á»šNG â€¦] exit [n] cáº§n â€œ)â€ sá»‘ mÅ© nhá» hÆ¡n 0 export [-fn] [TÃŠN[=GIÃ-TRá»Š] â€¦] hoáº·c export -p cáº§n biá»ƒu thá»©c vÆ°á»£t quÃ¡ ngÆ°á»¡ng Ä‘á»‡ quy cá»§a biá»ƒu thá»©c fc [-e ENAME] [-lnr] [Äáº¦U] [CUá»I] hoáº·c fc -s [MáºªU=Láº¶P_Láº I] [Lá»†NH] fg [ÄTCV] bá»™ mÃ´ táº£ táº­p tin á»Ÿ ngoáº¡i pháº¡m vi cáº§n Ä‘á»‘i sá»‘ tÃªn táº­p tin for (( BTHá»¨C1; BTHá»¨C2; BTHá»¨C3 )); do CÃC;CÃ‚U;Lá»†NH; done for TÃŠN [in Tá»ªâ€¦ ;] do CÃC;CÃ‚U;Lá»†NH; done pid Ä‘Æ°á»£c tÃ¡nh nhÃ¡nh %d cÃ³ váº» Ä‘ang cháº¡y trong cÃ´ng viá»‡c %d váº¥n Ä‘á» phÃ¢n tÃ­ch cÃº phÃ¡p Ä‘á»‹nh dáº¡ng: %s free: Ä‘Ã£ Ä‘Æ°á»£c gá»i vá»›i Ä‘á»‘i sá»‘ khá»‘i Ä‘Ã£ Ä‘Æ°á»£c giáº£i phÃ³ng free: Ä‘Ã£ Ä‘Æ°á»£c gá»i vá»›i Ä‘á»‘i sá»‘ khá»‘i chÆ°a cáº¥p phÃ¡t free: kÃ­ch cá»¡ Ä‘oáº¡n Ä‘áº§u vÃ  cuá»‘i khÃ´ng trÃ¹ng free: phÃ¡t hiá»‡n sá»± trÃ n ngÆ°á»£c; mh_nbytes á»Ÿ ngoáº¡i pháº¡m vi function TÃŠN { CÃC;CÃ‚U;Lá»†NH; } or TÃŠN () { CÃC;CÃ‚U;Lá»†NH; } phiÃªn báº£n há»‡ vá» má»›i sáº½ Ã©p buá»™c Æ°á»›c lÆ°á»£ng dÆ°á»›i dáº¡ng má»™t hÃ m thay tháº¿ sá»‘ há»c getcwd: khÃ´ng thá»ƒ truy cáº­p thÆ° má»¥c cáº¥p trÃªn getopts CHUá»–I-TÃ™Y-CHá»ŒN TÃŠN [Ä.Sá»] hash [-lr] [-p ÄÆ¯á»œNG-DáºªN] [-dt] [TÃŠN â€¦] táº¯t bÄƒm help [-dms] [MáºªU â€¦] trá»£ giÃºp khÃ´ng sáºµn cÃ³ á»Ÿ phiÃªn báº£n nÃ y tÃ i liá»‡u nÃ y á»Ÿ dÃ²ng %d Ä‘á»‹nh giá»›i báº±ng káº¿t thÃºc táº­p tin (muá»‘n â€œ%sâ€) history [-c] [-d OFFSET] [n] hay history -anrw [T.TIN] hay history -ps Ä.Sá» [Ä.Sá»â€¦] vá»‹ trÃ­ lá»‹ch sá»­ Ä‘áº·c táº£ lá»‹ch sá»­ gá»£i Ã½	lá»‡nh
 cáº§n Ä‘á»‹nh danh sau tÄƒng/giáº£m dáº§n trÆ°á»›c if Lá»†NH; then CÃC;CÃ‚U;Lá»†NH; [ elif CÃC;CÃ‚U;Lá»†NH; then CÃC;CÃ‚U;Lá»†NH; ]â€¦ [ else CÃC;CÃ‚U;Lá»†NH; ] fi initialize_job_control: getpgrp bá»‹ lá»—i initialize_job_control: ká»· luáº­t dÃ²ng initialize_job_control: setpgid cÆ¡ sá»‘ (toÃ¡n há»c) khÃ´ng há»£p lá»‡ cÆ¡ sá»‘ khÃ´ng há»£p lá»‡ sai kÃ½ tá»± %d trong exportstr cho %s sá»‘ tháº­p lá»¥c khÃ´ng há»£p lá»‡ sá»‘ khÃ´ng há»£p lá»‡ sá»‘ bÃ¡t phÃ¢n khÃ´ng há»£p lá»‡ sá»‘ thá»© tá»± tÃ­n hiá»‡u khÃ´ng há»£p lá»‡ cÃ´ng viá»‡c %d Ä‘Ã£ khá»Ÿi cháº¡y mÃ  khÃ´ng cÃ³ Ä‘iá»u khiá»ƒn cÃ´ng viá»‡c ÄTCV [&] jobs [-lnprs] [ÄTCV â€¦] hoáº·c jobs -x Lá»†NH [Äá»I-Sá»] kill [-s ÄTTH | -n sá»‘_tÃ­n_hiá»‡u | -ÄTTH] pid | ÄTCV â€¦ hoáº·c kill -l [ÄTTH] lá»‡nh cuá»‘i: %s
 let Äá»I-Sá» [Äá»I-Sá» â€¦] giá»›i háº¡n dÃ²ng %d:  chÆ°a báº­t sá»­a Ä‘á»•i dÃ²ng táº£i hÃ m cho %s tráº£ vá» lá»—i nghiÃªm trá»ng (%d): nÃªn khÃ´ng Ä‘Æ°á»£c táº£i local [tÃ¹y_chá»n] TÃŠN[=GIÃ-TRá»Š] â€¦ Ä‘Äƒng xuáº¥t
 logout [n] Ä‘áº¿m vÃ²ng make_here_document: kiá»ƒu chá»‰ lá»‡nh sai %d make_local_variable: khÃ´ng cÃ³ ngá»¯ cáº£nh hÃ m á»Ÿ pháº¡m vi hiá»‡n thá»i make_redirection: chá»‰ dáº«n chuyá»ƒn hÆ°á»›ng â€œ%dâ€ náº±m ngoÃ i pháº¡m vi malloc (cáº¥p phÃ¡t bá»™ nhá»›): khá»‘i bá»™ nhá»› dÃ nh riÃªng trÃªn danh sÃ¡ch cÃ¡c khá»‘i cÃ²n trá»‘ng bá»‹ ghi vÃ o malloc: kháº³ng Ä‘á»‹nh gáº·p lá»—i: %s
 mapfile [-d delim] [-n  Sá»-LÆ¯á»¢NG] [-O Gá»C] [-s Sá»-LÆ¯á»¢NG] [-t] [-u fd] [-C Gá»ŒI-NGÆ¯á»¢C] [-c LÆ¯á»¢NG] [Máº¢NG] vÆ°á»£t quÃ¡ sá»‘ lÆ°á»£ng tÃ i-liá»‡u-Ä‘Ã¢y tá»‘i Ä‘a chuyá»ƒn tiáº¿n trÃ¬nh sang CPU khÃ¡c thiáº¿u â€œ)â€ thiáº¿u â€œ]â€ thiáº¿u chá»¯ sá»‘ tháº­p lá»¥c phÃ¢n cho \x thiáº¿u chá»¯ sá»‘ unicode cho \%c khÃ´ng há»— trá»£ thao tÃ¡c máº¡ng khÃ´ng cÃ³ â€œ=â€ trong exportstr cho %s thiáº¿u dáº¥u Ä‘Ã³ng â€œ%câ€ trong %s khÃ´ng tÃ¬m tháº¥y lá»‡nh khÃ´ng cÃ³ trá»£ giÃºp cho â€œ%sâ€. HÃ£y cháº¡y lá»‡nh â€œhelp helpâ€ hoáº·c  â€œman -k %sâ€ hay â€œinfo %sâ€. khÃ´ng cÃ³ Ä‘iá»u khiá»ƒn cÃ´ng viá»‡c khÃ´ng cÃ³ Ä‘iá»u khiá»ƒn cÃ´ng viá»‡c trong há»‡ vá» nÃ y khÃ´ng khá»›p: %s khÃ´ng cÃ³ thÆ° má»¥c khÃ¡c khÃ´ng cho phÃ©p dÃ¹ng tÃ¹y chá»n thÃªm vá»›i â€œ-xâ€ hiá»‡n thá»i khÃ´ng thá»±c thi chá»©c nÄƒng tá»± hoÃ n thiá»‡n khÃ´ng pháº£i há»‡ vá» Ä‘Äƒng nháº­p: hÃ£y dÃ¹ng lá»‡nh â€œexitâ€ sá»‘ bÃ¡t phÃ¢n chá»‰ cÃ³ nghÄ©a trong vÃ²ng láº·p â€œforâ€, â€œwhileâ€ hay â€œuntilâ€ lá»—i á»‘ng dáº«n pop_scope: Ä‘áº§u cá»§a shell_variables (cÃ¡c biáº¿n há»‡ vá») khÃ´ng pháº£i lÃ  pháº¡m vi mÃ´i trÆ°á»ng táº¡m thá»i pop_var_context: Ä‘áº§u cá»§a shell_variables (cÃ¡c biáº¿n há»‡ vá») khÃ´ng pháº£i lÃ  ngá»¯ cáº£nh hÃ m pop_var_context: khÃ´ng cÃ³ ngá»¯ cáº£nh global_variables (cÃ¡c biáº¿n toÃ n cá»¥c) popd [-n] [+N | -N] sáº¯p bá»‹ máº¥t Ä‘iá»‡n Ä‘á»™t ngá»™t print_command: bá»™ káº¿t ná»‘i sai â€œ%dâ€ printf [-v BIáº¾N] Äá»ŠNH-Dáº NG [CÃC-Äá»I-Sá»] progcomp_insert: %s: NULL COMPSPEC lá»—i láº­p trÃ¬nh pushd [-n] [+N | -N | tmá»¥c] pwd [-LP] read [-ers] [-a Máº¢NG] [-d GIá»šI-Háº N] [-i VÄ‚N-Báº¢N] [-n Sá»-KÃ-Tá»°] [-N Sá»-KÃ-Tá»°] [-p NHáº®C] [-t THá»œI-Háº N] [-u fd] [TÃŠN â€¦] lá»—i Ä‘á»c: %d: %s readarray [-n Äáº¾M] [-O Gá»C] [-s Sá»-LÆ¯á»¢NG] [-t] [-u FD] [-C Gá»ŒI-NGÆ¯á»¢C] [-c LÆ¯á»¢NG] [Máº¢NG] readonly [-aAf] [TÃŠN[=GIÃ-TRá»Š] â€¦] hay readonly -p realloc: Ä‘Ã£ Ä‘Æ°á»£c gá»i vá»›i Ä‘á»‘i sá»‘ khá»‘i chÆ°a cáº¥p phÃ¡t realloc: kÃ­ch cá»¡ Ä‘oáº¡n Ä‘áº§u vÃ  cuá»‘i khÃ´ng trÃ¹ng realloc: phÃ¡t hiá»‡n sá»± trÃ n ngÆ°á»£c; mh_nbytes náº±m ngoÃ i pháº¡m vi cho phÃ©p trÃ n ngÆ°á»£c ngÄƒn xáº¿p Ä‘á»‡ quy lá»—i chuyá»ƒn hÆ°á»›ng: khÃ´ng thá»ƒ nhÃ¢n Ä‘Ã´i fd register_alloc: %p Ä‘Ã£ cÃ³ trong báº£ng nhÆ° Ä‘Æ°á»£c cáº¥p phÃ¡t?
 register_alloc: báº£ng cáº¥p phÃ¡t Ä‘áº§y vá»›i FIND_ALLOC?
 register_free: %p Ä‘Ã£ cÃ³ trong báº£ng nhÆ° cÃ²n trá»‘ng?
 bá»‹ háº¡n cháº¿ return [n] run_pending_traps: giÃ¡ trá»‹ sai trong danh sÃ¡ch trap_list[%d]: %p run_pending_traps: bá»™ xá»­ lÃ½ tÃ­n hiá»‡u lÃ  SIG_DFL, Ä‘ang gá»­i láº¡i %d (%s) cho chÃ­nh mÃ¬nh save_bash_input: Ä‘Ã£ cÃ³ bá»™ Ä‘á»‡m cho fd má»›i %d select TÃŠN [in CÃC Tá»ª â€¦ ;] do CÃC;CÃ‚U;Lá»†NH; done set [-abefhkmnptuvxBCHP] [-o TÃŠN-TÃ™Y-CHá»ŒN] [--] [Äá»I-Sá» â€¦] setlocale: %s: khÃ´ng thá»ƒ chuyá»ƒn Ä‘á»•i miá»n Ä‘á»‹a phÆ°Æ¡ng (%s) setlocale: %s: khÃ´ng thá»ƒ chuyá»ƒn Ä‘á»•i miá»n Ä‘á»‹a phÆ°Æ¡ng (%s): %s setlocale: LC_ALL: khÃ´ng thá»ƒ chuyá»ƒn Ä‘á»•i miá»n Ä‘á»‹a phÆ°Æ¡ng (%s) setlocale: LC_ALL: khÃ´ng thá»ƒ chuyá»ƒn Ä‘á»•i miá»n Ä‘á»‹a phÆ°Æ¡ng (%s): %s cáº¥p há»‡ vá» (%d) quÃ¡ cao nÃªn Ä‘áº·t láº¡i thÃ nh 1 shift [n] sá»‘ lÆ°á»£ng dá»‹ch shopt [-pqsu] [-o] [tÃªn-tÃ¹y-chá»n â€¦] sigprocmask: %d: thao tÃ¡c khÃ´ng há»£p lá»‡ source Táº¬P-TIN [Äá»I-Sá» â€¦] start_pipeline: pgrp pipe suspend [-f] lá»—i cÃº phÃ¡p gáº·p lá»—i cÃº phÃ¡p trong biá»ƒu thá»©c Ä‘iá»u kiá»‡n gáº·p lá»—i cÃº phÃ¡p trong biá»ƒu thá»©c Ä‘iá»u kiá»‡n: tháº» bÃ i báº¥t thÆ°á»ng â€œ%sâ€ lá»—i cÃº phÃ¡p trong biá»ƒu thá»©c lá»—i cÃº phÃ¡p á»Ÿ gáº§n â€œ%sâ€ cÃ³ lá»—i cÃº phÃ¡p á»Ÿ gáº§n tháº» bÃ i báº¥t thÆ°á»ng â€œ%sâ€ lá»—i cÃº phÃ¡p: â€œ((%s))â€ lá»—i cÃº phÃ¡p: gáº·p dáº¥u cháº¥m pháº©y â€œ;â€ báº¥t thÆ°á»ng lá»—i cÃº phÃ¡p: cáº§n biá»ƒu thá»©c sá»‘ há»c lá»—i cÃº phÃ¡p: toÃ¡n tá»­ sá»‘ há»c khÃ´ng há»£p lá»‡ lá»—i cÃº phÃ¡p: cáº§n toÃ¡n háº¡ng lá»—i cÃº phÃ¡p: káº¿t thÃºc táº­p tin báº¥t thÆ°á»ng há»‡ thá»‘ng sáº¯p sá»¥p Ä‘á»• test [BTHá»¨C] time [-p] á»NG-DáºªN quÃ¡ nhiá»u Ä‘á»‘i sá»‘ trap [-lp] [[Ä.Sá»] ÄTTH â€¦] trap_handler: tÃ­n hiá»‡u sai %d type [-afptP] TÃŠN [TÃŠN â€¦] typeset [-aAfFgilnrtux] [-p] TÃŠN[=GIÃ-TRá»Š] â€¦ ulimit [-SHabcdefiklmnpqrstuvxPT] [GIá»šI-Háº N] umask [-p] [-S] [CHáº¾-Äá»˜] unalias [-a] TÃŠN [TÃŠN â€¦] gáº·p káº¿t thÃºc táº­p tin báº¥t thÆ°á»ng trong khi tÃ¬m â€œ]]â€ gáº·p káº¿t thÃºc táº­p tin báº¥t thÆ°á»ng trong khi tÃ¬m â€œ%câ€ tÆ°Æ¡ng á»©ng gáº·p káº¿t thÃºc táº­p tin báº¥t thÆ°á»ng trong khi tÃ¬m â€œ)â€ tÆ°Æ¡ng á»©ng Ä‘á»‘i sá»‘ báº¥t thÆ°á»ng â€œ%sâ€ cho toÃ¡n tá»­ hai ngÃ´i Ä‘iá»u kiá»‡n Ä‘á»‘i sá»‘ báº¥t thÆ°á»ng â€œ%sâ€ cho toÃ¡n tá»­ má»™t ngÃ´i Ä‘iá»u kiá»‡n Ä‘á»‘i sá»‘ báº¥t thÆ°á»ng cho toÃ¡n tá»­ hai ngÃ´i Ä‘iá»u kiá»‡n Ä‘á»‘i sá»‘ báº¥t thÆ°á»ng cho toÃ¡n tá»­ má»™t ngÃ´i Ä‘iá»u kiá»‡n gáº·p tháº» bÃ i báº¥t thÆ°á»ng â€œ%dâ€ trong cÃ¢u lá»‡nh Ä‘iá»u kiá»‡n gáº·p tháº» bÃ i báº¥t thÆ°á»ng â€œ%câ€ trong cÃ¢u lá»‡nh Ä‘iá»u kiá»‡n gáº·p tháº» bÃ i báº¥t thÆ°á»ng â€œ%sâ€ trong cÃ¢u lá»‡nh Ä‘iá»u kiá»‡n tháº» bÃ i báº¥t thÆ°á»ng â€œ%sâ€, cáº§n toÃ¡n tá»­ hai ngÃ´i Ä‘iá»u kiá»‡n gáº·p tháº» bÃ i báº¥t thÆ°á»ng â€œ%sâ€, cáº§n â€œ)â€ khÃ´ng rÃµ lá»—i lá»‡nh khÃ´ng rÃµ unset [-f] [-v] [-n] [TÃŠN â€¦] until CÃC;CÃ‚U;Lá»†NH; do CÃC;CÃ‚U;Lá»†NH; done cÆ¡ sá»‘ cÃ³ giÃ¡ trá»‹ quÃ¡ lá»›n biáº¿n â€” tÃªn vÃ  nghÄ©a cá»§a má»™t sá»‘ biáº¿n há»‡ vá» wait [-n] [id â€¦] wait [pid â€¦] wait: pid %ld khÃ´ng pháº£i lÃ  tiáº¿n trÃ¬nh con cá»§a há»‡ vá» nÃ y wait_for: KhÃ´ng cÃ³ má»¥c ghi vá» tiáº¿n trÃ¬nh %ld wait_for_job: cÃ´ng viá»‡c %d bá»‹ dá»«ng cháº¡y waitchld: Ä‘ang báº­t WNOHANG Ä‘á»ƒ trÃ¡nh bá»‹ cháº·n vÃ´ háº¡n cáº£nh bÃ¡o:  cáº£nh bÃ¡o: %s: %s cáº£nh bÃ¡o: tÃ¹y chá»n â€œ-Câ€ cÃ³ thá»ƒ khÃ´ng hoáº¡t Ä‘á»™ng nhÆ° báº¡n mong Ä‘á»£i cáº£nh bÃ¡o: tÃ¹y chá»n â€œ-Fâ€ cÃ³ thá»ƒ khÃ´ng hoáº¡t Ä‘á»™ng nhÆ° mong Ä‘á»£i while CÃC;CÃ‚U;Lá»†NH; do CÃC;CÃ‚U;Lá»†NH; done lá»—i ghi: %s xtrace fd (%d) != fileno xtrace fp (%d) xtrace_set: %d: sai bá»™ mÃ´ táº£ táº­p tin xtrace_set: con trá» táº­p tin NULL { CÃC;CÃ‚U;Lá»†NH ; } 