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LOOK(1)				 User Commands			       LOOK(1)

       look - display lines beginning with a given string

       look [options] string [file]

       The  look  utility displays any lines in file which contain string.  As
       look performs a binary search, the lines in file must be sorted	(where
       sort(1) got the same options -d and/or -f that look is invoked with).

       If  file is not specified, the file /usr/share/dict/words is used, only
       alphanumeric characters are compared and the case of alphabetic charac‐
       ters is ignored.

       -a, --alternative
	      Use the alternative dictionary file.

       -d, --alphanum
	      Use  normal  dictionary  character  set  and  order,  i.e.  only
	      alphanumeric characters are compared.  (This is on by default if
	      no file is specified.)

       -f, --ignore-case
	      Ignore  the  case	 of  alphabetic	 characters.   (This  is on by
	      default if no file is specified.)

       -t, --terminate character
	      Specify a string termination character, i.e. only the characters
	      in  string up to and including the first occurrence of character
	      are compared.

       -h, --help
	      Display help text and exit.

       -V, --version
	      Display version information and exit.

       The look utility exits 0 if one or more lines were found and displayed,
       1 if no lines were found, and >1 if an error occurred.

	      sort -d /etc/passwd -o /tmp/look.dict
	      look -t: root:foobar /tmp/look.dict

	   the dictionary

	   the alternative dictionary

       grep(1), sort(1)

       The original manual page stated that tabs and blank characters partici‐
       pated in comparisons when the alphanum option was specified.  This  was
       incorrect,  and	the  current man page matches the historic implementa‐

       The look utility appeared in Version 7 AT&T Unix.

       The look command is part of the util-linux  package  and	 is  available
       from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

util-linux			   June 2011			       LOOK(1)

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