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look




DESCRIPTION

     The look utility displays any lines in file which contain string as a
     prefix.  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.

     Options:

     -d      Dictionary character set and order, i.e. only alphanumeric char­
             acters are compared.

     -f      Ignore the case of alphabetic characters.

     -a      Use the alternate dictionary /usr/share/dict/web2

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

     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.


FILES

     /usr/share/dict/words  the dictionary
     /usr/share/dict/web2   the alternate dictionary


SEE ALSO

     grep(1), sort(1)


COMPATIBILITY

     The original manual page stated that tabs and blank characters partici­
     pated in comparisons when the -d option was specified.  This was incor­
     rect and the current man page matches the historic implementation.


HISTORY

     Look appeared in Version 7 AT&T Unix.

BSD                              June 14, 1993                             BSD
  




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