NAME
   look - display lines beginning with a given string

SYNOPSIS
   look [-dfa] [-t termchar] string [file]

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.