look(1)

NAME
     look - find lines in a sorted list

SYNOPSIS
     look [-df] string [file]

DESCRIPTION
     Look consults a sorted file and prints all lines that begin with  string.
     It  uses  binary  search.  The options -d and -f affect comparisons as in
     sort(1).  If no file is specified, /usr/lib/dict/words  is  assumed  with
     collating sequence -df.

OPTIONS

     -d   Dictionary order: compare letters, digits and whitespace.

     -f   Fold. Upper case letters compare equal to lower case.

FILES

     /usr/lib/dict/words      Sorted list of English words.

SEE ALSO
     sort(1), spell(1).

AUTHOR
     Kees J. Bot (kjb@cs.vu.nl)