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LOOK(1) BSD General Commands Manual LOOK(1)
look -- display lines beginning with a given string
look [-df] [-t termchar] string [file ...]
The look utility displays any lines in file which contain string as a prefix. As look per-
forms a binary search, the lines in file must be sorted.
If file is not specified, the file /usr/share/dict/words is used, only alphanumeric charac-
ters are compared and the case of alphabetic characters is ignored.
-d Dictionary character set and order, i.e. only alphanumeric characters are compared.
-f Ignore the case of alphabetic characters.
-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.
/usr/share/dict/words the dictionary
The original manual page stated that tabs and blank characters participated in comparisons
when the -d option was specified. This was incorrect and the current man page matches the
A look utility appeared in Version 7 AT&T UNIX.
BSD June 14, 1993 BSD
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