NAME

look — display lines beginning with a given string

SYNOPSIS

look	[-df] [-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.

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

Options:

-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.

FILES

/usr/share/dict/words

the dictionary

COMPATIBILITY

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 historic implementation.

SEE ALSO

grep(1), sort(1)

HISTORY

look appeared in Version 7 AT&T UNIX.