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.