LOOK(1) LOOK(1) (NAME) look - (SYNOPSIS) look [options] string [file] (DESCRIPTION) look file string . look file ( sort(1) -d / -f look ). file /usr/share/dict/words . (OPTIONS) -a, --alternative . -d, --alphanum . . . sort -d . -f, --ignore-case . . -t, --terminate character string character ( ) . -h, --help . -V, --version . (EXIT STATUS) look 0 1 1 . (ENVIRONMENT) WORDLIST . (FILES) . (FILES) /usr/share/dict/words /usr/share/dict/web2 (HISTORY) look Version 7 AT&T Unix . (EXAMPLES) sort -d /etc/passwd -o /tmp/look.dict look -t: root:foobar /tmp/look.dict (SEE ALSO) grep(1), sort(1) (REPORTING BUGS) . (AVAILABILITY) look util-linux . . util-linux 2.42.3 2026-09-02 LOOK(1)