LOOK(1) LOOK(1) look - look [] - [] look - . look ( sort(1) -d / -f look). /usr/share/dict/words . -a --alternative . -d --alphanum . . sort -d 2.28. -f --ignore-case . . -t --terminate - ( ). -h --help . -V --version . look 0 1 1 . WORDLIST . FILES. /usr/share/dict/words /usr/share/dict/web2 look AT&T Unix. sort -d /etc/passwd -o /tmp/look.dict look -t: root:foobar /tmp/look.dict grep(1) sort(1) . look util-linux . util-linux 2.42.1 2026-05-18 LOOK(1)