Display lines beginning with a prefix in a sorted file. See also:
grep
,sort
. More information: https://man.freebsd.org/cgi/man.cgi?look.
look prefix path/to/file
look -f|-ignore-case -d|-alphanum prefix path/to/file
look -t|-terminate ,
/usr/share/dict/words
(--ignore-case
and --alphanum
are assumed):look prefix