Whereis
From FreeBSDwiki
Very much like where except that it will search for any program and show you not only where the program itself is, but also where any source code and/or man pages related to that program are in the standard path:
samizdata# whereis time time: /usr/bin/time /usr/share/man/man1/time.1.gz /usr/src/usr.bin/time samizdata#
