sha1(1) on FreeBSD

The text 44b2a3da403e, as FreeBSD 7.0-RELEASE, FreeBSD 6.3-RELEASE, FreeBSD 6.2-RELEASE, FreeBSD 6.1-RELEASE, FreeBSD 6.0-RELEASE shipped it.

calculate a message-digest fingerprint (checksum) for a file

Flags it lists