cksum(1) on OpenBSD
The text e260f1d8d37b, as OpenBSD 6.0, OpenBSD 5.9, OpenBSD 5.8, OpenBSD 5.7, OpenBSD 5.6 shipped it.
display file checksums and block counts
Flags it lists
-
-C -
-a -
-b -
-c -
-h -
-p -
-q -
-r -
-s -
-t -
-x