tomb(1) on Linux
The text cdb7f9ede7f2, as Debian 10 (Buster) shipped it.
the Crypto Undertaker
Flags it lists
-
--kdf -
-D -
-f -
-g -
-h -
-k -
-n -
-o -
-p -
-q -
-r -
-s -
-v