clockprobe(8) on Linux
The text 0c0c74289752, as Debian 4.0 (Etch), Debian 3.1 (Sarge), Debian 3.0 (Woody), Debian 2.2 (Potato) shipped it.
Flags it lists
-
-T -
-X -
-b -
-c -
-d -
-h -
-n -
-p -
-r -
-v -
-x