procinfo(8) on Linux
The text 75ec711ba63b, as Debian 2.1 (Slink), Debian 2.0 (Hamm), Debian 1.3 (Bo), Debian 1.2 (Rex), Debian 1.1 (Buzz) shipped it.
display system status gathered from /proc
Flags it lists
-
-D -
-F -
-a -
-b -
-d -
-f -
-h -
-m -
-n -
-v