pstree(1) on Linux
The text 98e17df03823, as Debian 3.0 (Woody), Debian 2.2 (Potato) shipped it.
display a tree of processes
Flags it lists
-
-G -
-H -
-U -
-V -
-a -
-c -
-h -
-l -
-n -
-p -
-u