ftpd(8) on Linux
The text 1a9a11134d33, as Debian 5.0 (Lenny), Debian 4.0 (Etch) shipped it.
DARPA Internet File Transfer Protocol server
Flags it lists
-
-A -
-C -
-E -
-T -
-U -
-a -
-c -
-d -
-l -
-p -
-r -
-s -
-t -
-u -
-v -
-w