beacon(8) on Linux
The text 36cde5699ef6, as Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.
transmit periodic messages on an AX.25 port.
Flags it lists
-
-c -
-d -
-l -
-m -
-s -
-t -
-v