ra(1) on Linux
The text 5ca0644d4fe9, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it.
read argus(8) data.
Flags it lists
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-A -
-D -
-E -
-F -
-H -
-L -
-S -
-T -
-X -
-Z -
-b -
-c -
-d -
-e -
-h -
-n -
-p -
-q -
-t -
-u -
-z