raddebug(8) on Linux
The text b2a9db58bb0a, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye) shipped it.
Display debugging output from a running server.
Flags it lists
-
-I -
-c -
-f -
-i -
-n -
-t -
-u