radtest(1) on Linux
The text 215a5fd0d827, as Debian 4.0 (Etch) shipped it.
RADIUS server test program
Flags it lists
-
-a -
-d -
-f -
-g -
-h -
-i -
-l -
-n -
-p -
-r -
-s -
-v -
-x