hfkernel(1) on Linux
The text 0f51b3f5eaab, as Debian 3.1 (Sarge) shipped it.
HF (shortwave radio) protocol implementation using a soundcard
Flags it lists
-
-2 -
-3 -
-M -
-R -
-a -
-c -
-f -
-h -
-i -
-k -
-l -
-m -
-n -
-p -
-r -
-s -
-t