mheard(1) on Linux
The text bf1ada862537, as Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge), Debian 3.0 (Woody), Debian 2.2 (Potato), Debian 2.1 (Slink), Debian 2.0 (Hamm) shipped it.
display AX.25 calls recently heard.
Flags it lists
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-d -
-n -
-o -
-v