ttylinkd(8) on Linux
The text cd3b783ed3f6, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye) shipped it. The page shows this text now.
TTYlink daemon for AX.25, NET/ROM, ROSE and IP.
Flags it lists
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-c -
-f -
-h -
-v