bpfmon(8) on Linux
The text bff9d0a33ada, as Debian 13 (Trixie) shipped it. The page shows this text now.
BPF based visual packet rate monitor
Flags it lists
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-I -
-L -
-N -
-a -
-h -
-i -
-l -
-t -
-u -
-v -
-z