tcpstat(1) on Linux
The text 7a09e2e202c7, as Debian 4.0 (Etch), Debian 3.1 (Sarge), Debian 3.0 (Woody) shipped it.
report network interface statistics
Flags it lists
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-? -
-B -
-F -
-R -
-a -
-b -
-e -
-h -
-i -
-l -
-o -
-p -
-r -
-s