nfcapd(1) on Linux
The text 5fbacdfa0b0d, as Debian 9 (Stretch) shipped it.
netflow capture daemon
Flags it lists
-
-4 -
-6 -
-B -
-D -
-E -
-J -
-P -
-R -
-S -
-V -
-X -
-b -
-e -
-f -
-g -
-h -
-j -
-n -
-p -
-s -
-t -
-u -
-w -
-x -
-z