nfreplay(1) on Linux
The text d1f52a775a95, as Debian 13 (Trixie) shipped it. The page shows this text now.
replay binary flow files as netflow version v5 or v9 to a remote host
Flags it lists
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-4 -
-6 -
-B -
-H -
-S -
-V -
-c -
-h -
-j -
-p -
-r -
-u -
-v -
-z