efsu(1) on Linux
The text 671c42a96c79, as Debian 13 (Trixie), Debian 12 (Bookworm) shipped it. The page shows this text now.
Ethernet Frame Send Utility
Flags it lists
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-d -
-e -
-h -
-i -
-l -
-p -
-t -
-v -
-w