ibportstate(8) on Linux
The text 168d13342da7, as Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
handle port (physical) state and link speed of an InfiniBand port
Flags it lists
-
--m_key -
--show_keys -
--verbose -
-K -
-d -
-e -
-v -
-y