sem(1) on Linux
The text 345d9005c996, as Debian 11 (Bullseye), Debian 10 (Buster) shipped it.
semaphore for executing shell command lines in parallel
Flags it lists
-
--bg -
--fg -
--id -
--jobs -
--max-procs -
--semaphorename -
--semaphoretimeout -
--st -
--wait -
-N -
-P -
-j