blkdiscard(8) on Linux
The text 190931b350c0, as Debian 9 (Stretch) shipped it.
discard sectors on a device
Flags it lists
-
--help -
--length -
--offset -
--secure -
--step -
--verbose -
--version -
--zeroout -
-V -
-h -
-l -
-o -
-p -
-s -
-v -
-z