fstrim(8) on Linux
The text 272845e081a3, as Debian 8 (Jessie) shipped it.
discard unused blocks on a mounted filesystem
Flags it lists
-
--all -
--help -
--length -
--minimum -
--offset -
--verbose -
--version -
-V -
-a -
-h -
-l -
-m -
-o -
-v