mkfs.cramfs(8) on Linux
The text 5a265d07255e, as Debian 11 (Bullseye) shipped it.
make compressed ROM file system
Flags it lists
-
--help -
--version -
-E -
-V -
-b -
-e -
-h -
-i -
-n -
-p -
-s -
-v -
-z