mkfs.jfs(8) on Linux
The text c71d5e6467a9, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it.
create a JFS formatted partition
Flags it lists
-
-O -
-V -
-c -
-q