umount.crypt(8) on Linux
The text 3c61d79e8182, as Arch Linux 2026-11-01, Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it. The page shows this text now.
unmount a dm-crypt encrypted volume
Flags it lists
-
-f -
-n -
-r