dump(8) on Linux
The text 8bc6a8fe4270, as Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it.
ext2/3/4 filesystem backup
Flags it lists
-
-M -
-S -
-W -
-a -
-c -
-k -
-level# -
-m -
-n -
-q -
-u -
-v -
-w -
-y