grub-mkdevicemap --version (return code: 0)
grub-mkdevicemap (GRUB) 2.02~beta2-36ubuntu3.7
grub-mkdevicemap --help (return code: 0)
Usage: grub-mkdevicemap [OPTION]...
Generate a device map file automatically.
-n, --no-floppy do not probe any floppy drive
-s, --probe-second-floppy probe the second floppy drive
-m, --device-map=FILE use FILE as the device map [default=/boot/grub/device.map]
-h, --help display this message and exit
-V, --version print version information and exit
-v, --verbose print verbose messages
Report bugs to <bug-grub@gnu.org>.