Documentation made easier
grub-mount − export GRUB filesystem with FUSE
grub-mount [OPTION...] IMAGE1 [IMAGE2 ...] MOUNTPOINT
Debug tool for
filesystem driver.
−C, −−crypto
Mount crypto devices.
−d, −−debug=STRING
Set debug environment variable.
−K, −−zfs−key=FILE|prompt
Load zfs crypto key.
−r, −−root=DEVICE_NAME
Set root device.
−v, −−verbose
print verbose messages.
−?, −−help
give this help list
−−usage
give a short usage message
−V, −−version
print program version
Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options.
The full documentation for grub-mount is maintained as a Texinfo manual. If the info and grub-mount programs are properly installed at your site, the command
info grub-mount
should give you access to the complete manual.