grub-mount
Mount a filesystem or filesystem image read-only using GRUB's filesystem drivers. tldr-pages
On Linux
Linux
Mount a block device or filesystem image to a mount point
grub-mount /dev/sdXY /mntIdentifyMount an entire disk image's second partition, -r specifies the partition number in the image
grub-mount --root 2 disk.img /mntIdentifyMount an encrypted device and prompt for a passphrase
grub-mount --crypto /dev/sdXY /mntIdentifyLoad a ZFS encryption key from a file
grub-mount --zfs-key /path/to/zfs.key /dev/sdX /mntIdentifyShow debugging output for a matching category
grub-mount --debug string image /mntIdentifyEnable verbose output
grub-mount --verbose image /mntIdentifyDisplay help
grub-mount --helpIdentifyDisplay version
grub-mount --versionIdentify