Manual: grub-fstest

GRUB-FSTEST(1)						User Commands					      GRUB-FSTEST(1)

NAME
       grub-fstest - debug tool for GRUB filesystem drivers

SYNOPSIS
       grub-fstest [OPTION...] IMAGE_PATH COMMANDS

DESCRIPTION
       Debug tool for filesystem driver.

	      Commands:

       blocklist FILE
	      Display blocklist of FILE.

       cat FILE
	      Copy FILE to standard output.

       cmp FILE LOCAL
	      Compare FILE with local file LOCAL.

       cp FILE LOCAL
	      Copy FILE to local file LOCAL.

       crc FILE
	      Get crc32 checksum of FILE.

       hex FILE
	      Show contents of FILE in hex.

       ls PATH
	      List files in PATH.

       xnu_uuid DEVICE
	      Compute XNU UUID of the device.

       zfs-bootfs ZFS_DATASET
	      Compute ZFS dataset bootpath.

       -c, --diskcount=NUM
	      Specify the number of input files.

       -C, --crypto
	      Mount crypto devices.

       -d, --debug=STRING
	      Set debug environment variable.

       -K, --zfs-key=FILE|prompt
	      Load zfs crypto key.

       -n, --length=NUM
	      Handle N bytes in output file.

       -r, --root=DEVICE_NAME
	      Set root device.

       -s, --skip=NUM
	      Skip N bytes from output file.

       -u, --uncompress
	      Uncompress data.

       -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.

SEE ALSO
       grub-probe(8)

       The  full  documentation for grub-fstest is maintained as a Texinfo manual.  If the info and grub-fstest programs are
       properly installed at your site, the command

	      info grub-fstest

       should give you access to the complete manual.

GRUB 2.14-2ubuntu2					 March 2026					      GRUB-FSTEST(1)