Hexdump the content of a disk over NBD:

    nbddump [ OPTIONS ...] NBD-URI | [ CMD ARGS ... ]

Options include:
    --color, --colour     Force ANSI color on output to non-terminal
    --no-color, --no-colour
                          Suppress ANSI color even on output to terminal
    -n LEN, --length=LEN  Truncate output after LEN bytes dumped
    -o OFF, --offset=OFF  Skip to offset OFF bytes before dumping

Other options:

    nbddump --help
    nbddump --version

Examples:

    nbddump nbd://localhost
    nbddump -- [ qemu-nbd -r -f qcow2 file.qcow2 ]

Please read the nbddump(1) manual page for full usage.