nbddiscard(1) LIBNBD nbddiscard(1) (NAME) nbddiscard, nbdzero - (NBD) (SYNOPSIS) nbddiscard [-c|--check] [-z|--zero] [--fast-zero] [-q|--quiet] [-v|--verbose] [-y|--yes] [-o|--offset OFFSET] [-l|--length LENGTH] NBD-URI nbddiscard -V|--version nbddiscard -h|--help nbdzero [-c|--check] [--fast-zero] [-q|--quiet] [-v|--verbose] [-y|--yes] [-o|--offset OFFSET] [-l|--length LENGTH] NBD-URI nbdzero -V|--version nbdzero -h|--help (DESCRIPTION) nbddiscard (NBD) (discard ). (sparse) . NBD 10809 : $ nbddiscard nbd://localhost PERMANENTLY ERASE everything on nbd://localhost bytes 0 - 1073741823 (y/N)? y nbdzero . (PERMANENTLY ERASED). URI NBD nbd_connect_uri(3) . (OPTIONS) -c --check (sparse) -z . --fast-zero ( nbd_can_fast_zero(3) ) --zero . . -h --help . -l LENGTH --length LENGTH LENGTH . "K" "M" . -o OFFSET --offset OFFSET . "K" "M" . -q --quiet . -v --verbose libnbd. "LIBNBD_DEBUG=1" . -V --version . -y --yes (yes) . . . -z --zero . nbdzero nbddiscard -z . (SEE ALSO) libnbd(3), libnbd-python(3), nbd_connect_uri(3), nbdcopy(1), nbddump(1), nbdfuse(1), nbdinfo(1), nbdsh(1), nbdublk(1), blkdiscard(8), qemu-img(1). (AUTHORS) Richard W.M. Jones (COPYRIGHT) Red Hat (LICENSE) << >> (GNU Lesser General Public License) (Free Software Foundation) ( ) / . . (GNU Lesser General Public License) . : Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA libnbd-1.24.3 2026-07-16 nbddiscard(1)