has the specified label.

       -l, --show-labels
           Add the labels in the mount output. mount must have permission to
           read the disk device (e.g. be set-user-ID root) for this to work.
           One can set such a label for ext2, ext3 or ext4 using the e2label(8)
           utility, or for XFS using xfs_admin(8), or for reiserfs using
           reiserfstune(8).

       -M, --move
           Move a subtree to some other place. See above, the subsection The
           move operation.

       -m, --mkdir[=mode]
           Allow to make a target directory (mountpoint) if it does not exist
           yet. Alias to "-o X-mount.mkdir[=mode]", the default mode is 0755.
           For more details see X-mount.mkdir below.

       -n, --no-mtab
           Mount without writing in /etc/mtab. This is necessary for example
           when /etc is on a read-only filesystem.

       -N, --namespace ns
           Perform the mount operation in the mount namespace specified by ns.
           ns is either PID of process running in that namespace or special
           file representing that namespace.

           mount switches to the mount namespace when it reads /etc/fstab,
           writes /etc/mtab: (or writes to _/run/mount) and calls mount(2),
           otherwise it runs in the original mount namespace. This means that
           the target namespace does not have to contain any libraries or other
           requirements necessary to execute the mount(2) call.

           See mount_namespaces(7) for more information.

       -O, --test-opts opts
           Limit the set of filesystems to which the -a option applies. In this
           regard it is like the -t option except that -O is useless without
           -a. For example, the command

           mount -a -O no_netdev

           mounts all filesystems except those which have the option netdev
           specified in the options field in the /etc/fstab file.

           It is different from -t in that each option is matched exactly; a
           leading no at the beginning of one option does not negate the rest.

           The -t and -O options are cumulative in effect; that is, the command

           mount -a -t ext2 -O  _netdev

           mounts all ext2 filesystems with the _netdev option, not all
           filesystems that are either ext2 or have the _netdev option
           specified.

       -o, --options opts
           Use the specified mount options. The opts argument is a
           comma-separated list. For example:

           mount LABEL=mydisk -o noatime,nodev,nosuid

           Note that the order of the options matters, as the last option wins
           if there are conflicting ones. The options from the command line
           also overwrite options from fstab by default.

           For more details, see the FILESYSTEM-INDEPENDENT MOUNT OPTIONS and
           FILESYSTEM-SPECIFIC MOUNT OPTIONS sections.

       --onlyonce
           Forces mount command to check if the filesystem is already mounted.
           This behavior is the default for --all; otherwise, it depends on the
           kernel filesystem driver. Some filesystems may be mounted more than
           once on the same mount point (e.g. tmpfs).

       --options-mode mode
           Controls how to combine options from fstab/mtab with options from
           the command line. mode can be one of ignore, append, prepend or
           replace. For example, append means that options from fstab are
           appended to options from the command line. The default value is
           prepend — it means command line options are evaluated after fstab
           options. Note that the last option wins if there are conflicting
           ones.

       --options-source source
           Source of default options. source is a comma-separated list of
           fstab, mtab and disable. disable disables fstab and mtab and enables
           --options-source-force. The default value is fstab,mtab.