Provided by: systemd_251.4-1ubuntu7_amd64 bug


       systemd-mount, systemd-umount - Establish and destroy transient mount or auto-mount points


       systemd-mount [OPTIONS...] WHAT [WHERE]

       systemd-mount [OPTIONS...] --list

       systemd-mount [OPTIONS...] --umount WHAT|WHERE...


       systemd-mount may be used to create and start a transient .mount or .automount unit of the
       file system WHAT on the mount point WHERE.

       In many ways, systemd-mount is similar to the lower-level mount(8) command, however
       instead of executing the mount operation directly and immediately, systemd-mount schedules
       it through the service manager job queue, so that it may pull in further dependencies
       (such as parent mounts, or a file system checker to execute a priori), and may make use of
       the auto-mounting logic.

       The command takes either one or two arguments. If only one argument is specified it should
       refer to a block device or regular file containing a file system (e.g.  "/dev/sdb1" or
       "/path/to/disk.img"). The block device or image file is then probed for a file system
       label and other metadata, and is mounted to a directory below /run/media/system/ whose
       name is generated from the file system label. In this mode the block device or image file
       must exist at the time of invocation of the command, so that it may be probed. If the
       device is found to be a removable block device (e.g. a USB stick), an automount point is
       created instead of a regular mount point (i.e. the --automount= option is implied, see

       If two arguments are specified, the first indicates the mount source (the WHAT) and the
       second indicates the path to mount it on (the WHERE). In this mode no probing of the
       source is attempted, and a backing device node doesn't have to exist. However, if this
       mode is combined with --discover, device node probing for additional metadata is enabled,
       and – much like in the single-argument case discussed above – the specified device has to
       exist at the time of invocation of the command.

       Use the --list command to show a terse table of all local, known block devices with file
       systems that may be mounted with this command.

       systemd-umount can be used to unmount a mount or automount point. It is the same as
       systemd-mount --umount.


       The following options are understood:

           Do not synchronously wait for the requested operation to finish. If this is not
           specified, the job will be verified, enqueued and systemd-mount will wait until the
           mount or automount unit's start-up is completed. By passing this argument, it is only
           verified and enqueued.

       -l, --full
           Do not ellipsize the output when --list is specified.

           Do not pipe output into a pager.

           Do not print the legend, i.e. column headers and the footer with hints.

           Do not query the user for authentication for privileged operations.

       --quiet, -q
           Suppresses additional informational output while running.

           Enable probing of the mount source. This switch is implied if a single argument is
           specified on the command line. If passed, additional metadata is read from the device
           to enhance the unit to create. For example, a descriptive string for the transient
           units is generated from the file system label and device model. Moreover if a
           removable block device (e.g. USB stick) is detected an automount unit instead of a
           regular mount unit is created, with a short idle timeout, in order to ensure the
           file-system is placed in a clean state quickly after each access.

       --type=, -t
           Specifies the file system type to mount (e.g.  "vfat" or "ext4"). If omitted or set to
           "auto", the file system type is determined automatically.

       --options=, -o
           Additional mount options for the mount point.

           Let the specified user USER own the mounted file system. This is done by appending
           uid= and gid= options to the list of mount options. Only certain file systems support
           this option.

           Takes a boolean argument, defaults to on. Controls whether to run a file system check
           immediately before the mount operation. In the automount case (see --automount= below)
           the check will be run the moment the first access to the device is made, which might
           slightly delay the access.

           Provide a description for the mount or automount unit. See Description= in

       --property=, -p
           Sets a unit property for the mount unit that is created. This takes an assignment in
           the same format as systemctl(1)'s set-property command.

           Takes a boolean argument. Controls whether to create an automount point or a regular
           mount point. If true an automount point is created that is backed by the actual file
           system at the time of first access. If false a plain mount point is created that is
           backed by the actual file system immediately. Automount points have the benefit that
           the file system stays unmounted and hence in clean state until it is first accessed.
           In automount mode the --timeout-idle-sec= switch (see below) may be used to ensure the
           mount point is unmounted automatically after the last access and an idle period

           If this switch is not specified it defaults to false. If not specified and --discover
           is used (or only a single argument passed, which implies --discover, see above), and
           the file system block device is detected to be removable, it is set to true, in order
           to increase the chance that the file system is in a fully clean state if the device is
           unplugged abruptly.

           Equivalent to --automount=yes.

           Takes a time value that controls the idle timeout in automount mode. If set to
           "infinity" (the default) no automatic unmounts are done. Otherwise the file system
           backing the automount point is detached after the last access and the idle timeout
           passed. See systemd.time(7) for details on the time syntax supported. This option has
           no effect if only a regular mount is established, and automounting is not used.

           Note that if --discover is used (or only a single argument passed, which implies
           --discover, see above), and the file system block device is detected to be removable,
           --timeout-idle-sec=1s is implied.

           Similar to --property=, but applies additional properties to the automount unit
           created, instead of the mount unit.

           This option only has an effect in automount mode, and controls whether the automount
           unit shall be bound to the backing device's lifetime. If set, the automount point will
           be removed automatically when the backing device vanishes. By default the automount
           point stays around, and subsequent accesses will block until backing device is
           replugged. This option has no effect in case of non-device mounts, such as network or
           virtual file system mounts.

           Note that if --discover is used (or only a single argument passed, which implies
           --discover, see above), and the file system block device is detected to be removable,
           this option is implied.

           Instead of establishing a mount or automount point, print a terse list of block
           devices containing file systems that may be mounted with "systemd-mount", along with
           useful metadata such as labels, etc.

       -u, --umount
           Stop the mount and automount units corresponding to the specified mount points WHERE
           or the devices WHAT.  systemd-mount with this option or systemd-umount can take
           multiple arguments which can be mount points, devices, /etc/fstab style node names, or
           backing files corresponding to loop devices, like systemd-mount --umount
           /path/to/umount /dev/sda1 UUID=xxxxxx-xxxx LABEL=xxxxx /path/to/disk.img. Note that
           when -H or -M is specified, only absolute paths to mount points are supported.

       -G, --collect
           Unload the transient unit after it completed, even if it failed. Normally, without
           this option, all mount units that mount and failed are kept in memory until the user
           explicitly resets their failure state with systemctl reset-failed or an equivalent
           command. On the other hand, units that stopped successfully are unloaded immediately.
           If this option is turned on the "garbage collection" of units is more aggressive, and
           unloads units regardless if they exited successfully or failed. This option is a
           shortcut for --property=CollectMode=inactive-or-failed, see the explanation for
           CollectMode= in systemd.unit(5) for further information.

           Talk to the service manager of the calling user, rather than the service manager of
           the system.

           Talk to the service manager of the system. This is the implied default.

       -H, --host=
           Execute the operation remotely. Specify a hostname, or a username and hostname
           separated by "@", to connect to. The hostname may optionally be suffixed by a port ssh
           is listening on, separated by ":", and then a container name, separated by "/", which
           connects directly to a specific container on the specified host. This will use SSH to
           talk to the remote machine manager instance. Container names may be enumerated with
           machinectl -H HOST. Put IPv6 addresses in brackets.

       -M, --machine=
           Execute operation on a local container. Specify a container name to connect to,
           optionally prefixed by a user name to connect as and a separating "@" character. If
           the special string ".host" is used in place of the container name, a connection to the
           local system is made (which is useful to connect to a specific user's user bus:
           "--user"). If the "@" syntax is not used, the connection is
           made as root user. If the "@" syntax is used either the left hand side or the right
           hand side may be omitted (but not both) in which case the local user name and ".host"
           are implied.

       -h, --help
           Print a short help text and exit.

           Print a short version string and exit.


       On success, 0 is returned, a non-zero failure code otherwise.


       If --discover is used, systemd-mount honors a couple of additional udev properties of
       block devices:

           The mount options to use, if --options= is not used.

           The file system path to place the mount point at, instead of the automatically
           generated one.


       Use a udev rule like the following to automatically mount all USB storage plugged in:

           ACTION=="add", SUBSYSTEMS=="usb", SUBSYSTEM=="block", ENV{ID_FS_USAGE}=="filesystem", \
                   RUN{program}+="/usr/bin/systemd-mount --no-block --automount=yes --collect $devnode"


       systemd(1), mount(8), systemctl(1), systemd.unit(5), systemd.mount(5),
       systemd.automount(5), systemd-run(1)