SYSTEMD-MOUNT(1) systemd-mount SYSTEMD-MOUNT(1)
NAME
systemd-mount, systemd-umount - Establish and destroy transient mount or auto-mount points
SYNOPSIS
systemd-mount [OPTIONS...] WHAT [WHERE]
systemd-mount [OPTIONS...] --list
systemd-mount [OPTIONS...] --umount WHAT|WHERE...
DESCRIPTION
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"). If it is a block device, which is then probed for a label and other
metadata, and is mounted to a directory whose name is generated from the label. In this mode the block device 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 instead of a regular mount point is created (i.e. the --automount= option is implied, see below).
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 yet. 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.
OPTIONS
The following options are understood:
--no-block
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.
--no-pager
Do not pipe output into a pager.
--no-ask-password
Do not query the user for authentication for privileged operations.
--quiet, -q
Suppresses additional informational output while running.
--discover
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 time-out, 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", "ext4", ...). If omitted (or set to "auto") the file system is determined
automatically.
--options=, -o
Additional mount options for the mount point.
--owner=USER
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.
--fsck=
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.
--description=
Provide a description for the mount or automount unit. See Description= in systemd.unit(5).
--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.
--automount=
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 passed.
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.
-A
Equivalent to --automount=yes.
--timeout-idle-sec=
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.
--automount-property=
Similar to --property=, but applies additional properties to the automount unit created, instead of the mount unit.
--bind-device=
Takes a boolean argument, defaults to off. 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 enabled, the automount point will be removed automatically when the backing device
vanishes. If disabled 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.
--list
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 agressive, 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.
--user
Talk to the service manager of the calling user, rather than the service manager of the system.
--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 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.
-M, --machine=
Execute operation on a local container. Specify a container name to connect to.
-h, --help
Print a short help text and exit.
--version
Print a short version string and exit.
EXIT STATUS
On success, 0 is returned, a non-zero failure code otherwise.
THE UDEV DATABASE
If --discover is used, systemd-mount honors a couple of additional udev properties of block devices:
SYSTEMD_MOUNT_OPTIONS=
The mount options to use, if --options= is not used.
SYSTEMD_MOUNT_WHERE=
The file system path to place the mount point at, instead of the automatically generated one.
SEE ALSO
systemd(1), mount(8), systemctl(1), systemd.unit(5), systemd.mount(5), systemd.automount(5), systemd-run(1)
systemd 237 SYSTEMD-MOUNT(1)