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SYSTEMD.MOUNT(5)                          systemd.mount                          SYSTEMD.MOUNT(5)

       systemd.mount - Mount unit configuration


       A unit configuration file whose name ends in ".mount" encodes information about a file
       system mount point controlled and supervised by systemd.

       This man page lists the configuration options specific to this unit type. See
       systemd.unit(5) for the common options of all unit configuration files. The common
       configuration items are configured in the generic [Unit] and [Install] sections. The mount
       specific configuration options are configured in the [Mount] section.

       Additional options are listed in systemd.exec(5), which define the execution environment
       the mount(8) binary is executed in, and in systemd.kill(5), which define the way the
       processes are terminated, and in systemd.resource-control(5), which configure resource
       control settings for the processes of the service. Note that the User= and Group= options
       are not particularly useful for mount units specifying a "Type=" option or using
       configuration not specified in /etc/fstab; mount(8) will refuse options that are not
       listed in /etc/fstab if it is not run as UID 0.

       Mount units must be named after the mount point directories they control. Example: the
       mount point /home/lennart must be configured in a unit file home-lennart.mount. For
       details about the escaping logic used to convert a file system path to a unit name, see

       Optionally, a mount unit may be accompanied by an automount unit, to allow on-demand or
       parallelized mounting. See systemd.automount(5).

       If a mount point is beneath another mount point in the file system hierarchy, a dependency
       between both units is created automatically.

       Mount points created at runtime (independently of unit files or /etc/fstab) will be
       monitored by systemd and appear like any other mount unit in systemd. See
       /proc/self/mountinfo description in proc(5).

       Some file systems have special semantics as API file systems for kernel-to-userspace and
       userspace-to-userpace interfaces. Some of them may not be changed via mount units, and
       cannot be disabled. For a longer discussion see API File Systems[1].

       Mount units may either be configured via unit files, or via /etc/fstab (see fstab(5) for
       details). Mounts listed in /etc/fstab will be converted into native units dynamically at
       boot and when the configuration of the system manager is reloaded. In general, configuring
       mount points through /etc/fstab is the preferred approach. See systemd-fstab-generator(8)
       for details about the conversion.

       When reading /etc/fstab a few special mount options are understood by systemd which
       influence how dependencies are created for mount points from /etc/fstab. systemd will
       create a dependency of type Wants or Requires (see option nofail below), from either
       local-fs.target or remote-fs.target, depending whether the file system is local or remote.

           An automount unit will be created for the file system. See systemd.automount(5) for

           Configure how long systemd should wait for a device to show up before giving up on an
           entry from /etc/fstab. Specify a time in seconds or explicitly append a unit as "s",
           "min", "h", "ms".

           Note that this option can only be used in /etc/fstab, and will be ignored when part of
           Options= setting in a unit file.

       nofail, fail
           With nofail this mount will be only wanted, not required, by the local-fs.target. This
           means that the boot will continue even if this mount point is not mounted
           successfully. Option fail has the opposite meaning and is the default.

       noauto, auto
           With noauto, this mount will not be added as a dependency for local-fs.target. This
           means that it will not be mounted automatically during boot, unless it is pulled in by
           some other unit. Option auto has the opposite meaning and is the default.

           An additional filesystem to be mounted in the initramfs. See initrd-fs.target
           description in systemd.special(7).

       If a mount point is configured in both /etc/fstab and a unit file that is stored below
       /usr, the former will take precedence. If the unit file is stored below /etc, it will take
       precedence. This means: native unit files take precedence over traditional configuration
       files, but this is superseded by the rule that configuration in /etc will always take
       precedence over configuration in /usr.

       Mount files must include a [Mount] section, which carries information about the file
       system mount points it supervises. A number of options that may be used in this section
       are shared with other unit types. These options are documented in systemd.exec(5) and
       systemd.kill(5). The options specific to the [Mount] section of mount units are the

           Takes an absolute path of a device node, file or other resource to mount. See mount(8)
           for details. If this refers to a device node, a dependency on the respective device
           unit is automatically created. (See systemd.device(5) for more information.) This
           option is mandatory.

           Takes an absolute path of a directory of the mount point. If the mount point does not
           exist at the time of mounting, it is created. This string must be reflected in the
           unit filename. (See above.) This option is mandatory.

           Takes a string for the file system type. See mount(8) for details. This setting is

           Mount options to use when mounting. This takes a comma-separated list of options. This
           setting is optional.

           Takes a boolean argument. If true, parsing of the options specified in Options= is
           relaxed, and unknown mount options are tolerated. This corresponds with mount(8)'s -s
           switch. Defaults to off.

           Directories of mount points (and any parent directories) are automatically created if
           needed. This option specifies the file system access mode used when creating these
           directories. Takes an access mode in octal notation. Defaults to 0755.

           Configures the time to wait for the mount command to finish. If a command does not
           exit within the configured time, the mount will be considered failed and be shut down
           again. All commands still running will be terminated forcibly via SIGTERM, and after
           another delay of this time with SIGKILL. (See KillMode= in systemd.kill(5).) Takes a
           unit-less value in seconds, or a time span value such as "5min 20s". Pass 0 to disable
           the timeout logic. The default value is set from the manager configuration file's
           DefaultTimeoutStart= variable.

       Check systemd.exec(5) and systemd.kill(5) for more settings.

       systemd(1), systemctl(1), systemd.unit(5), systemd.exec(5), systemd.kill(5),
       systemd.resource-control(5), systemd.service(5), systemd.device(5), proc(5), mount(8),
       systemd-fstab-generator(8), systemd.directives(7)

        1. API File Systems

systemd 215                                                                      SYSTEMD.MOUNT(5)

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