systemd Developer Lennart Poettering lennart@poettering.net systemd.mount 5 systemd.mount Mount unit configuration systemd.mount 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.unit5 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.exec5, which define the execution environment the mount8 binary is executed in, and in systemd.kill5 which define the way the processes are terminated. The User= and Group= options are not useful for mount units specifying a Type= option; the mount binary must run as root if there is a specified type. 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 systemd.unit5. Optionally, a mount unit may be accompanied by an automount unit, to allow on-demand or parallelized mounting. See systemd.automount5. 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 independent on unit files or /etc/fstab will be monitored by systemd and appear like any other mount unit in systemd. Mount units may either be configured via unit files, or via /etc/fstab (see fstab5 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. See systemd-fstab-generator8 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 from either local-fs.target or remote-fs.target, depending whether the file system is local or remote. If x-systemd.automount is set, an automount unit will be created for the file system. See systemd.automount5 for details. If x-systemd.device-timeout= is specified it may be used to 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 specify a unit as s, min, h, ms. If a mount point is configured in both /etc/fstab and a unit file, the configuration in the latter takes precedence. 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.exec5 and systemd.kill5. The options specific to the [Mount] section of mount units are the following: What= Takes an absolute path of a device node, file or other resource to mount. See mount8 for details. If this refers to a device node, a dependency on the respective device unit is automatically created. (See systemd.device5 for more information.) This option is mandatory. Where= 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 file name. (See above.) This option is mandatory. Type= Takes a string for the filesystem type. See mount8 for details. This setting is optional. Options= Mount options to use when mounting. This takes a comma separated list of options. This setting is optional. DirectoryMode= 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. TimeoutSec= 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.kill5.) Takes a unit-less value in seconds, or a time span value such as "5min 20s". Pass 0 to disable the timeout logic. Defaults to 90s. Check systemd.exec5 and systemd.kill5 for more settings. The following option is also available in the [Mount] section, but exists purely for compatibility reasons and should not be used in newly written mount files. FsckPassNo= The pass number for the file system checking service for this mount. See systemd.service5 for more information on this setting. systemd1, systemctl8, systemd.unit5, systemd.exec5, systemd.kill5, systemd.service5, systemd.device5, mount8, systemd-fstab-generator8