systemd.automount — Automount unit configuration
automount.automount
A unit configuration file whose name ends in
                .automount encodes information
                about a file system automount 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 automount specific configuration options are configured in the [Automount] section.
Automount units must be named after the
                automount directories they control. Example: the
                automount point /home/lennart
                must be configured in a unit file
                home-lennart.automount. For
                details about the escaping logic used to convert a
                file system path to a unit name see
                systemd.unit(5).
For each automount unit file a matching mount
                unit file (see
                systemd.mount(5)
                for details) must exist which is activated when the
                automount path is accessed. Example: if an automount
                unit home-lennart.automount is
                active and the user accesses
                /home/lennart the mount unit
                home-lennart.mount will be
                activated.
Automount units may be used to implement on-demand mounting as well as parallelized mounting of file systems.
If an automount point is beneath another mount point in the file system hierarchy a dependency between both units is created automatically.
fstab¶Automount units may either be configured via unit
                files, or via /etc/fstab (see
                fstab(5)
                for details).
For details how systemd parses
                /etc/fstab see
                systemd.mount(5).
If an automount point is configured in both
                /etc/fstab and a unit file the
                configuration in the latter takes precedence.
Automount files must include an [Automount] section, which carries information about the file system automount points it supervises. The options specific to the [Automount] section of automount units are the following:
Where=¶Takes an absolute path of a directory of the automount point. If the automount point is not existing at time that the automount point is installed it is created. This string must be reflected in the unit file name. (See above.) This option is mandatory.
DirectoryMode=¶Directories of automount 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.