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</style><a href="index.html">Index </a>·
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<a href="../libudev/index.html">gudev </a><span style="float:right">systemd 219</span><hr><div class="refentry"><a name="systemd.mount"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>systemd.mount — Mount unit configuration</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><p><code class="filename"><em class="replaceable"><code>mount</code></em>.mount</code></p></div><div class="refsect1"><a name="idm139734078522512"></a><h2 id="Description">Description<a class="headerlink" title="Permalink to this headline" href="#Description">¶</a></h2><p>A unit configuration file whose name ends in
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"<code class="literal">.mount</code>" encodes information about a file system
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mount point controlled and supervised by systemd.</p><p>This man page lists the configuration options specific to
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this unit type. See
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<a href="systemd.unit.html"><span class="citerefentry"><span class="refentrytitle">systemd.unit</span>(5)</span></a>
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for the common options of all unit configuration files. The common
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configuration items are configured in the generic [Unit] and
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[Install] sections. The mount specific configuration options are
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configured in the [Mount] section.</p><p>Additional options are listed in
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<a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a>,
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which define the execution environment the
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<a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a>
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binary is executed in, and in
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<a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a>,
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which define the way the processes are terminated, and in
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<a href="systemd.resource-control.html"><span class="citerefentry"><span class="refentrytitle">systemd.resource-control</span>(5)</span></a>,
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which configure resource control settings for the processes of the
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service. Note that the User= and Group= options are not
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particularly useful for mount units specifying a
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"<code class="literal">Type=</code>" option or using configuration not
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specified in <code class="filename">/etc/fstab</code>;
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<a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a>
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will refuse options that are not listed in
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<code class="filename">/etc/fstab</code> if it is not run as UID 0.</p><p>Mount units must be named after the mount point directories
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they control. Example: the mount point
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<code class="filename">/home/lennart</code> must be
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configured in a unit file <code class="filename">home-lennart.mount</code>.
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For details about the escaping logic used to convert a file system
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path to a unit name, see
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<a href="systemd.unit.html"><span class="citerefentry"><span class="refentrytitle">systemd.unit</span>(5)</span></a>.</p><p>Optionally, a mount unit may be accompanied by an automount
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unit, to allow on-demand or parallelized mounting. See
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<a href="systemd.automount.html"><span class="citerefentry"><span class="refentrytitle">systemd.automount</span>(5)</span></a>.</p><p>If a mount point is beneath another mount point in the file
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system hierarchy, a dependency between both units is created
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automatically.</p><p>Mount points created at runtime (independently of unit files
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or <code class="filename">/etc/fstab</code>) will be monitored by systemd
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and appear like any other mount unit in systemd. See
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<code class="filename">/proc/self/mountinfo</code> description in
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<a href="http://man7.org/linux/man-pages/man5/proc.5.html"><span class="citerefentry"><span class="refentrytitle">proc</span>(5)</span></a>.
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</p><p>Some file systems have special semantics as API file systems
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for kernel-to-userspace and userspace-to-userpace interfaces. Some
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of them may not be changed via mount units, and cannot be
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disabled. For a longer discussion see <a class="ulink" href="http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems" target="_top">API
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File Systems</a>.</p></div><div class="refsect1"><a name="idm139734082402144"></a><h2 id="fstab"><code class="filename">fstab</code><a class="headerlink" title="Permalink to this headline" href="#fstab">¶</a></h2><p>Mount units may either be configured via unit files, or via
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<code class="filename">/etc/fstab</code> (see
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<a href="fstab.html"><span class="citerefentry"><span class="refentrytitle">fstab</span>(5)</span></a>
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for details). Mounts listed in <code class="filename">/etc/fstab</code>
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will be converted into native units dynamically at boot and when
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the configuration of the system manager is reloaded. In general,
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configuring mount points through <code class="filename">/etc/fstab</code>
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is the preferred approach. See
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<a href="systemd-fstab-generator.html"><span class="citerefentry"><span class="refentrytitle">systemd-fstab-generator</span>(8)</span></a>
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for details about the conversion.</p><p>When reading <code class="filename">/etc/fstab</code> a few special
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mount options are understood by systemd which influence how
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dependencies are created for mount points. systemd will create a
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dependency of type <code class="option">Wants</code> or
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<code class="option">Requires</code> (see option <code class="option">nofail</code>
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below), from either <code class="filename">local-fs.target</code> or
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<code class="filename">remote-fs.target</code>, depending whether the file
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system is local or remote.</p><div class="variablelist"><dl class="variablelist"><dt id="x-systemd.automount"><span class="term"><code class="option">x-systemd.automount</code></span><a class="headerlink" title="Permalink to this term" href="#x-systemd.automount">¶</a></dt><dd><p>An automount unit will be created for the file
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system. See
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<a href="systemd.automount.html"><span class="citerefentry"><span class="refentrytitle">systemd.automount</span>(5)</span></a>
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for details.</p></dd><dt id="x-systemd.device-timeout="><span class="term"><code class="option">x-systemd.device-timeout=</code></span><a class="headerlink" title="Permalink to this term" href="#x-systemd.device-timeout=">¶</a></dt><dd><p>Configure how long systemd should wait for a
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device to show up before giving up on an entry from
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<code class="filename">/etc/fstab</code>. Specify a time in seconds or
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explicitly append a unit as "<code class="literal">s</code>",
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"<code class="literal">min</code>", "<code class="literal">h</code>",
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"<code class="literal">ms</code>".</p><p>Note that this option can only be used in
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<code class="filename">/etc/fstab</code>, and will be
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ignored when part of <code class="varname">Options=</code>
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setting in a unit file.</p></dd><dt id="noauto"><span class="term"><code class="option">noauto</code>, </span><span class="term"><code class="option">auto</code></span><a class="headerlink" title="Permalink to this term" href="#noauto">¶</a></dt><dd><p>With <code class="option">noauto</code>, this mount will
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not be added as a dependency for
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<code class="filename">local-fs.target</code> or
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<code class="filename">remote-fs.target</code>. This means that it will
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not be mounted automatically during boot, unless it is pulled
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in by some other unit. Option <code class="option">auto</code> has the
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opposite meaning and is the default.</p></dd><dt id="nofail"><span class="term"><code class="option">nofail</code></span><a class="headerlink" title="Permalink to this term" href="#nofail">¶</a></dt><dd><p>With <code class="option">nofail</code> this mount will
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be only wanted, not required, by
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<code class="filename">local-fs.target</code> or
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<code class="filename">remote-fs.target</code>. This means that the
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boot will continue even if this mount point is not mounted
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successfully.</p></dd><dt id="x-initrd.mount"><span class="term"><code class="option">x-initrd.mount</code></span><a class="headerlink" title="Permalink to this term" href="#x-initrd.mount">¶</a></dt><dd><p>An additional filesystem to be mounted in the
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initramfs. See <code class="filename">initrd-fs.target</code>
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description in
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<a href="systemd.special.html"><span class="citerefentry"><span class="refentrytitle">systemd.special</span>(7)</span></a>.
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</p></dd></dl></div><p>If a mount point is configured in both
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<code class="filename">/etc/fstab</code> and a unit file that is stored
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below <code class="filename">/usr</code>, the former will take precedence.
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If the unit file is stored below <code class="filename">/etc</code>, it
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will take precedence. This means: native unit files take
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precedence over traditional configuration files, but this is
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superseded by the rule that configuration in
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<code class="filename">/etc</code> will always take precedence over
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configuration in <code class="filename">/usr</code>.</p></div><div class="refsect1"><a name="idm139734082359936"></a><h2 id="Options">Options<a class="headerlink" title="Permalink to this headline" href="#Options">¶</a></h2><p>Mount files must include a [Mount] section, which carries
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information about the file system mount points it supervises. A
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number of options that may be used in this section are shared with
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other unit types. These options are documented in
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<a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a>
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and
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<a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a>.
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The options specific to the [Mount] section of mount units are the
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following:</p><div class="variablelist"><dl class="variablelist"><dt id="What="><span class="term"><code class="varname">What=</code></span><a class="headerlink" title="Permalink to this term" href="#What=">¶</a></dt><dd><p>Takes an absolute path of a device node, file
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or other resource to mount. See
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<a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a>
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for details. If this refers to a device node, a dependency on
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the respective device unit is automatically created. (See
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<a href="systemd.device.html"><span class="citerefentry"><span class="refentrytitle">systemd.device</span>(5)</span></a>
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for more information.) This option is
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mandatory.</p></dd><dt id="Where="><span class="term"><code class="varname">Where=</code></span><a class="headerlink" title="Permalink to this term" href="#Where=">¶</a></dt><dd><p>Takes an absolute path of a directory of the
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mount point. If the mount point does not exist at the time of
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mounting, it is created. This string must be reflected in the
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unit filename. (See above.) This option is
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mandatory.</p></dd><dt id="Type="><span class="term"><code class="varname">Type=</code></span><a class="headerlink" title="Permalink to this term" href="#Type=">¶</a></dt><dd><p>Takes a string for the file system type. See
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<a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a>
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for details. This setting is optional.</p></dd><dt id="Options="><span class="term"><code class="varname">Options=</code></span><a class="headerlink" title="Permalink to this term" href="#Options=">¶</a></dt><dd><p>Mount options to use when mounting. This takes
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a comma-separated list of options. This setting is
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optional.</p></dd><dt id="SloppyOptions="><span class="term"><code class="varname">SloppyOptions=</code></span><a class="headerlink" title="Permalink to this term" href="#SloppyOptions=">¶</a></dt><dd><p>Takes a boolean argument. If true, parsing of
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the options specified in <code class="varname">Options=</code> is
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relaxed, and unknown mount options are tolerated. This
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corresponds with
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<a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a>'s
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<em class="parameter"><code>-s</code></em> switch. Defaults to
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off.</p></dd><dt id="DirectoryMode="><span class="term"><code class="varname">DirectoryMode=</code></span><a class="headerlink" title="Permalink to this term" href="#DirectoryMode=">¶</a></dt><dd><p>Directories of mount points (and any parent
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directories) are automatically created if needed. This option
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specifies the file system access mode used when creating these
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directories. Takes an access mode in octal notation. Defaults
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to 0755.</p></dd><dt id="TimeoutSec="><span class="term"><code class="varname">TimeoutSec=</code></span><a class="headerlink" title="Permalink to this term" href="#TimeoutSec=">¶</a></dt><dd><p>Configures the time to wait for the mount
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command to finish. If a command does not exit within the
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configured time, the mount will be considered failed and be
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shut down again. All commands still running will be terminated
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forcibly via <code class="constant">SIGTERM</code>, and after another
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delay of this time with <code class="constant">SIGKILL</code>. (See
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<code class="option">KillMode=</code> in
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<a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a>.)
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Takes a unit-less value in seconds, or a time span value such
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as "5min 20s". Pass 0 to disable the timeout logic. The
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default value is set from the manager configuration file's
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<code class="varname">DefaultTimeoutStart=</code>
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variable.</p></dd></dl></div><p>Check
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<a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a>
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and
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<a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a>
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for more settings.</p></div><div class="refsect1"><a name="idm139734077426000"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
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<a href="systemd.html"><span class="citerefentry"><span class="refentrytitle">systemd</span>(1)</span></a>,
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<a href="systemctl.html"><span class="citerefentry"><span class="refentrytitle">systemctl</span>(1)</span></a>,
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<a href="systemd.unit.html"><span class="citerefentry"><span class="refentrytitle">systemd.unit</span>(5)</span></a>,
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<a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a>,
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<a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a>,
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<a href="systemd.resource-control.html"><span class="citerefentry"><span class="refentrytitle">systemd.resource-control</span>(5)</span></a>,
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<a href="systemd.service.html"><span class="citerefentry"><span class="refentrytitle">systemd.service</span>(5)</span></a>,
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<a href="systemd.device.html"><span class="citerefentry"><span class="refentrytitle">systemd.device</span>(5)</span></a>,
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<a href="http://man7.org/linux/man-pages/man5/proc.5.html"><span class="citerefentry"><span class="refentrytitle">proc</span>(5)</span></a>,
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<a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a>,
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<a href="systemd-fstab-generator.html"><span class="citerefentry"><span class="refentrytitle">systemd-fstab-generator</span>(8)</span></a>,
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<a href="systemd.directives.html"><span class="citerefentry"><span class="refentrytitle">systemd.directives</span>(7)</span></a>
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</p></div></div></body></html>
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