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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>systemd.mount</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><style>
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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 215</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="idm214182106304"></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
"<code class="literal">.mount</code>" encodes information about
a file system mount point controlled and supervised by
systemd.</p><p>This man page lists the configuration options
specific to this unit type. See
<a href="systemd.unit.html"><span class="citerefentry"><span class="refentrytitle">systemd.unit</span>(5)</span></a>
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.</p><p>Additional options are listed in
<a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a>,
which define the execution environment the
<a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a>
binary is executed in, and in
<a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a>,
which define the way the processes are terminated, and
in
<a href="systemd.resource-control.html"><span class="citerefentry"><span class="refentrytitle">systemd.resource-control</span>(5)</span></a>,
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 "<code class="literal">Type=</code>" option or
using configuration not specified in
<code class="filename">/etc/fstab</code>;
<a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a>
will refuse options that are not listed in
<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 they control. Example: the mount point
<code class="filename">/home/lennart</code> must be configured
in a unit file
<code class="filename">home-lennart.mount</code>. For details
about the escaping logic used to convert a file system
path to a unit name, see
<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 unit, to allow on-demand or parallelized
mounting. See
<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 system hierarchy, a dependency between both
units is created automatically.</p><p>Mount points created at runtime (independently of
unit files or <code class="filename">/etc/fstab</code>) will be
monitored by systemd and appear like any other mount
unit in systemd.
See <code class="filename">/proc/self/mountinfo</code> description
in <a href="proc.html"><span class="citerefentry"><span class="refentrytitle">proc</span>(5)</span></a>.
</p><p>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 <a class="ulink" href="http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems" target="_top">API
File Systems</a>.</p></div><div class="refsect1"><a name="idm214182689296"></a><h2 id="/etc/fstab"><code class="filename">/etc/fstab</code><a class="headerlink" title="Permalink to this headline" href="#/etc/fstab">¶</a></h2><p>Mount units may either be configured via unit
files, or via <code class="filename">/etc/fstab</code> (see
<a href="fstab.html"><span class="citerefentry"><span class="refentrytitle">fstab</span>(5)</span></a>
for details). Mounts listed in
<code class="filename">/etc/fstab</code> 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
<code class="filename">/etc/fstab</code> is the preferred
approach. See
<a href="systemd-fstab-generator.html"><span class="citerefentry"><span class="refentrytitle">systemd-fstab-generator</span>(8)</span></a>
for details about the conversion.</p><p>When reading <code class="filename">/etc/fstab</code> a
few special mount options are understood by systemd
which influence how dependencies are created for mount
points from <code class="filename">/etc/fstab</code>. systemd
will create a dependency of type
<code class="option">Wants</code> or <code class="option">Requires</code>
(see option <code class="option">nofail</code> below), from
either <code class="filename">local-fs.target</code> or
<code class="filename">remote-fs.target</code>, depending
whether the file 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 system. See
<a href="systemd.automount.html"><span class="citerefentry"><span class="refentrytitle">systemd.automount</span>(5)</span></a>
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 device to show up before giving up on
an entry from
<code class="filename">/etc/fstab</code>. Specify a time in
seconds or explicitly append a unit as
"<code class="literal">s</code>", "<code class="literal">min</code>",
"<code class="literal">h</code>",
"<code class="literal">ms</code>".</p><p>Note that this option can only be used in
<code class="filename">/etc/fstab</code>, and will be
ignored when part of <code class="varname">Options=</code>
setting in a unit file.</p></dd><dt id="nofail"><span class="term"><code class="option">nofail</code>, </span><span class="term"><code class="option">fail</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 be only wanted, not required, by the
<code class="filename">local-fs.target</code>. This means
that the boot will continue even if this mount
point is not mounted successfully. Option
<code class="option">fail</code> has the opposite meaning and
is the default.</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 not be added as a dependency for
<code class="filename">local-fs.target</code>. This means
that it will not be mounted automatically during
boot, unless it is pulled in by some other
unit. Option <code class="option">auto</code> has the
opposite meaning and is the default.</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 initramfs. See
<code class="filename">initrd-fs.target</code> description
in
<a href="systemd.special.html"><span class="citerefentry"><span class="refentrytitle">systemd.special</span>(7)</span></a>.
</p></dd></dl></div><p>If a mount point is configured in both
<code class="filename">/etc/fstab</code> and a unit file that
is stored below <code class="filename">/usr</code>, the former
will take precedence. If the unit file is stored below
<code class="filename">/etc</code>, 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
<code class="filename">/etc</code> will always take precedence
over configuration in
<code class="filename">/usr</code>.</p></div><div class="refsect1"><a name="idm214181078496"></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 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
<a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a>
and
<a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a>. The
options specific to the [Mount] section of mount
units are the 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 or other
resource to mount. See
<a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a>
for details. If this refers to a
device node, a dependency on the
respective device unit is
automatically created. (See
<a href="systemd.device.html"><span class="citerefentry"><span class="refentrytitle">systemd.device</span>(5)</span></a> for more information.)
This option is
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 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.</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
<a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a>
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 a
comma-separated list of options. This
setting is 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 the
options specified in
<code class="varname">Options=</code> is
relaxed, and unknown mount options are
tolerated. This corresponds with
<a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a>'s
<em class="parameter"><code>-s</code></em>
switch. Defaults to
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 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.</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 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
<code class="constant">SIGTERM</code>, and after another delay of
this time with <code class="constant">SIGKILL</code>. (See
<code class="option">KillMode=</code> in
<a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a>.)
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 <code class="varname">DefaultTimeoutStart=</code> variable.</p></dd></dl></div><p>Check
<a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a>
and
<a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a>
for more settings.</p></div><div class="refsect1"><a name="idm214180019264"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
<a href="systemd.html"><span class="citerefentry"><span class="refentrytitle">systemd</span>(1)</span></a>,
<a href="systemctl.html"><span class="citerefentry"><span class="refentrytitle">systemctl</span>(8)</span></a>,
<a href="systemd.unit.html"><span class="citerefentry"><span class="refentrytitle">systemd.unit</span>(5)</span></a>,
<a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a>,
<a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a>,
<a href="systemd.resource-control.html"><span class="citerefentry"><span class="refentrytitle">systemd.resource-control</span>(5)</span></a>,
<a href="systemd.service.html"><span class="citerefentry"><span class="refentrytitle">systemd.service</span>(5)</span></a>,
<a href="systemd.device.html"><span class="citerefentry"><span class="refentrytitle">systemd.device</span>(5)</span></a>,
<a href="proc.html"><span class="citerefentry"><span class="refentrytitle">proc</span>(5)</span></a>,
<a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a>,
<a href="systemd-fstab-generator.html"><span class="citerefentry"><span class="refentrytitle">systemd-fstab-generator</span>(8)</span></a>,
<a href="systemd.directives.html"><span class="citerefentry"><span class="refentrytitle">systemd.directives</span>(7)</span></a>
</p></div></div></body></html>
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