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22 | <a href="../libudev/index.html">gudev </a><span style="float:right">systemd 208</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="idm274692535648"></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 |
23 | "<code class="literal">.mount</code>" encodes information about | |
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24 | a file system mount point controlled and supervised by |
25 | systemd.</p><p>This man page lists the configuration options | |
26 | specific to this unit type. See | |
27 | <a href="systemd.unit.html"><span class="citerefentry"><span class="refentrytitle">systemd.unit</span>(5)</span></a> | |
28 | for the common options of all unit configuration | |
29 | files. The common configuration items are configured | |
30 | in the generic [Unit] and [Install] sections. The | |
31 | mount specific configuration options are configured | |
32 | in the [Mount] section.</p><p>Additional options are listed in | |
33 | <a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a>, | |
34 | which define the execution environment the | |
35 | <a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a> | |
36 | binary is executed in, and in | |
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37 | <a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a>, |
38 | which define the way the processes are terminated, and | |
39 | in | |
40 | <a href="systemd.resource-control.html"><span class="citerefentry"><span class="refentrytitle">systemd.resource-control</span>(5)</span></a>, | |
41 | which configure resource control settings for the | |
42 | processes of the service. Note that the User= and | |
43 | Group= options are not particularly useful for mount | |
44 | units specifying a "<code class="literal">Type=</code>" option or | |
45 | using configuration not specified in | |
46 | <code class="filename">/etc/fstab</code>; | |
663996b3 | 47 | <a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a> |
14228c0d | 48 | will refuse options that are not listed in |
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49 | <code class="filename">/etc/fstab</code> if it is not run as |
50 | UID 0.</p><p>Mount units must be named after the mount point | |
51 | directories they control. Example: the mount point | |
52 | <code class="filename">/home/lennart</code> must be configured | |
53 | in a unit file | |
54 | <code class="filename">home-lennart.mount</code>. For details | |
55 | about the escaping logic used to convert a file system | |
56 | path to a unit name see | |
57 | <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 | |
58 | an automount unit, to allow on-demand or parallelized | |
59 | mounting. See | |
60 | <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 | |
61 | in the file system hierarchy, a dependency between both | |
62 | units is created automatically.</p><p>Mount points created at runtime (independently of | |
63 | unit files or <code class="filename">/etc/fstab</code>) will be | |
64 | monitored by systemd and appear like any other mount | |
65 | unit in systemd. | |
66 | See <code class="filename">/proc/self/mountinfo</code> description | |
67 | in <a href="proc.html"><span class="citerefentry"><span class="refentrytitle">proc</span>(5)</span></a>. | |
68 | </p><p>Some file systems have special semantics as API | |
69 | file systems for kernel-to-userspace and | |
70 | userspace-to-userpace interfaces. Some of them may not | |
71 | be changed via mount units, and cannot be disabled. | |
72 | For a longer discussion see <a class="ulink" href="http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems" target="_top">API | |
14228c0d | 73 | File Systems</a>.</p></div><div class="refsect1"><a name="idm274692592320"></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 |
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74 | files, or via <code class="filename">/etc/fstab</code> (see |
75 | <a href="fstab.html"><span class="citerefentry"><span class="refentrytitle">fstab</span>(5)</span></a> | |
76 | for details). Mounts listed in | |
77 | <code class="filename">/etc/fstab</code> will be converted into | |
78 | native units dynamically at boot and when the | |
79 | configuration of the system manager is reloaded. See | |
80 | <a href="systemd-fstab-generator.html"><span class="citerefentry"><span class="refentrytitle">systemd-fstab-generator</span>(8)</span></a> | |
81 | for details about the conversion.</p><p>When reading <code class="filename">/etc/fstab</code> a | |
82 | few special mount options are understood by systemd | |
83 | which influence how dependencies are created for mount | |
84 | points from <code class="filename">/etc/fstab</code>. systemd | |
85 | will create a dependency of type | |
86 | <code class="option">Wants</code> from either | |
87 | <code class="filename">local-fs.target</code> or | |
88 | <code class="filename">remote-fs.target</code>, depending | |
89 | whether the file system is local or remote. If | |
90 | <code class="option">x-systemd.automount</code> is set, an | |
91 | automount unit will be created for the file | |
92 | system. See | |
93 | <a href="systemd.automount.html"><span class="citerefentry"><span class="refentrytitle">systemd.automount</span>(5)</span></a> | |
94 | for details. If | |
95 | <code class="option">x-systemd.device-timeout=</code> is | |
14228c0d | 96 | specified, it may be used to configure how long systemd |
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97 | should wait for a device to show up before giving up |
98 | on an entry from | |
99 | <code class="filename">/etc/fstab</code>. Specify a time in | |
100 | seconds or explicitly specify a unit as | |
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101 | "<code class="literal">s</code>", "<code class="literal">min</code>", |
102 | "<code class="literal">h</code>", "<code class="literal">ms</code>".</p><p>If a mount point is configured in both | |
663996b3 | 103 | <code class="filename">/etc/fstab</code> and a unit file that |
14228c0d | 104 | is stored below <code class="filename">/usr</code>, the former |
663996b3 | 105 | will take precedence. If the unit file is stored below |
14228c0d | 106 | <code class="filename">/etc</code>, it will take |
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107 | precedence. This means: native unit files take |
108 | precedence over traditional configuration files, but | |
109 | this is superseded by the rule that configuration in | |
110 | <code class="filename">/etc</code> will always take precedence | |
111 | over configuration in | |
14228c0d | 112 | <code class="filename">/usr</code>.</p></div><div class="refsect1"><a name="idm274692566288"></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, |
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113 | which carries information about the file system mount points it |
114 | supervises. A number of options that may be used in | |
115 | this section are shared with other unit types. These | |
116 | options are documented in | |
117 | <a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a> | |
118 | and | |
119 | <a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a>. The | |
120 | options specific to the [Mount] section of mount | |
121 | 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 | |
122 | of a device node, file or other | |
123 | resource to mount. See | |
124 | <a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a> | |
125 | for details. If this refers to a | |
126 | device node, a dependency on the | |
127 | respective device unit is | |
128 | automatically created. (See | |
129 | <a href="systemd.device.html"><span class="citerefentry"><span class="refentrytitle">systemd.device</span>(5)</span></a> for more information.) | |
130 | This option is | |
131 | 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 | |
132 | of a directory of the mount point. If | |
133 | the mount point does not exist at the | |
134 | time of mounting, it is created. This | |
135 | string must be reflected in the unit | |
14228c0d | 136 | filename. (See above.) This option is |
663996b3 | 137 | 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 |
14228c0d | 138 | file system type. See |
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139 | <a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a> |
140 | for details. This setting is | |
141 | 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 | |
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142 | when mounting. This takes a |
143 | comma-separated list of options. This | |
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144 | setting is optional.</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 |
145 | points (and any parent directories) | |
146 | are automatically created if | |
147 | needed. This option specifies the file | |
148 | system access mode used when creating | |
149 | these directories. Takes an access | |
150 | mode in octal notation. Defaults to | |
151 | 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 | |
152 | wait for the mount command to | |
153 | finish. If a command does not exit | |
14228c0d | 154 | within the configured time, the mount |
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155 | will be considered failed and be shut |
156 | down again. All commands still running | |
157 | will be terminated forcibly via | |
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158 | <code class="constant">SIGTERM</code>, and after another delay of |
159 | this time with <code class="constant">SIGKILL</code>. (See | |
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160 | <code class="option">KillMode=</code> in |
161 | <a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a>.) | |
162 | Takes a unit-less value in seconds, or | |
163 | a time span value such as "5min | |
164 | 20s". Pass 0 to disable the timeout | |
165 | logic. Defaults to | |
166 | 90s.</p></dd></dl></div><p>Check | |
167 | <a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a> | |
168 | and | |
169 | <a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a> | |
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170 | for more settings.</p></div><div class="refsect1"><a name="idm274687630032"></a><h2 id="Compatibility Options">Compatibility Options<a class="headerlink" title="Permalink to this headline" href="#Compatibility%20Options">¶</a></h2><p>The following option is also available in the |
171 | "<code class="literal">[Mount]</code>" section, but exists purely | |
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172 | for compatibility reasons and should not be used in |
173 | newly written mount files.</p><div class="variablelist"><dl class="variablelist"><dt id="FsckPassNo="><span class="term"><code class="varname">FsckPassNo=</code></span><a class="headerlink" title="Permalink to this term" href="#FsckPassNo=">¶</a></dt><dd><p>The pass number for | |
174 | the file system checking service for | |
175 | this mount. See | |
176 | <a href="systemd.service.html"><span class="citerefentry"><span class="refentrytitle">systemd.service</span>(5)</span></a> | |
177 | for more information on this setting. | |
14228c0d | 178 | </p></dd></dl></div></div><div class="refsect1"><a name="idm274687624992"></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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179 | <a href="systemd.html"><span class="citerefentry"><span class="refentrytitle">systemd</span>(1)</span></a>, |
180 | <a href="systemctl.html"><span class="citerefentry"><span class="refentrytitle">systemctl</span>(8)</span></a>, | |
181 | <a href="systemd.unit.html"><span class="citerefentry"><span class="refentrytitle">systemd.unit</span>(5)</span></a>, | |
182 | <a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a>, | |
183 | <a href="systemd.kill.html"><span class="citerefentry"><span class="refentrytitle">systemd.kill</span>(5)</span></a>, | |
14228c0d | 184 | <a href="systemd.resource-control.html"><span class="citerefentry"><span class="refentrytitle">systemd.resource-control</span>(5)</span></a>, |
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185 | <a href="systemd.service.html"><span class="citerefentry"><span class="refentrytitle">systemd.service</span>(5)</span></a>, |
186 | <a href="systemd.device.html"><span class="citerefentry"><span class="refentrytitle">systemd.device</span>(5)</span></a>, | |
187 | <a href="proc.html"><span class="citerefentry"><span class="refentrytitle">proc</span>(5)</span></a>, | |
188 | <a href="mount.html"><span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span></a>, | |
189 | <a href="systemd-fstab-generator.html"><span class="citerefentry"><span class="refentrytitle">systemd-fstab-generator</span>(8)</span></a>, | |
190 | <a href="systemd.directives.html"><span class="citerefentry"><span class="refentrytitle">systemd.directives</span>(7)</span></a> | |
191 | </p></div></div></body></html> |