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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>tmpfiles.d</title><meta name="generator" content="DocBook XSL Stylesheets V1.76.1"/></head><body><div class="refentry" title="tmpfiles.d"><a id="tmpfiles.d"/><div class="titlepage"/><div class="refnamediv"><h2>Name</h2><p>tmpfiles.d — Configuration for creation, deletion and
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cleaning of volatile and temporary files</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><p><code class="filename">/usr/lib/tmpfiles.d/*.conf</code></p><p><code class="filename">/etc/tmpfiles.d/*.conf</code></p><p><code class="filename">/run/tmpfiles.d/*.conf</code></p></div><div class="refsect1" title="Description"><a id="id335079"/><h2>Description</h2><p><span class="command"><strong>systemd-tmpfiles</strong></span> uses the
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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>tmpfiles.d</title><meta name="generator" content="DocBook XSL Stylesheets V1.76.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" title="tmpfiles.d"><a name="tmpfiles.d"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>tmpfiles.d — Configuration for creation, deletion and
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cleaning of volatile and temporary files</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><p><code class="filename">/etc/tmpfiles.d/*.conf</code></p><p><code class="filename">/run/tmpfiles.d/*.conf</code></p><p><code class="filename">/usr/lib/tmpfiles.d/*.conf</code></p></div><div class="refsect1" title="Description"><a name="id398678"></a><h2>Description</h2><p><span class="command"><strong>systemd-tmpfiles</strong></span> uses the
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configuration files from the above directories to describe the
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creation, cleaning and removal of volatile and
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temporary files and directories which usually reside
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in directories such as <code class="filename">/run</code>
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or <code class="filename">/tmp</code>.</p></div><div class="refsect1" title="Configuration Format"><a id="id335107"/><h2>Configuration Format</h2><p>Each configuration file is named in the style of
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<code class="filename"><program>.conf</code>.
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Files in <code class="filename">/etc/</code> overwrite
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files with the same name in <code class="filename">/usr/lib/</code>.
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Files in <code class="filename">/run</code> overwrite files with
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the same name in <code class="filename">/etc/</code> and
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<code class="filename">/usr/lib/</code>. Packages should install their
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configuration files in <code class="filename">/usr/lib/</code>, files
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in <code class="filename">/etc/</code> are reserved for the local
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administration, which possibly decides to overwrite the
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configurations installed from packages. All files are sorted
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by filename in alphabetical order, regardless in which of the
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directories they reside, to ensure that a specific
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configuration file takes precedence over another file with
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an alphabetically later name.</p><p>The configuration format is one line per path
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containing action, mode, ownership and age
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fields:</p><pre class="programlisting">Type Path Mode UID GID Age
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d /run/user 0755 root root 10d</pre><div class="refsect2" title="Type"><a id="id335177"/><h3>Type</h3><div class="variablelist"><dl><dt><span class="term"><code class="varname">f</code></span></dt><dd><p>Create a file if it doesn't exist yet</p></dd><dt><span class="term"><code class="varname">F</code></span></dt><dd><p>Create or truncate a file</p></dd><dt><span class="term"><code class="varname">d</code></span></dt><dd><p>Create a directory if it doesn't exist yet</p></dd><dt><span class="term"><code class="varname">D</code></span></dt><dd><p>Create or empty a directory</p></dd><dt><span class="term"><code class="varname">p</code></span></dt><dd><p>Create a named pipe (FIFO) if it doesn't exist yet</p></dd><dt><span class="term"><code class="varname">x</code></span></dt><dd><p>Ignore a path
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or <code class="filename">/tmp</code>.</p></div><div class="refsect1" title="Configuration Format"><a name="id398706"></a><h2>Configuration Format</h2><p>Each configuration file is named in the style of
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<code class="filename"><program>.conf</code>. Files in
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<code class="filename">/etc/</code> override files with the
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same name in <code class="filename">/usr/lib/</code>. Files in
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<code class="filename">/run</code> override files with the same
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name in <code class="filename">/etc/</code> and
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<code class="filename">/usr/lib/</code>. Packages should
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install their configuration files in
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<code class="filename">/usr/lib/</code>, files in
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<code class="filename">/etc/</code> are reserved for the local
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administrator, who may choose to override the
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configurations installed from packages. The list of
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configuration files are sorted by their filename in
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alphabetical order, regardless in which of the
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directories they reside, to guarantee that a
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configuration file takes precedence over another
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configuration file with an alphabetically later
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name.</p><p>The configuration format is one line per path
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containing action, path, mode, ownership, age and argument
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fields:</p><pre class="programlisting">Type Path Mode UID GID Age Argument
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d /run/user 0755 root root 10d -
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L /tmp/foobar - - - - /dev/null</pre><div class="refsect2" title="Type"><a name="id398778"></a><h3>Type</h3><div class="variablelist"><dl><dt><span class="term"><code class="varname">f</code></span></dt><dd><p>Create a file if it doesn't exist yet (optionally writing a short string into it, if the argument parameter is passed)</p></dd><dt><span class="term"><code class="varname">F</code></span></dt><dd><p>Create or truncate a file (optionally writing a short string into it, if the argument parameter is passed)</p></dd><dt><span class="term"><code class="varname">w</code></span></dt><dd><p>Write the argument parameter to a file, if it exists.</p></dd><dt><span class="term"><code class="varname">d</code></span></dt><dd><p>Create a directory if it doesn't exist yet</p></dd><dt><span class="term"><code class="varname">D</code></span></dt><dd><p>Create or empty a directory</p></dd><dt><span class="term"><code class="varname">p</code></span></dt><dd><p>Create a named pipe (FIFO) if it doesn't exist yet</p></dd><dt><span class="term"><code class="varname">L</code></span></dt><dd><p>Create a symlink if it doesn't exist yet</p></dd><dt><span class="term"><code class="varname">c</code></span></dt><dd><p>Create a character device node if it doesn't exist yet</p></dd><dt><span class="term"><code class="varname">b</code></span></dt><dd><p>Create a block device node if it doesn't exist yet</p></dd><dt><span class="term"><code class="varname">x</code></span></dt><dd><p>Ignore a path
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during cleaning. Use this type
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to exclude paths from clean-up
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as controlled with the Age
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directory). Lines of this type
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accept shell-style globs in
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place of normal path
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names.</p></dd></dl></div></div><div class="refsect2" title="Mode"><a id="id302653"/><h3>Mode</h3><p>The file access mode to use when
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names.</p></dd><dt><span class="term"><code class="varname">z</code></span></dt><dd><p>Restore
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SELinux security context label
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and set ownership and access
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mode of a file or directory if
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it exists. Lines of this type
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accept shell-style globs in
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place of normal path names.
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</p></dd><dt><span class="term"><code class="varname">Z</code></span></dt><dd><p>Recursively
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restore SELinux security
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ownership and access mode of a
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subdirectories (if it is a
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directory). Lines of this type
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accept shell-style globs in
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names.</p></dd></dl></div></div><div class="refsect2" title="Mode"><a name="id398507"></a><h3>Mode</h3><p>The file access mode to use when
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creating this file or directory. If omitted or
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when set to - the default is used: 0755 for
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directories, 0644 for files. This parameter is
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ignored for x, r, R lines.</p></div><div class="refsect2" title="UID, GID"><a id="id302665"/><h3>UID, GID</h3><p>The user and group to use for this file
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directories, 0644 for all other file
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objects. For z, Z lines if omitted or when set
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to - the file access mode will not be
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modified. This parameter is ignored for x, r,
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R, L lines.</p></div><div class="refsect2" title="UID, GID"><a name="id398520"></a><h3>UID, GID</h3><p>The user and group to use for this file
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or directory. This may either be a numeric
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user/group ID or a user or group name. If
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omitted or when set to - the default 0 (root)
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is used. . These parameters are ignored for x,
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r, R lines.</p></div><div class="refsect2" title="Age"><a id="id302678"/><h3>Age</h3><p>The date field, when set, is used to
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is used. For z, Z lines when omitted or when set to -
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the file ownership will not be modified.
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These parameters are ignored for x, r, R, L lines.</p></div><div class="refsect2" title="Age"><a name="id397917"></a><h3>Age</h3><p>The date field, when set, is used to
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decide what files to delete when cleaning. If
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a file or directory is older than the current
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time minus the age field it is deleted. The
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field format is a series of integers each
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followed by one of the following
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postfixes for the respective time units:</p><div class="variablelist"><dl><dt><span class="term"><code class="varname">s</code>, </span><span class="term"><code class="varname">min</code>, </span><span class="term"><code class="varname">h</code>, </span><span class="term"><code class="varname">d</code>, </span><span class="term"><code class="varname">w</code>, </span><span class="term"><code class="varname">ms</code>, </span><span class="term"><code class="varname">m</code>, </span><span class="term"><code class="varname">us</code></span></dt><dd/></dl></div><p>If multiple integers and units are specified the time
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postfixes for the respective time units:</p><div class="variablelist"><dl><dt><span class="term"><code class="varname">s</code>, </span><span class="term"><code class="varname">min</code>, </span><span class="term"><code class="varname">h</code>, </span><span class="term"><code class="varname">d</code>, </span><span class="term"><code class="varname">w</code>, </span><span class="term"><code class="varname">ms</code>, </span><span class="term"><code class="varname">m</code>, </span><span class="term"><code class="varname">us</code></span></dt><dd></dd></dl></div><p>If multiple integers and units are specified the time
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values are summed up.</p><p>The age field only applies to lines starting with
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d, D and x. If omitted or set to - no automatic clean-up
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is done.</p></div></div><div class="refsect1" title="Example"><a id="id302818"/><h2>Example</h2><div class="example"><a id="id302823"/><p class="title"><strong>Example 1. /etc/tmpfiles.d/screen.conf example</strong></p><div class="example-contents"><p><span class="command"><strong>screen</strong></span> needs two directories created at boot with specific modes and ownership.</p><pre class="programlisting">d /var/run/screens 1777 root root 10d
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d /var/run/uscreens 0755 root root 10d12h</pre></div></div><br class="example-break"/></div><div class="refsect1" title="See Also"><a id="id302845"/><h2>See Also</h2><p>
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is done.</p></div><div class="refsect2" title="Argument"><a name="id397981"></a><h3>Argument</h3><p>For L lines determines the destination
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path of the symlink. For c, b determines the
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major/minor of the device node, with major and
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minor formatted as integers, separated by :,
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e.g. "1:3". For f, F, w may be used to specify
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a short string that is written to the file,
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suffixed by a newline. Ignored for all other
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lines.</p></div></div><div class="refsect1" title="Example"><a name="id398545"></a><h2>Example</h2><div class="example"><a name="id398550"></a><p class="title"><b>Example 1. /etc/tmpfiles.d/screen.conf example</b></p><div class="example-contents"><p><span class="command"><strong>screen</strong></span> needs two directories created at boot with specific modes and ownership.</p><pre class="programlisting">d /var/run/screens 1777 root root 10d
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d /var/run/uscreens 0755 root root 10d12h</pre></div></div><br class="example-break"></div><div class="refsect1" title="See Also"><a name="id398572"></a><h2>See Also</h2><p>
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<span class="citerefentry"><span class="refentrytitle">systemd</span>(1)</span>,
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<span class="citerefentry"><span class="refentrytitle">systemd-tmpfiles</span>(8)</span>
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</p></div></div></body></html>
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