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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>systemd-suspend.service</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 204</span><hr><div class="refentry"><a name="systemd-suspend.service"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>systemd-suspend.service, systemd-hibernate.service, systemd-hybrid-sleep.service, systemd-sleep — System sleep state logic</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><p><code class="filename">systemd-suspend.service</code></p><p><code class="filename">systemd-hibernate.service</code></p><p><code class="filename">systemd-hybrid-sleep.service</code></p><p><code class="filename">/usr/lib/systemd/systemd-sleep</code></p></div><div class="refsect1"><a name="idm259781854720"></a><h2 id="Description">Description<a class="headerlink" title="Permalink to this headline" href="#Description">¶</a></h2><p><code class="filename">systemd-suspend.service</code> is
a system service that is pulled in by
<code class="filename">suspend.target</code> and is responsible
for the actual system suspend. Similarly,
<code class="filename">systemd-hibernate.service</code> is
pulled in by <code class="filename">hibernate.target</code> to
execute the actual hibernation. Finally,
<code class="filename">systemd-hybrid-sleep.service</code> is
pulled in by <code class="filename">hybrid-sleep.target</code>
to execute hybrid hibernation with system
suspend.</p><p>Immediately before entering system suspend
and/or hibernation
<code class="filename">systemd-suspend.service</code> (and the
other mentioned units, respectively) will run all
executables in
<code class="filename">/usr/lib/systemd/system-sleep/</code>
and pass two arguments to them. The first argument
will be "<code class="literal">pre</code>", the second either
"<code class="literal">suspend</code>",
"<code class="literal">hibernate</code>", or
"<code class="literal">hybrid-sleep</code>" depending on the
chosen action. Immediately after leaving system
suspend and/or hibernation the same executables are run,
but the first argument is now
"<code class="literal">post</code>". All executables in this
directory are executed in parallel, and execution of
the action is not continued until all executables
have finished.</p><p>Note that scripts or binaries dropped in
<code class="filename">/usr/lib/systemd/system-sleep/</code>
are intended for local use only and should be
considered hacks. If applications want to be notified
of system suspend/hibernation and resume there are
much nicer interfaces available.</p><p>Note that
<code class="filename">systemd-suspend.service</code>,
<code class="filename">systemd-hibernate.service</code>, and
<code class="filename">systemd-hybrid-sleep.service</code>
should never be executed directly. Instead, trigger
system sleep states with a command such as
"<code class="literal">systemctl suspend</code>" or
similar.</p><p>Internally, this service will echo a string like
"<code class="literal">mem</code>" into
<code class="filename">/sys/power/state</code>, to trigger the
actual system suspend. What exactly is written
where can be configured in the <code class="literal">[Sleep]</code>
section of <code class="filename">/etc/systemd/sleep.conf</code>.
See <a href="systemd-sleep.conf.html"><span class="citerefentry"><span class="refentrytitle">systemd-sleep.conf</span>(5)</span></a>.
</p></div><div class="refsect1"><a name="idm259785791520"></a><h2 id="Options">Options<a class="headerlink" title="Permalink to this headline" href="#Options">¶</a></h2><p><span class="command"><strong>systemd-sleep</strong></span> understands the
following commands:</p><div class="variablelist"><dl class="variablelist"><dt id="-h"><span class="term"><code class="option">-h</code>, </span><span class="term"><code class="option">--help</code></span><a class="headerlink" title="Permalink to this term" href="#-h">¶</a></dt><dd><p>Print a short help
text and exit.</p></dd><dt id="--version"><span class="term"><code class="option">--version</code></span><a class="headerlink" title="Permalink to this term" href="#--version">¶</a></dt><dd><p>Print the systemd version
identifier and exit.</p></dd><dt id="suspend"><span class="term"><code class="option">suspend</code>, </span><span class="term"><code class="option">hibernate</code>, </span><span class="term"><code class="option">hybrid-sleep</code></span><a class="headerlink" title="Permalink to this term" href="#suspend">¶</a></dt><dd><p>Suspend, hibernate, or
put the system to hybrid sleep.</p></dd></dl></div></div><div class="refsect1"><a name="idm259785775920"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
<a href="systemd-sleep.conf.html"><span class="citerefentry"><span class="refentrytitle">systemd-sleep.conf</span>(5)</span></a>,
<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>(1)</span></a>,
<a href="systemd.special.html"><span class="citerefentry"><span class="refentrytitle">systemd.special</span>(7)</span></a>,
<a href="systemd-halt.service.html"><span class="citerefentry"><span class="refentrytitle">systemd-halt.service</span>(8)</span></a>
</p></div></div></body></html>
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