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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>systemd-coredump</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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<span style="float:right">systemd 221</span><hr><div class="refentry"><a name="systemd-coredump"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>systemd-coredump — Log and store core dumps</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><p><code class="filename">/usr/lib/systemd/systemd-coredump</code></p></div><div class="refsect1"><a name="idm47861817362960"></a><h2 id="Description">Description<a class="headerlink" title="Permalink to this headline" href="#Description">¶</a></h2><p><span class="command"><strong>systemd-coredump</strong></span> can be used as a helper
binary by the kernel when a user space program receives a fatal
signal and dumps core. For it to be used in this capacity, it must
be specified by the
<code class="varname">kernel.core_pattern</code> <a href="http://man7.org/linux/man-pages/man8/sysctl.8.html"><span class="citerefentry"><span class="refentrytitle">sysctl</span>(8)</span></a>
setting. Systemd installs
<code class="filename">/usr/lib/sysctl.d/50-coredump.conf</code> which
configures <code class="varname">kernel.core_pattern</code> to invoke
<span class="command"><strong>systemd-coredump</strong></span>. This file may be masked or
overridden to use a different setting following normal
<a href="sysctl.d.html"><span class="citerefentry"><span class="refentrytitle">sysctl.d</span>(5)</span></a> rules.</p><p>The behaviour of a specific program upon reception of a
signal is governed by a few factors which are described in detail
in <a href="http://man7.org/linux/man-pages/man5/core.5.html"><span class="citerefentry"><span class="refentrytitle">core</span>(5)</span></a>.
In particular, the coredump will only be processed when the
related resource limits are high enough. For programs started by
<span class="command"><strong>systemd</strong></span> those may be set using
<code class="varname">LimitCore=</code> (see
<a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a>).
</p><p><span class="command"><strong>systemd-coredump</strong></span> will log the coredump
including a backtrace if possible, and store the core (contents of
process' memory contents) in an external file on disk in
<code class="filename">/var/lib/systemd/coredump</code>, or directly in
the journal. This behaviour may be modified using
<a href="coredump.conf.html"><span class="citerefentry"><span class="refentrytitle">coredump.conf</span>(5)</span></a>.</p><p>Apart from the
<a href="journalctl.html"><span class="citerefentry"><span class="refentrytitle">journalctl</span>(1)</span></a>
log viewer,
<a href="coredumpctl.html"><span class="citerefentry"><span class="refentrytitle">coredumpctl</span>(1)</span></a>
may be used to list and extract coredumps.</p></div><div class="refsect1"><a name="idm47861812392240"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
<a href="coredump.conf.html"><span class="citerefentry"><span class="refentrytitle">coredump.conf</span>(5)</span></a>,
<a href="coredumpctl.html"><span class="citerefentry"><span class="refentrytitle">coredumpctl</span>(1)</span></a>,
<a href="systemd-journald.service.html"><span class="citerefentry"><span class="refentrytitle">systemd-journald.service</span>(8)</span></a>,
<a href="http://man7.org/linux/man-pages/man5/core.5.html"><span class="citerefentry"><span class="refentrytitle">core</span>(5)</span></a>,
<a href="sysctl.d.html"><span class="citerefentry"><span class="refentrytitle">sysctl.d</span>(5)</span></a>,
<a href="systemd-sysctl.service.html"><span class="citerefentry"><span class="refentrytitle">systemd-sysctl.service</span>(8)</span></a>.
</p></div></div></body></html>
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