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</style><a href="index.html">Index </a>·
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<a href="systemd.directives.html">Directives </a>·
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<a href="../python-systemd/index.html">Python </a>·
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<a href="../libudev/index.html">libudev </a>·
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<a href="../libudev/index.html">gudev </a><span style="float:right">systemd 219</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="idm140653676146240"></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
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binary by the kernel when a user space program receives a fatal
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signal and dumps core. For it to be used in this capacity, it must
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be specified by the
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<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>
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setting. Systemd installs
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<code class="filename">/usr/lib/sysctl.d/50-coredump.conf</code> which
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configures <code class="varname">kernel.core_pattern</code> to invoke
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<span class="command"><strong>systemd-coredump</strong></span>. This file may be masked or
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overriden to use a different setting following normal
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<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
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signal is governed by a few factors which are described in detail
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in <a href="http://man7.org/linux/man-pages/man5/core.5.html"><span class="citerefentry"><span class="refentrytitle">core</span>(5)</span></a>.
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In particular, the coredump will only be processed when the
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related resource limits are high enough. For programs started by
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<span class="command"><strong>systemd</strong></span> those may be set using
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<code class="varname">LimitCore=</code> (see
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<a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a>).
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</p><p><span class="command"><strong>systemd-coredump</strong></span> will log the coredump
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including a backtrace if possible, and store the core (contents of
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process' memory contents) in an external file on disk in
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<code class="filename">/var/lib/systemd/coredump</code>, or directly in
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the journal. This behaviour may be modified using
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<a href="coredump.conf.html"><span class="citerefentry"><span class="refentrytitle">coredump.conf</span>(5)</span></a>.</p><p>Apart from the
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<a href="journalctl.html"><span class="citerefentry"><span class="refentrytitle">journalctl</span>(1)</span></a>
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log viewer,
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<a href="coredumpctl.html"><span class="citerefentry"><span class="refentrytitle">coredumpctl</span>(1)</span></a>
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may be used to list and extract coredumps.</p></div><div class="refsect1"><a name="idm140653676206240"></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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<a href="coredump.conf.html"><span class="citerefentry"><span class="refentrytitle">coredump.conf</span>(5)</span></a>,
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<a href="coredumpctl.html"><span class="citerefentry"><span class="refentrytitle">coredumpctl</span>(1)</span></a>,
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<a href="systemd-journald.service.html"><span class="citerefentry"><span class="refentrytitle">systemd-journald.service</span>(8)</span></a>,
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<a href="http://man7.org/linux/man-pages/man5/core.5.html"><span class="citerefentry"><span class="refentrytitle">core</span>(5)</span></a>,
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<a href="sysctl.d.html"><span class="citerefentry"><span class="refentrytitle">sysctl.d</span>(5)</span></a>,
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<a href="systemd-sysctl.service.html"><span class="citerefentry"><span class="refentrytitle">systemd-sysctl.service</span>(8)</span></a>.
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</p></div></div></body></html>
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