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<div><h1 class="title"><a id="id-1"></a>Debug</h1><a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/apm-server/edit/6.3/docs/troubleshooting.asciidoc">edit</a></div>
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<p>By default, APM Server sends all its output to syslog. When you run APM Server in
the foreground, you can use the <code class="literal">-e</code> command line flag to redirect the output to
standard error instead. For example:</p>
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<pre class="programlisting prettyprint lang-sh">apm-server -e</pre>
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<p>The default configuration file is apm-server.yml (the location of the file varies by
platform). You can use a different configuration file by specifying the <code class="literal">-c</code> flag. For example:</p>
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<pre class="programlisting prettyprint lang-sh">apm-server -e -c myapm-serverconfig.yml</pre>
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<p>You can increase the verbosity of debug messages by enabling one or more debug
selectors. For example, to view the published transactions, you can start APM Server
with the <code class="literal">publish</code> selector like this:</p>
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<pre class="programlisting prettyprint lang-sh">apm-server -e -d "publish"</pre>
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<p>If you want all the debugging output (fair warning, it&#8217;s quite a lot), you can
use <code class="literal">*</code>, like this:</p>
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<pre class="programlisting prettyprint lang-sh">apm-server -e -d "*"</pre>
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