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<title>suexec - Switch user before executing external programs - Apache HTTP Server Version 2.4</title>
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<p class="apache">Apache HTTP Server Version 2.4</p>
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<a href="https://www.apache.org/">Apache</a> > <a href="https://httpd.apache.org/">HTTP Server</a> > <a href="https://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.4</a> > <a href="./">Programs</a></div><div id="page-content"><div id="preamble"><h1>suexec - Switch user before executing external programs</h1>
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<p><code class="program"><a href="../programs/suexec.html">suexec</a></code> is used by the Apache HTTP Server to switch
to another user before executing CGI programs. In order to achieve this,
it must run as <code>root</code>. Since the HTTP daemon normally doesn't
run as <code>root</code>, the <code class="program"><a href="../programs/suexec.html">suexec</a></code> executable needs the
setuid bit set and must be owned by <code>root</code>. It should never be
writable for any other person than <code>root</code>.</p>
<p>For further information about the concepts and the security model
of suexec please refer to the suexec documentation (<a href="http://httpd.apache.org/docs/2.4/suexec.html">http://httpd.apache.org/docs/2.4/suexec.html</a>).</p>
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<h2 id="synopsis">Synopsis <a title="Permanent link" href="#synopsis" class="permalink">¶</a></h2>
<p><code><strong>suexec</strong> -<strong>V</strong></code></p>
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<dt><code>-V</code></dt>
<dd>If you are <code>root</code>, this option displays the compile options of
<code class="program"><a href="../programs/suexec.html">suexec</a></code>. For security reasons all configuration options are
changeable only at compile time.</dd>
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