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<h1><a href="../index.html">MIT Kerberos Documentation</a></h1>
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<div class="section" id="environment-variables">
<h1>Environment variables<a class="headerlink" href="#environment-variables" title="Permalink to this headline">ΒΆ</a></h1>
<p>The following environment variables can be used during runtime:</p>
<dl class="docutils">
<dt><strong>KRB5_CONFIG</strong></dt>
<dd>Main Kerberos configuration file. Multiple filenames can be
specified, separated by a colon; all files which are present will
be read. (See <a class="reference internal" href="../mitK5defaults.html#mitk5defaults"><em>MIT Kerberos defaults</em></a> for the default path.)</dd>
<dt><strong>KRB5_KDC_PROFILE</strong></dt>
<dd>KDC configuration file. (See <a class="reference internal" href="../mitK5defaults.html#mitk5defaults"><em>MIT Kerberos defaults</em></a> for the default
name.)</dd>
<dt><strong>KRB5_KTNAME</strong></dt>
<dd>Default keytab file name. (See <a class="reference internal" href="../mitK5defaults.html#mitk5defaults"><em>MIT Kerberos defaults</em></a> for the
default name.)</dd>
<dt><strong>KRB5_CLIENT_KTNAME</strong></dt>
<dd>Default client keytab file name. (See <a class="reference internal" href="../mitK5defaults.html#mitk5defaults"><em>MIT Kerberos defaults</em></a> for
the default name.)</dd>
<dt><strong>KRB5CCNAME</strong></dt>
<dd>Default name for the credentials cache file, in the form <em>type</em>:<em>residual</em>. The type of the default cache may determine the
availability of a cache collection. For instance, a default cache
of type <tt class="docutils literal"><span class="pre">DIR</span></tt> causes caches within the directory to be present
in the global cache collection.</dd>
<dt><strong>KRB5RCACHETYPE</strong></dt>
<dd>Default replay cache type. Defaults to <tt class="docutils literal"><span class="pre">dfl</span></tt>. A value of
<tt class="docutils literal"><span class="pre">none</span></tt> disables the replay cache.</dd>
<dt><strong>KRB5RCACHEDIR</strong></dt>
<dd>Default replay cache directory. (See <a class="reference internal" href="../mitK5defaults.html#mitk5defaults"><em>MIT Kerberos defaults</em></a> for the
default location.)</dd>
<dt><strong>KPROP_PORT</strong></dt>
<dd><a class="reference internal" href="admin_commands/kprop.html#kprop-8"><em>kprop</em></a> port to use. Defaults to 754.</dd>
<dt><strong>KRB5_TRACE</strong></dt>
<dd>Filename for trace-logging output (introduced in release 1.9).
For example, <tt class="docutils literal"><span class="pre">env</span> <span class="pre">KRB5_TRACE=/dev/stdout</span> <span class="pre">kinit</span></tt> would send
tracing information for kinit to <tt class="docutils literal"><span class="pre">/dev/stdout</span></tt>. Some programs
may ignore this variable (particularly setuid or login system
programs).</dd>
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<h2>On this page</h2>
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<li><a class="reference internal" href="#">Environment variables</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../user/index.html">For users</a></li>
<li class="toctree-l1 current"><a class="reference internal" href="index.html">For administrators</a><ul class="current">
<li class="toctree-l2"><a class="reference internal" href="install.html">Installation guide</a></li>
<li class="toctree-l2"><a class="reference internal" href="conf_files/index.html">Configuration Files</a></li>
<li class="toctree-l2"><a class="reference internal" href="realm_config.html">Realm configuration decisions</a></li>
<li class="toctree-l2"><a class="reference internal" href="database.html">Database administration</a></li>
<li class="toctree-l2"><a class="reference internal" href="lockout.html">Account lockout</a></li>
<li class="toctree-l2"><a class="reference internal" href="conf_ldap.html">Configuring Kerberos with OpenLDAP back-end</a></li>
<li class="toctree-l2"><a class="reference internal" href="appl_servers.html">Application servers</a></li>
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<li class="toctree-l2"><a class="reference internal" href="backup_host.html">Backups of secure hosts</a></li>
<li class="toctree-l2"><a class="reference internal" href="pkinit.html">PKINIT configuration</a></li>
<li class="toctree-l2"><a class="reference internal" href="otp.html">OTP Preauthentication</a></li>
<li class="toctree-l2"><a class="reference internal" href="princ_dns.html">Principal names and DNS</a></li>
<li class="toctree-l2"><a class="reference internal" href="enctypes.html">Encryption types</a></li>
<li class="toctree-l2"><a class="reference internal" href="https.html">HTTPS proxy configuration</a></li>
<li class="toctree-l2"><a class="reference internal" href="auth_indicator.html">Authentication indicators</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin_commands/index.html">Administration programs</a></li>
<li class="toctree-l2"><a class="reference internal" href="../mitK5defaults.html">MIT Kerberos defaults</a></li>
<li class="toctree-l2 current"><a class="current reference internal" href="">Environment variables</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../build/index.html">Building Kerberos V5</a></li>
<li class="toctree-l1"><a class="reference internal" href="../basic/index.html">Kerberos V5 concepts</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../mitK5features.html">MIT Kerberos features</a></li>
<li class="toctree-l1"><a class="reference internal" href="../build_this.html">How to build this documentation from the source</a></li>
<li class="toctree-l1"><a class="reference internal" href="../about.html">Contributing to the MIT Kerberos Documentation</a></li>
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