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- <h1><a href="../../index.html">MIT Kerberos Documentation</a></h1>
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-
- <section id="kinit">
-<span id="kinit-1"></span><h1>kinit<a class="headerlink" href="#kinit" title="Link to this heading">¶</a></h1>
-<section id="synopsis">
-<h2>SYNOPSIS<a class="headerlink" href="#synopsis" title="Link to this heading">¶</a></h2>
-<p><strong>kinit</strong>
-[<strong>-V</strong>]
-[<strong>-l</strong> <em>lifetime</em>]
-[<strong>-s</strong> <em>start_time</em>]
-[<strong>-r</strong> <em>renewable_life</em>]
-[<strong>-p</strong> | -<strong>P</strong>]
-[<strong>-f</strong> | -<strong>F</strong>]
-[<strong>-a</strong>]
-[<strong>-A</strong>]
-[<strong>-C</strong>]
-[<strong>-E</strong>]
-[<strong>-v</strong>]
-[<strong>-R</strong>]
-[<strong>-k</strong> [<strong>-i</strong> | -<strong>t</strong> <em>keytab_file</em>]]
-[<strong>-c</strong> <em>cache_name</em>]
-[<strong>-n</strong>]
-[<strong>-S</strong> <em>service_name</em>]
-[<strong>-I</strong> <em>input_ccache</em>]
-[<strong>-T</strong> <em>armor_ccache</em>]
-[<strong>-X</strong> <em>attribute</em>[=<em>value</em>]]
-[<strong>–request-pac</strong> | <strong>–no-request-pac</strong>]
-[<em>principal</em>]</p>
-</section>
-<section id="description">
-<h2>DESCRIPTION<a class="headerlink" href="#description" title="Link to this heading">¶</a></h2>
-<p>kinit obtains and caches an initial ticket-granting ticket for
-<em>principal</em>. If <em>principal</em> is absent, kinit chooses an appropriate
-principal name based on existing credential cache contents or the
-local username of the user invoking kinit. Some options modify the
-choice of principal name.</p>
-</section>
-<section id="options">
-<h2>OPTIONS<a class="headerlink" href="#options" title="Link to this heading">¶</a></h2>
-<dl>
-<dt><strong>-V</strong></dt><dd><p>display verbose output.</p>
-</dd>
-<dt><strong>-l</strong> <em>lifetime</em></dt><dd><p>(<a class="reference internal" href="../../basic/date_format.html#duration"><span class="std std-ref">Time duration</span></a> string.) Requests a ticket with the lifetime
-<em>lifetime</em>.</p>
-<p>For example, <code class="docutils literal notranslate"><span class="pre">kinit</span> <span class="pre">-l</span> <span class="pre">5:30</span></code> or <code class="docutils literal notranslate"><span class="pre">kinit</span> <span class="pre">-l</span> <span class="pre">5h30m</span></code>.</p>
-<p>If the <strong>-l</strong> option is not specified, the default ticket lifetime
-(configured by each site) is used. Specifying a ticket lifetime
-longer than the maximum ticket lifetime (configured by each site)
-will not override the configured maximum ticket lifetime.</p>
-</dd>
-<dt><strong>-s</strong> <em>start_time</em></dt><dd><p>(<a class="reference internal" href="../../basic/date_format.html#duration"><span class="std std-ref">Time duration</span></a> string.) Requests a postdated ticket. Postdated
-tickets are issued with the <strong>invalid</strong> flag set, and need to be
-resubmitted to the KDC for validation before use.</p>
-<p><em>start_time</em> specifies the duration of the delay before the ticket
-can become valid.</p>
-</dd>
-<dt><strong>-r</strong> <em>renewable_life</em></dt><dd><p>(<a class="reference internal" href="../../basic/date_format.html#duration"><span class="std std-ref">Time duration</span></a> string.) Requests renewable tickets, with a total
-lifetime of <em>renewable_life</em>.</p>
-</dd>
-<dt><strong>-f</strong></dt><dd><p>requests forwardable tickets.</p>
-</dd>
-<dt><strong>-F</strong></dt><dd><p>requests non-forwardable tickets.</p>
-</dd>
-<dt><strong>-p</strong></dt><dd><p>requests proxiable tickets.</p>
-</dd>
-<dt><strong>-P</strong></dt><dd><p>requests non-proxiable tickets.</p>
-</dd>
-<dt><strong>-a</strong></dt><dd><p>requests tickets restricted to the host’s local address[es].</p>
-</dd>
-<dt><strong>-A</strong></dt><dd><p>requests tickets not restricted by address.</p>
-</dd>
-<dt><strong>-C</strong></dt><dd><p>requests canonicalization of the principal name, and allows the
-KDC to reply with a different client principal from the one
-requested.</p>
-</dd>
-<dt><strong>-E</strong></dt><dd><p>treats the principal name as an enterprise name.</p>
-</dd>
-<dt><strong>-v</strong></dt><dd><p>requests that the ticket-granting ticket in the cache (with the
-<strong>invalid</strong> flag set) be passed to the KDC for validation. If the
-ticket is within its requested time range, the cache is replaced
-with the validated ticket.</p>
-</dd>
-<dt><strong>-R</strong></dt><dd><p>requests renewal of the ticket-granting ticket. Note that an
-expired ticket cannot be renewed, even if the ticket is still
-within its renewable life.</p>
-<p>Note that renewable tickets that have expired as reported by
-<a class="reference internal" href="klist.html#klist-1"><span class="std std-ref">klist</span></a> may sometimes be renewed using this option,
-because the KDC applies a grace period to account for client-KDC
-clock skew. See <a class="reference internal" href="../../admin/conf_files/krb5_conf.html#krb5-conf-5"><span class="std std-ref">krb5.conf</span></a> <strong>clockskew</strong> setting.</p>
-</dd>
-<dt><strong>-k</strong> [<strong>-i</strong> | <strong>-t</strong> <em>keytab_file</em>]</dt><dd><p>requests a ticket, obtained from a key in the local host’s keytab.
-The location of the keytab may be specified with the <strong>-t</strong>
-<em>keytab_file</em> option, or with the <strong>-i</strong> option to specify the use
-of the default client keytab; otherwise the default keytab will be
-used. By default, a host ticket for the local host is requested,
-but any principal may be specified. On a KDC, the special keytab
-location <code class="docutils literal notranslate"><span class="pre">KDB:</span></code> can be used to indicate that kinit should open
-the KDC database and look up the key directly. This permits an
-administrator to obtain tickets as any principal that supports
-authentication based on the key.</p>
-</dd>
-<dt><strong>-n</strong></dt><dd><p>Requests anonymous processing. Two types of anonymous principals
-are supported.</p>
-<p>For fully anonymous Kerberos, configure pkinit on the KDC and
-configure <strong>pkinit_anchors</strong> in the client’s <a class="reference internal" href="../../admin/conf_files/krb5_conf.html#krb5-conf-5"><span class="std std-ref">krb5.conf</span></a>.
-Then use the <strong>-n</strong> option with a principal of the form <code class="docutils literal notranslate"><span class="pre">&#64;REALM</span></code>
-(an empty principal name followed by the at-sign and a realm
-name). If permitted by the KDC, an anonymous ticket will be
-returned.</p>
-<p>A second form of anonymous tickets is supported; these
-realm-exposed tickets hide the identity of the client but not the
-client’s realm. For this mode, use <code class="docutils literal notranslate"><span class="pre">kinit</span> <span class="pre">-n</span></code> with a normal
-principal name. If supported by the KDC, the principal (but not
-realm) will be replaced by the anonymous principal.</p>
-<p>As of release 1.8, the MIT Kerberos KDC only supports fully
-anonymous operation.</p>
-</dd>
-</dl>
-<p><strong>-I</strong> <em>input_ccache</em></p>
-<blockquote>
-<div><p>Specifies the name of a credentials cache that already contains a
-ticket. When obtaining that ticket, if information about how that
-ticket was obtained was also stored to the cache, that information
-will be used to affect how new credentials are obtained, including
-preselecting the same methods of authenticating to the KDC.</p>
-</div></blockquote>
-<dl>
-<dt><strong>-T</strong> <em>armor_ccache</em></dt><dd><p>Specifies the name of a credentials cache that already contains a
-ticket. If supported by the KDC, this cache will be used to armor
-the request, preventing offline dictionary attacks and allowing
-the use of additional preauthentication mechanisms. Armoring also
-makes sure that the response from the KDC is not modified in
-transit.</p>
-</dd>
-<dt><strong>-c</strong> <em>cache_name</em></dt><dd><p>use <em>cache_name</em> as the Kerberos 5 credentials (ticket) cache
-location. If this option is not used, the default cache location
-is used.</p>
-<p>The default cache location may vary between systems. If the
-<strong>KRB5CCNAME</strong> environment variable is set, its value is used to
-locate the default cache. If a principal name is specified and
-the type of the default cache supports a collection (such as the
-DIR type), an existing cache containing credentials for the
-principal is selected or a new one is created and becomes the new
-primary cache. Otherwise, any existing contents of the default
-cache are destroyed by kinit.</p>
-</dd>
-<dt><strong>-S</strong> <em>service_name</em></dt><dd><p>specify an alternate service name to use when getting initial
-tickets.</p>
-</dd>
-<dt><strong>-X</strong> <em>attribute</em>[=<em>value</em>]</dt><dd><p>specify a pre-authentication <em>attribute</em> and <em>value</em> to be
-interpreted by pre-authentication modules. The acceptable
-attribute and value values vary from module to module. This
-option may be specified multiple times to specify multiple
-attributes. If no value is specified, it is assumed to be “yes”.</p>
-<p>The following attributes are recognized by the PKINIT
-pre-authentication mechanism:</p>
-<dl class="simple">
-<dt><strong>X509_user_identity</strong>=<em>value</em></dt><dd><p>specify where to find user’s X509 identity information</p>
-</dd>
-<dt><strong>X509_anchors</strong>=<em>value</em></dt><dd><p>specify where to find trusted X509 anchor information</p>
-</dd>
-<dt><strong>disable_freshness</strong>[<strong>=yes</strong>]</dt><dd><p>disable sending freshness tokens (for testing purposes only)</p>
-</dd>
-</dl>
-</dd>
-<dt><strong>–request-pac</strong> | <strong>–no-request-pac</strong></dt><dd><p>mutually exclusive. If <strong>–request-pac</strong> is set, ask the KDC to
-include a PAC in authdata; if <strong>–no-request-pac</strong> is set, ask the
-KDC not to include a PAC; if neither are set, the KDC will follow
-its default, which is typically is to include a PAC if doing so is
-supported.</p>
-</dd>
-</dl>
-</section>
-<section id="environment">
-<h2>ENVIRONMENT<a class="headerlink" href="#environment" title="Link to this heading">¶</a></h2>
-<p>See <a class="reference internal" href="../user_config/kerberos.html#kerberos-7"><span class="std std-ref">kerberos</span></a> for a description of Kerberos environment
-variables.</p>
-</section>
-<section id="files">
-<h2>FILES<a class="headerlink" href="#files" title="Link to this heading">¶</a></h2>
-<dl class="simple">
-<dt><a class="reference internal" href="../../mitK5defaults.html#paths"><span class="std std-ref">DEFCCNAME</span></a></dt><dd><p>default location of Kerberos 5 credentials cache</p>
-</dd>
-<dt><a class="reference internal" href="../../mitK5defaults.html#paths"><span class="std std-ref">DEFKTNAME</span></a></dt><dd><p>default location for the local host’s keytab.</p>
-</dd>
-</dl>
-</section>
-<section id="see-also">
-<h2>SEE ALSO<a class="headerlink" href="#see-also" title="Link to this heading">¶</a></h2>
-<p><a class="reference internal" href="klist.html#klist-1"><span class="std std-ref">klist</span></a>, <a class="reference internal" href="kdestroy.html#kdestroy-1"><span class="std std-ref">kdestroy</span></a>, <a class="reference internal" href="../user_config/kerberos.html#kerberos-7"><span class="std std-ref">kerberos</span></a></p>
-</section>
-</section>
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- </div>
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- </div>
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- <div class="sidebar">
-
- <h2>On this page</h2>
- <ul>
-<li><a class="reference internal" href="#">kinit</a><ul>
-<li><a class="reference internal" href="#synopsis">SYNOPSIS</a></li>
-<li><a class="reference internal" href="#description">DESCRIPTION</a></li>
-<li><a class="reference internal" href="#options">OPTIONS</a></li>
-<li><a class="reference internal" href="#environment">ENVIRONMENT</a></li>
-<li><a class="reference internal" href="#files">FILES</a></li>
-<li><a class="reference internal" href="#see-also">SEE ALSO</a></li>
-</ul>
-</li>
-</ul>
-
- <br/>
- <h2>Table of contents</h2>
- <ul class="current">
-<li class="toctree-l1 current"><a class="reference internal" href="../index.html">For users</a><ul class="current">
-<li class="toctree-l2"><a class="reference internal" href="../pwd_mgmt.html">Password management</a></li>
-<li class="toctree-l2"><a class="reference internal" href="../tkt_mgmt.html">Ticket management</a></li>
-<li class="toctree-l2"><a class="reference internal" href="../user_config/index.html">User config files</a></li>
-<li class="toctree-l2 current"><a class="reference internal" href="index.html">User commands</a><ul class="current">
-<li class="toctree-l3"><a class="reference internal" href="kdestroy.html">kdestroy</a></li>
-<li class="toctree-l3 current"><a class="current reference internal" href="#">kinit</a></li>
-<li class="toctree-l3"><a class="reference internal" href="klist.html">klist</a></li>
-<li class="toctree-l3"><a class="reference internal" href="kpasswd.html">kpasswd</a></li>
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-<li class="toctree-l3"><a class="reference internal" href="kswitch.html">kswitch</a></li>
-<li class="toctree-l3"><a class="reference internal" href="kvno.html">kvno</a></li>
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-</ul>
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-</ul>
-</li>
-<li class="toctree-l1"><a class="reference internal" href="../../admin/index.html">For administrators</a></li>
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-<li class="toctree-l1"><a class="reference internal" href="../../plugindev/index.html">For plugin module developers</a></li>
-<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>
-<li class="toctree-l1"><a class="reference internal" href="../../formats/index.html">Protocols and file formats</a></li>
-<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>
-<li class="toctree-l1"><a class="reference internal" href="../../resources.html">Resources</a></li>
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