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<li><a class="reference internal" href="#">.k5login</a><ul>
<li><a class="reference internal" href="#description">DESCRIPTION</a></li>
<li><a class="reference internal" href="#examples">EXAMPLES</a></li>
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<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>
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<div class="section" id="k5login">
<span id="k5login-5"></span><h1>.k5login<a class="headerlink" href="#k5login" title="Permalink to this headline">¶</a></h1>
<div class="section" id="description">
<h2>DESCRIPTION<a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2>
<p>The .k5login file, which resides in a user’s home directory, contains
a list of the Kerberos principals. Anyone with valid tickets for a
principal in the file is allowed host access with the UID of the user
in whose home directory the file resides. One common use is to place
a .k5login file in root’s home directory, thereby granting system
administrators remote root access to the host via Kerberos.</p>
</div>
<div class="section" id="examples">
<h2>EXAMPLES<a class="headerlink" href="#examples" title="Permalink to this headline">¶</a></h2>
<p>Suppose the user <tt class="docutils literal"><span class="pre">alice</span></tt> had a .k5login file in her home directory
containing the following line:</p>
<blockquote>
<div><div class="highlight-python"><pre>bob@FOOBAR.ORG</pre>
</div>
</div></blockquote>
<p>This would allow <tt class="docutils literal"><span class="pre">bob</span></tt> to use Kerberos network applications, such as
ssh(1), to access <tt class="docutils literal"><span class="pre">alice</span></tt>‘s account, using <tt class="docutils literal"><span class="pre">bob</span></tt>‘s Kerberos
tickets.</p>
<p>Let us further suppose that <tt class="docutils literal"><span class="pre">alice</span></tt> is a system administrator.
Alice and the other system administrators would have their principals
in root’s .k5login file on each host:</p>
<blockquote>
<div><div class="highlight-python"><pre>alice@BLEEP.COM
joeadmin/root@BLEEP.COM</pre>
</div>
</div></blockquote>
<p>This would allow either system administrator to log in to these hosts
using their Kerberos tickets instead of having to type the root
password. Note that because <tt class="docutils literal"><span class="pre">bob</span></tt> retains the Kerberos tickets for
his own principal, <tt class="docutils literal"><span class="pre">bob@FOOBAR.ORG</span></tt>, he would not have any of the
privileges that require <tt class="docutils literal"><span class="pre">alice</span></tt>‘s tickets, such as root access to
any of the site’s hosts, or the ability to change <tt class="docutils literal"><span class="pre">alice</span></tt>‘s
password.</p>
</div>
<div class="section" id="see-also">
<h2>SEE ALSO<a class="headerlink" href="#see-also" title="Permalink to this headline">¶</a></h2>
<p>kerberos(1)</p>
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