<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>.k5login — MIT Kerberos Documentation</title> <link rel="stylesheet" href="../../_static/agogo.css" type="text/css" /> <link rel="stylesheet" href="../../_static/pygments.css" type="text/css" /> <link rel="stylesheet" href="../../_static/kerb.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT: '../../', VERSION: '1.11.4', COLLAPSE_INDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: true }; </script> <script type="text/javascript" src="../../_static/jquery.js"></script> <script type="text/javascript" src="../../_static/underscore.js"></script> <script type="text/javascript" src="../../_static/doctools.js"></script> <link rel="author" title="About these documents" href="../../about.html" /> <link rel="copyright" title="Copyright" href="../../copyright.html" /> <link rel="top" title="MIT Kerberos Documentation" href="../../index.html" /> <link rel="up" title="User config files" href="index.html" /> <link rel="next" title=".k5identity" href="k5identity.html" /> <link rel="prev" title="User config files" href="index.html" /> </head> <body> <div class="header-wrapper"> <div class="header" style="padding-bottom: 0px;"> <h1><a href="../../index.html" style="color: #5d1509; font-size: 120%; padding-top: 10px;">MIT Kerberos Documentation</a></h1> <div class="rel"> <a href="../../index.html" title="Full Table of Contents" accesskey="C">Contents</a> | <a href="index.html" title="User config files" accesskey="P">previous</a> | <a href="k5identity.html" title=".k5identity" accesskey="N">next</a> | <a href="../../genindex.html" title="General Index" accesskey="I">index</a> | <a href="../../search.html" title="Enter search criteria" accesskey="S">Search</a> | <a href="mailto:krb5-bugs@mit.edu?subject=Documentation__.k5login">feedback</a> </div> </div> </div> <div class="content-wrapper"> <div class="content"> <div class="sidebar" style="float: right; background: #F9F9F9"> <h2>On this page </h2> <ul> <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> <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 current"><a class="reference internal" href="index.html">User config files</a><ul class="current"> <li class="toctree-l3 current"><a class="current reference internal" href="">.k5login</a></li> <li class="toctree-l3"><a class="reference internal" href="k5identity.html">.k5identity</a></li> </ul> </li> <li class="toctree-l2"><a class="reference internal" href="../user_commands/index.html">User commands</a></li> </ul> </li> <li class="toctree-l1"><a class="reference internal" href="../../admin/index.html">For administrators</a></li> <li class="toctree-l1"><a class="reference internal" href="../../appdev/index.html">For application developers</a></li> <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="../../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">The Kerberos Documentation Set</a></li> <li class="toctree-l1"><a class="reference internal" href="../../resources.html">Resources</a></li> </ul> <br/> <h4><a href="../../index.html">Full Table of Contents </a></h4> <h4>Search</h4> <form class="search" action="../../search.html" method="get"> <input type="text" name="q" size="18" /> <input type="submit" value="Go" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body"> <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> </div> </div> </div> </div> </div> </div> <div class="clearer" ></div> </div> </div> <div class="footer-wrapper" > <div class="footer" > <div class="right" ><i>Release: 1.11.4</i><br /> © <a href="../../copyright.html">Copyright</a> 1985-2013, MIT. </div> <div class="left" > <a href="../../index.html" title="Full Table of Contents" >Contents</a> | <a href="index.html" title="User config files" >previous</a> | <a href="k5identity.html" title=".k5identity" >next</a> | <a href="../../genindex.html" title="General Index" >index</a> | <a href="../../search.html" title="Enter search criteria" >Search</a> | <a href="mailto:krb5-bugs@mit.edu?subject=Documentation__.k5login">feedback</a> </div> </div> </div> </body> </html>