http://linuxexchange.org/questions/1046/login-problem-in-rhel-60-beta<p>I have downloaded RHEL 6 beta from www.redhat.com site and installed it on my PC successfully. When I want to login with root in GNOME/KDE, the system gives me a error message that <em>AUTHENTICATION FAILED</em> and I'm unable to login while I can login with root from terminal/text mode.</p> <p>But I can login with other user or local user successfully.</p> <p>Please help me and solve my this problem.</p>enTue, 20 Jul 2010 18:00:16 -0400http://linuxexchange.org/questions/1046/login-problem-in-rhel-60-beta/1109<p>rfelsburg is right - your permission comes from gdm. Changing that gives you a root GUI.</p> <p>HOWEVER...</p> <p>Just in case you're a newbie...</p> <p>Most distros DO NOT ALLOW one to login as root, only to su to root after logging in. Blocking root login is a common security practice (Fedora does it, for instance.) </p> <p>Allowing root login is a big security hole - anyone can come in over the net and bang away at your login screen. If they can login as root, you've just handed them the keys to your castle. By making it a two-step process you've at least slowed them down and left more tracks in your system logs. </p> <p>see: <a href="http://www.cyberciti.biz/tips/linux-security.html" rel="nofollow">http://www.cyberciti.biz/tips/linux-security.html</a> Look at item #7</p> <p>or <a href="http://www.howtogeek.com/howto/linux/security-tip-disable-root-ssh-login-on-linux/">http://www.howtogeek.com/howto/linux/security-tip-disable-root-ssh-login-on-linux/</a></p> <p>Good Luck.</p>DBATue, 20 Jul 2010 18:00:16 -0400http://linuxexchange.org/questions/1046/login-problem-in-rhel-60-beta/1109http://linuxexchange.org/questions/1046/login-problem-in-rhel-60-beta/1047<p>First off: The usual lecture about not using root for routine tasks, or use sudo if you need to. Now your actual problem.</p> <p>It sounds like your login manager is not letting you login as root, which means either gdm, or kdm.</p> <p>Their was a change made in fedora that fits this description. I know they disabled root logins via gdm and pam.</p> <p>For Gnome:</p> <p>Look at /etc/pam.d/gdm</p> <p>Look for the line:</p> <p>auth required pam_succeed_if.so user != root quiet</p> <p>If it's there make a copy of the original file, and delete the line.</p> <p>If your using kde, youll need to look at your kdmrc file, and change AllowRootLogin to true</p>rfelsburgTue, 13 Jul 2010 15:49:55 -0400http://linuxexchange.org/questions/1046/login-problem-in-rhel-60-beta/1047