fedora 12图形界面root不能直接登录处理   1.首先使用不同用户登录，登录系统后使用su - root切换为root   [baolinchuan@fedora ~]$ su - root  密码：                                                  [root@fedora ~]#    修改配置文件/etc/pam.d/gdm和/etc/pam.d/gdm-password   vim /etc/pam.d/gdm 注释掉文件中的   #%PAM-1.0  auth     [success=done ignore=ignore default=bad] pam_selinux_permit.so  #auth       required    pam_succeed_if.so user != root quiet  auth       required    pam_env.so  auth       substack    system-auth  auth       optional    pam_gnome_keyring.so  account    required    pam_nologin.so  account    include     system-auth  password   include     system-auth  session    required    pam_selinux.so close  session    required    pam_loginuid.so  session    optional    pam_console.so  session    required    pam_selinux.so open  session    optional    pam_keyinit.so force revoke  session    required    pam_namespace.so  session    optional    pam_gnome_keyring.so auto_start  session    include     system-auth   vim /etc/pam.d/gdm-passwd   auth     [success=done ignore=ignore default=bad] pam_selinux_permit.so auth        substack      password-auth #auth        required      pam_succeed_if.so user != root quiet auth        optional      pam_gnome_keyring.so   account     required      pam_nologin.so account     include       password-auth   password    include       password-auth   session     required      pam_selinux.so close session     required      pam_loginuid.so session     optional      pam_console.so session     required      pam_selinux.so open session     optional      pam_keyinit.so force revoke session     required      pam_namespace.so session     optional      pam_gnome_keyring.so auto_start session     include       password-auth ~