故障现象：selinux 配置 disabled 后开机卡在滚动条无法进系统
解决思路：单用户模式下修改修改selinux 配置

                       单用户进入方式
1）开机按 键盘   e    进入系统
2）找到 linux16 开始，LANG=zh_CN.UTF-8结尾一行，尾部加                                   （ 空格 加上 selinux=0）
3）然后 ctrl + x 启动，就看到熟悉的登录界面。

修改正确selinux
vim /etc/selinux/config

vim /etc/selinux/config

This file controls the state of SELinux on the system.

SELINUX= can take one of these three values:

enforcing - SELinux security policy is enforced.

permissive - SELinux prints warnings instead of enforcing.

disabled - No SELinux policy is loaded.

SELINUX=disabled

SELINUXTYPE= can take one of three two values:

targeted - Targeted processes are protected,

minimum - Modification of targeted policy. Only selected processes are protected.

mls - Multi Level Security protection.

SELINUXTYPE=targeted

原文地址：http://blog.51cto.com/adcit/2129403