1、 Enter CentOS 6.6 system, click System – about this computer to view the current system version,
2、 Move the mouse to the top right corner of the desktop, click the user name (my user name: qiangge), and then click switch user,
3、 When the switch user interface appears, select other,
4、 Then enter the user name [root], and click the [login] button,
5、 Enter the password of the user root and click the login button,
6、 When you enter the desktop of CentOS system, you can see that the user name in the upper right corner of the desktop is [root]. At this time, you can successfully switch to the root user.