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1, the system starts, and when the screen starts GRUB2 i.e., the display screen shown in FIG. Press "↑ ↓" key to stay in this interface, press the "e" key to enter the edit mode
2, to find the beginning of the period "linux16", add "init = / bin / sh" after "UTF-8", while the need to remove "rhgb" and "quiet" parameter
3, press "Ctrl + X" to restart the system, without requiring a password to enter the system at this time, as FIG.
4, in a way remount rw "/", otherwise no write permission
1 mount -o remount,rw /
5, "passwd" plus the username of the form to modify user password
1 passwd root
6, run the command "touch / .autorelabel" the selinux take effect, or it may not start, then run "exec / sbin / init" reboot the system
1 touch /.autorelabel 2 exec /sbin/init