Linux: System password forgot, login not on

You can change the password before logging in by entering single user mode.

The first step:

Restart the system, before entering the system by pressing the "ESC" key in the upper left corner of the keyboard, will enter the following page:

Then press E to enter the edit page

Step Two:

Enter the following page, through the keyboard's upper and lower arrow keys to select kernel that line, and then press E to enter the edit, at the end of the add parameter single, so that the system boot directly into one-user mode, and then enter the save edit, back to the previous step of the interface, click on the keyboard B is the boot system.

Step Three:

After restarting into single user mode, enter passwd to change the password, and then restart the system, you can log in with the new password system

Linux: System password forgot, login not on