What should I do if I forget the root password?

Article Title: What should I do if I forget the root password ?. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.

Enter the system as a single user, modify the root password, and then restart.

The procedure is as follows: 

For LILO:When the system starts to display the LILO boot screen, press TAB for the graphic Boot Mode to enter the text mode, and then enter linux single press enter at LILO to enter the password-free console, use the passwd command to change the root password.
For GRUB:When the system starts to display the GRUB boot screen, press the e key to enter the GRUB editing status. Press the on or down key to select the appropriate boot item. After selecting a boot item, press the letter e to go to the command line editing page. After the command line appears, add "Space single" and press enter to return the editing status. then press the letter B to start the system as a single user, after entering the system, use the passwd command to change the root password.