CentOS Forget root user login password how to do

Boot system, press the ESC key on the keyboard before entering the system, enter the following interface

Press the e key on the keyboard and the following interface appears

Use the arrow keys on the keyboard to move the cursor to the second item, and then press eon the keyboard, enter a space bar, and then enter the number 1, return, the following interface will appear

This time the cursor is positioned in the second item, continue to press the B key above the keyboard, the system will automatically restart,

Now reset the root password

Enter passwd root, carriage return

Require a new password, here enter 123456 carriage return

Enter 123456 return to see passwd: Allauthentication tokens updated successfully. Line

Description Password Modification succeeded

Now reboot the system and enter Shutdown-r to return

After the system automatically restarts, enter the root return, then enter the password 123456, the system login successfully.

At this point, theroot password has been reset to 123456