CentOS system password forgot how to crack the password?

1, boot to this interface, press any key

2. Edit Linux boot level by E

3, select the second, and then press E to enter

4, space input 1 or single

5, then return to the Grub interface by return, press B into Single-user mode

6, enter the single user interface input B interface, passwd user name and then enter the password to be modified, prompt all authentication password update successful, so the password on the modification succeeded. After the password modification is complete, enter init 3 into multiuser mode.

Note: If you enter the passwd user name, if you are not prompted to enter a new password, you need to temporarily close the SELinux. Enter the Setenforce 0 command to turn off SELinux so that you can change the password in single-user mode.