How to reset root user password from boot in CentOS 7
This video covers the way to reset the root password on centos7 is totally different to Centos 6. Let me show you how to reset root password in CentOS 7.
For more explanation on this video: https://www.linuxhelp.com/how-to-reset-root-user-password-from-boot-on-centos-7/
centos 7