There may be some times you forgot your root password and want to reset.So here is the guide to reset your root password in CentOS 7. To achieve this you have to boot your system in single user mode.
After that chroot your system
chroot /sysroot
reset the root password.
passwd
Update SELinux information.
touch /.autorelabel
Exit chroot
exit
Reboot your system.
reboot
Login with your new password.
That’s all there is to do and it is that simple to reset root password in centOS 7. Hopefully that helps and do comment below sharing your thoughts and experiences