The way to reset the root password on centos7 is totally different from Centos 6. Let me show you how to reset the root password in CentOS 7.
1 – In the Boot Grub Menu Select Option to Edit
2 – Select Option to edit (e)
3 – Go to the line of Linux 16 and change ro with “rw init=/sysroot/bin/sh”
4 – Now press “Control+x” to start on single user mode
5 – Now access the system with this command
chroot /sysroot
6 – Reset the password
passwd root
7 – Update selinux information
touch /.autorelabel
8 – Exit Chroot
exit
9 – Reboot your system
reboot
That’s it. Enjoy.
