#When you forget root password, there is a way to set a new password accessing the console after booting or restarting the system. When grub load, edit the line kernel and add in the end of kernel parameters: init=/bin/bash The system will go up without requesting root password like in single user. After the system is up, re-mount / filesystem # mount -o remount,rw / Now the / filesystem is accesible and you can change root password with: # passwd root   Now reboot the machine Read more...