How to activate Root login

Open your Te rminal from Applications -> System Tools -> Terminal

-----------Now Login as a root from your terminal

------------Now go to your :-- cd /etc/pam.d/

-------------Then first take a backup of gdm file

***********************cp gdm gdm.bkp


---------------Find and Comment or remove this line into your gdm file
---------------auth required pam_succeed_if.so user != root quiet

Save & Exit From that File.


-----------------Then first take a backup of gdm-password file

***************cp gdm-password gdm-password.bkp


--------------------Find and Comment or remove this line into your gdm file
--------------------auth required pam_succeed_if.so user != root quiet

Save & Exit from File.