Enable RH FC 10 root login

My environment: RH FC 10 x86_64

Although it is not recommended to login GNOME GUI as root, sometimes you just need to do it.  Firstly, type the following in your terminal prompt:

1. su

2. Enter your root password
3. vi /etc/pam.d/gdm

and comment the following line:

# auth required pam_succeed_if.so user != root quiet