How To Disable Guest Account In Ubuntu 12.10 - 13.10 - 14.10

Guest account is activated by default in the Ubuntu 12.10, 13.10 ve 14.10 versions.

 

Ubuntu 14.10:

 

To disable the Guest account:

Terminal: sudo sh -c 'echo "[SeatDefaults] \n allow-guest=false" >> /usr/share/lightdm/lightdm.conf.d/50-My-Custom-Config.conf'

 

How to revert the changes (To enabled the Guest account):

Terminal: sudo rm /etc/lightdm/lightdm.conf.d/50-My-Custom-Config.conf

 

Ubuntu 12.10, 13.10 :

 

To disable the Guest account:

Terminal: sudo sh -c 'echo "allow-guest=false" >> /etc/lightdm/lightdm.conf'

 

Result Screenshot: