October 30th, 2012 
Jijo K Jose
Here’s a quick way to hide the guest account from the logon screen.
To get started, press Ctrl + Alt + T on your keyboard to open the terminal. When it opens, run the commands below to hide the guest account from the logon screen.
sudo sh -c 'echo "allow-guest=false" >> /etc/lightdm/lightdm.conf'
Restart your computer and the guest account should be gone.
