How to Disable Ubuntu Guest user

Ubuntu come with a Guest user account, which allows anyone to log into machine from the login screen and no password will be asked. which is not recommended in production servers, but no worry we have solution to disable the Guest user in Ubuntu.

To Disable Guest user Just open Terminal and run the below command to edit the file:

sudo vi /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf

Add the following line and save it.

allow-guest=false

Reboot, and verify.