How to customise LightDM Login Screen in Ubuntu to Remove Guest Account, Remote Login, White dots, Sound effect, and to Change the Background<br /><br />Terminal Commands<br />sudo apt-get install dconf-tools (for Ubuntu 13.04 and before)<br />sudo apt-get install dconf-editor (for Ubuntu 13.10 onwards)<br />sudo cp /etc/lightdm/lightdm.conf /etc/lightdm/lightdm.conf.old <br />sudo /usr/lib/lightdm/lightdm-set-defaults <br /><br />sudo xhost +SI:localuser:lightdm<br />sudo su lightdm -s /bin/bash<br />dconf-editor<br />exit<br />Or use gsettings for Terminal method of editing dconf<br />gsettings set com.canonical.unity-greeter <br /><br />Wallpapers:<br /><a href="http://quidsup.net/?i=twist-in-time" target="_blank" rel="nofollow">http://quidsup.net/?i=twist-in-time</a><br /><a href="http://quidsup.net/?i=mysterious_black_angel" target="_blank" rel="nofollow">http://quidsup.net/?i=mysterious_black_angel</a><br /><a href="http://quidsup.net/?i=BlueLogo-By-Quids" target="_blank" rel="nofollow">http://quidsup.net/?i=BlueLogo-By-Quids</a><br />...<br /><a href="https://www.youtube.com/watch?v=rnvK2TIhYns" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=rnvK2TIhYns</a>