One of the coolest things about being a Linux user can be showing off your slick custom interface to your friends. With the maturing of Grub 2 and kernel mode setting, we’ll soon all have a beautiful boot from start to finish. The step we’re covering today is customizing GDM, the login manager you likely use if you’re running Ubuntu or any other system with Gnome as your desktop. Well those of you who don’t like the Ubuntu brown can brighten up because there’s no shortage of slick GDM themes available for download. Today, we’ll cover where to get them and how to use them.