Edit the sources.list file, e.g. by opening a terminal and typing:
sudo nano /etc/apt/sources.list
Add this line:
deb http://ubuntu.beryl-project.org/ edgy main deb-src http://ubuntu.beryl-project.org edgy main
For the GPG key (to ensure that the packages are authentic) run this command:
sudo wget http://ubuntu.beryl-project.org/root@lupine.me.uk.gpg -O- | sudo apt-key add -
Update the package list before installing
sudo apt-get update
On the official beryl wiki page there are steps listed to activate AIGLX which is installed by default in edgy, but apparently the beryl team think you have to activate it, i skipped this step because the first time i installed beryl, this is what crashed my system, the second time i installed it it worked, i didn’t use the experimental repositories at all, if you want to follow those steps, get them from the beryl install guide, see the ref’s at the bottom of the page.
Install Beryl
Simply type
sudo apt-get install beryl
You’ll also need themes for the decorations
sudo apt-get install emerald-themes
Starting Beryl
Type, in terminal or launcher
beryl-manager