GNOME (GNU Network Object Model Environment) is a desktop environment created for the operating system GNU / Linux Desktop Environment is recognized as the official GNU project. With the announcement of version 3.0 was introduced GNOME-Shell, which integrates various functions into a 'single window. The desktop area is divided into several parts depending on the activities and workspaces is dynamic: you can add or remove workspaces and you can move any applications in different areas of work, as already happens with Compiz.
First you have to install all the dependencies needed to successfully build and run gnome-shell.
$ sudo apt-get build-dep gnome-shell
After installing all the packages necessary steps for installing veritable gnome-shell
$ sudo apt-get install gnome-shell
Once installed, you can start GNOME-Shell by typing the following command in a terminal:
$ gnome-shell --replace
GNOME-Shell is still under development and therefore very unstable.
Try it in your Test machine or in a Virtual machine.