Gnome 3 is now finally available. However it will take some time before major Linux distributions start integrating Gnome 3 Desktop into their systems. Mean while, you can try Gnome 3 using a Live CD for your favourite Linux distribution. In case you are looking to install Gnome 3 Desktop on your Ubuntu 11.04 system in order to get a better feel, then here is a tutorial for you.
ATTENTION: We would like to say before hand that installing Gnome 3 on your system may break it and render many things un-usable as the Gnome 3 repository is highly unstable even now. So in case you are planning to install Gnome 3 on your production system, we would recommend you to hold on till your distribution comes out with a supported version of Gnome 3.
Installing Gnome 3 Desktop in Ubuntu 11.04 Natty Narwhal
Step 1: Install the Gnome 3 team's Ubuntu PPA (repository) using this command:
sudo apt-add-repository ppa:gnome3-team/gnome3
Step 2: Now update your software sources:
sudo apt-get update
Step 3: Install the Gnome 3 Desktop environment using this command:
sudo apt-get install gnome-desktop3
If the above does not work for you, then you can try the following, as suggested by Aechols in the comments. (Please not we have not tested these steps, which the above mentioned user has talked about)
sudo apt-get remove gnome-accessibility-themessudo apt-get dist-upgrade sudo apt-get install gnome-shell sudo apt-get install gnome3-session
Installing Gnome 3 Desktop in Ubuntu 10.10 Maverick Meerkat
Gnome 3 Desktop can be installed in Ubuntu 10.10 Maverick using the following commands. Please note that this PPA (For Ubuntu 10.10) is old and hasn't been updated unlike Natty and there is NO WAY TO ROLL BACK!
sudo add-apt-repository ppa:ubuntu-desktop/gnome3-builds sudo apt-get update sudo apt-get install gnome-desktop3
Reboot your computer after the installation is over so that the new components and the environment can sink in properly. In case you are facing a problem or want to report a bug, you can do it here.