Si quieres pasar de tu instalación con GNOME 3 a una con GNOME 2, tan sólo tienes que abrir un terminal y ejecutar los siguientes comandos:
sudo apt-get install ppa-purge
sudo ppa-purge ppa:gnome3-team/gnome3
sudo ppa-purge ppa:ubuntugnometeam/ppa-gen
sudo ppa-purge ppa:ricotz/staging
sudo apt-get update
sudo apt-get install –reinstall gnome-core
sudo apt-get clean
sudo apt-get install –reinstall zenity
sudo apt-get update
sudo apt-get dist-upgrade
Después reinicia el sistema, y lucirás un bonito GNOME 2, donde antes había GNOME 3.
otra forma
Maybe you tried my tutorial on installing GNOME 3 a couple of days ago and perhaps you were infected by the contagion of my excited spaniel mode, and so made GNOME 3 your primary window manager. If you’re now disillusioned with that decision and wish that you had left GNOME 3 in the sandbox (or – even worse – that you’d never read my blog post!!), then read on. Here is how to revert back to GNOME 2 – assuming you followed the steps in my previous tutorial.
Although it was certainly not due to good planning by me, the build and install procedure I posted a few days ago doesn’t actually replace any critical GNOME 2 files, so you can easily switch back if you wish.
It’s remarkably simple, so here is the procedure. Open a terminal window and type:
unlink ~/.local/share/applications/gnome-shell.desktop
This removes the symbolic link to the new GNOME desktop. We can put a link back to the old desktop by typing:
ln -s /usr/share/applications/gnome-shell.desktop ~/.local/share/applications/gnome-shell.desktop
Now all we need to do is change the window manager back:
gconftool-2 -s /desktop/gnome/session/required_components/windowmanager "compiz" -t string
I’m assuming you were using Compiz for compositing, like me. If you were using Metacity, then change the “compiz” string to “metacity”.
Now log out of GNOME – or even better – restart your computer. When it reboots, your familiar GNOME 2 desktop will be back. The sandbox version of GNOME 3 still exists, though, so try opening a terminal window and typing:
cd ~/gnome-shell/source/gnome-shell/src
./gnome-shell --replace
This will replace your current GNOME shell with the sandbox version, so you can still play with GNOME 3 and get the bugs ironed out. A simple CTRL-C in the terminal window will return you to your old desktop.