[Original] install and uninstall Gnome3.8 in Ubuntu13.04

Add GNOME 3 PPA (Personal Package Archives)

Let's first give UbuntuSoftware SourcesAdded GNOME 3 PPA.This can be done without using the command line, but it is much easier to do so for the sake of simplicity.

Open a new Terminal window and enter the following command carefully.

sudo add-apt-repository ppa:gnome3-team/gnome3

Upgrade or install GNOME Shell

After PPA is added, You need to perform one of the two steps based on your installation.

If youNoInstall GNOME Shell, execute the following command in a new terminal program, and enter your password at the prompt:

sudo apt-get update && sudo apt-get install gnome-shell ubuntu-gnome-desktop

Based on the various packages installed, the following interface is displayed, asking which display manager you choose-"Logon screen"-Ubuntu should be used:

Both options allow you to select a session before Logon (so you can log on to the Unity environment if you want ). 'Lightdm' is the default Ubuntu option, but for a real GNOME experience, such as getting locked screen notifications, you have to chooseGNOMEDisplay Manager(GNOME Display Manager is also known as running the machine group running the machine)

 

LightDM and gmt1:

If you have installed GNOME Shell or are using Ubuntu GNOME, run the following command:

sudo apt-get update && sudo apt-get dist-upgrade

Optional Staging PPA for extra bits

If you are very careful, you can also increaseGNOME 3 Staging PPA. However, many of its components are unstable-this is a big problem that you must pay attention.

Restart and log on

That's All-you have done it all. Make sure everything is as smooth as possible and you can restart it.

If you use the default Unity logon interface, click Ubuntu in the user area, select 'gnome 'session, and continue and log on as usual.

If you want to select GNOME Display Manager, select 'gnome 'from the session drop-down menu before logon '.

If everything works, you will see a page like this...

Uninstall GNOME 3.8

To uninstall the GNOME Shell desktop, we need to do something.

First install PPA Purge from Ubuntu Software Center

Install PPA Purge

Next, open a new terminal window and run the following command:

sudo ppa-purge ppa:gnome3-team/gnome3

Note any prompts on the terminal during the downgrade process. If you have also installed GNOME 3 Staging PPA (see the previous section), you also need to run:

sudo ppa-purge ppa:gnome3-team/gnome3-staging

Next, run the following command to uninstall GNOME Shell:

sudo apt-get remove gnome-shell ubuntu-gnome-desktop

Clear any residual applications that have not been downgraded or detached, and restart.