How To Install Gnome Desktop Environment in Ubuntu 16.04
In this tutorial, you will see how to get a GNOME environment in Ubuntu 16.04.
If you want to have a Gnome Desktop Environment instead of Unity to have a different interface in your Ubuntu 16.04 , in this tutorial we show you how to do it. It will not take long and it does not have much complication, let’s go to it.
How to install Gnome on Ubuntu
To take the installation out we will follow the following steps.
First we will make sure that everything is updated, for it executes the following 2 commands:
sudo apt-get update sudo apt-get dist-upgrade
Now we will install gnome, we will see that we can install only the desktop with the following command:
sudo apt-get install gnome-panel
Or complete running:
sudo apt install gnome
Once we have everything, we restart Ubuntu, you can do it from the terminal, for it execute:
sudo reboot
Once the operating system is rebooted and in the Login screen, click where indicated in the following image:
There will be the option to choose Gnome and the one that comes by default, I select Metacity:

When entering the operating system we will see how we have the Ubuntu desktop:
How to update to Gnome 3.20
If you already have Gnome in Ubuntu, it is likely that you come with Gnome 3.18, if you want to upgrade you can follow these steps.
We add the Gnome 3 repository:
sudo add-apt-repository ppa:gnome3-team/gnome3-staging
We update with the following commands:
sudo apt-get update sudo apt dist-upgrade
Now we will go to restart the system. We restart Ubuntu from the console, as it was said before executing:
sudo reboot
How to return to Gnome 3.18
This is done very easy; you will only have to run the following 2 commands:
sudo apt install ppa-purge sudo ppa-purge ppa:gnome3-team/gnome3-staging