Unity desktop environment installed in Ubuntu 18.04 operating system
Run the following two commands in the terminal, you can default from the official repositories installed Unity:
sudo apt update
sudo apt install ubuntu-unity-desktop
During installation, you can select the default display manager, Unity can choose to display the login screen lightdm display manager, gdm Gnome desktop is the default display manager:
After installation is complete, restart the computer on it:
sudo shutdown -r now
Now you can see the familiar Unity login screen:
Now Ubuntu 18.04 default desktop environment is Unity, you can click on the icon to select Ubuntu desktop environment you want to use:
If you are upgrading from Ubuntu 16.04 / 17.10 to Ubuntu 18.04 login screen and was replaced Gnome desktop environment login screen, you can log in to restore the Unity interface by running the following command:
sudo dpkg-reconfigure lightdm
So far, Unity Desktop so installation is complete:
View Unity in Ubuntu 18.04 version of the operating system
You can use the tool to see screenfetch Unity desktop version:
sudo apt install screenfetch
screenfetch
Of course, you can also use the following command to see:
unity --version
After installing Unity you can install unity-tweak-tool:
sudo apt install unity-tweak-tool
Uninstall the GNOME desktop system from Ubuntu 18.04
Uninstall Gnome is very simple, run the following command in the terminal system:
sudo apt remove gnome-shell --purge