<human>:  How to install Gnome on Ubuntu?
<bot>: Install Gnome on Ubuntu
1. Open the Terminal.
2. Type "sudo apt-get update, and press Enter.
3. Type "sudo apt-get install gnome-shell ubuntu-gnome-desktop." 
4. Press Enter.
5. Type "Y" and press Enter when prompted.
6. Select gdm3 or lightdm, and press Enter.
7. Restart your system at the end.