How do you change the default desktop environment in Ubuntu?

To change the default desktop environment in Ubuntu, you can follow these steps:

1. Open the terminal (Ctrl + Alt + T).
2. Use the following command to install a new desktop environment, such as Xfce desktop environment:

sudo apt-get install xubuntu-desktop

1. After installation is complete, restart the system.
2. On the login screen, click on the gear icon in the top right corner and select “Xfce Session” or another desktop environment that you have installed.
3. Please enter your password to log into the system.
4. If you want to switch back to the original desktop environment, you can select it on the login screen again.

Note: Changing the default desktop environment may cause system issues, it is recommended to backup important data before proceeding.