Lubuntu is a light, fast, and modern Ubuntu flavor using LXQt as its default desktop environment.

What desktop environment does Ubuntu 18.04 use?

Ubuntu now uses GNOME Shell as its default desktop environment. Some of Unity’s stranger decisions have been abandoned, too. For example, the window management buttons (minimize, maximize, and close) are back to the top right corner of each window instead of the top left corner.

What is the default Ubuntu desktop environment?

From Ubuntu 17.10, GNOME Shell is the default desktop environment. From Ubuntu 11.04 to Ubuntu 17.04, the Unity desktop interface was the default. A number of other variants are distinguished simply by each featuring a different desktop environment.