Install Unity Desktop in Ubuntu 18.04

After installing Ubuntu 18.04, i have several small issues with new Gnome desktop, most of it i solved with plugins. But i decided to switch back to Unity desktop as for a while until i am ready to Gnome desktop.

To install Unity Desktop in Ubuntu 18.04, run

You will be asked to select display manager. Select lightdm.

To make it look like Ubuntu 16.04, i copied old wallpaper used by Ubuntu 16.04