This article covers how you can change themes in Ubuntu Linux system. In fact, Gnome Tweaks is tool that lets us tweak the default themes, icons, cursor, extensions and a lot more with ease.
How to install Gnome Tweaks ?
To install Gnome Tweaks, open your terminal (Quick Tip: Press 'ctrl+alt+t' together to open the terminal) and type the following command:
$ sudo apt-get install gnome-tweaks