Installing the Gnome Tweaks Tool

Step 1: Run the following command to install gnome tweaks:

sudo apt-get install gnome-tweaks

Step 2: Now gnome tweaks application has been successfully installed in the Linux Operating system. 

Step 3: While running the above command a lot of processes need to be restarted, therefore if prompted for such press Y.

Step 4: Now the operating system needs to be restarted before the application could be used. Therefore, restart the operating system after the previous step. 

Step 5: Enter the following command in the terminal:

gnome-tweaks

Step 6: A new window similar to this would have appeared:

Step 7: Now select the appearance tab from the left menu.

From this tab, you can change the appearance of your Linux Operating system.

A theme in a Linux operating system is a group of coordinated settings that specifies the visual appearance of a part of the GNOME Desktop. A theme contains settings that affect different parts of the GNOME Desktop, such as controls, window frames, and Icons. In this article, you will learn how to install themes on your Linux Operating system.  For demonstration, the Kali Linux variant of the Debian distribution would be used. But similar methods could be employed to produce such effects in other variants as well. Themes are installed into the Linux Operating system by using the Gnome Tweak Tool. This tool comes built-in in certain distributions of Linux but needs to be installed in others. The process of installing a theme is divided into three parts:

1. Downloading the Gnome Tweaks Tool
2. Installing the Gnome Tweaks Tool
3. Using the tool to change the theme