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Like myself you may get tired of looking at the default Kali linux theme. This article will walk you through installing a custom theme to brighten (or darken) things up a bit. It’s super simple and shouldn’t take more than 5 minutes.

We will:

1. Install Gnome Tweak Tool
2. Locate your desired theme on Gnome Look http://gnome-look.org/
3. Download the theme and copy it into /usr/share/themes
4. Activate it in Gnome Tweak Tool

 

To install Gnome Tweak Tool simply run the following from Terminal.

install-gnome-tweak


Note: If your kali installation cant find the following package (you would get an error stating “unable to locate package”) you most likely need to update/fix your sources.list.  Here is the official docs on how to fix this. http://docs.kali.org/faq/kali-sources-list-faq 

After the Gnome Tweak Tool is installed, you can open it from the Application menu, or from terminal. It’s located in the GUI menu at   Applications > System Tools > Preferences > Advanced Settings

gtw-in-menu

You can also open the Gnome Tweak Tool (hereby referenced to as GTT) from terminal by simply running

 

As you can see, here within the GTT you can change the theme settings.
gtt-menu

Now you can surf around the Gnome Look website http://gnome-look.org/  and locate a GTK3 theme you are interested in using. For this article I am going to use Mediterranean Night found here: http://gnome-look.org/content/show.php/MediterraneanNight+Series?content=156782   . The downloaded file is a tar file, so we will need to first change directories to the download location. Assuming your logged in as root and downloaded the file with your browser It should be in /root/Downloads

theme-downloaded

Note: CD is for changing directories. I changed into the /root/Downloads directory because that’s where I downloaded my theme to. Yours could be different.

Then, since this file is compressed we need to decompress it with tar by running

-x for eXtract     -v for Verbose      -f for File
The name of my theme is MediterraneanNight, again yours could be different if you are using a different theme.

 

Once the files for the theme are decompressed and extracted you can copy them into the /usr/share/themes directory. You can do this with the file manager GUI, or via the command line.

moving-the-themes

mv – move (rename) file.
rm – remove directories or files.

Once the new theme files are located in /usr/share/themes/ directory you can enable them via the GTT.
enabling-new-theme-in-gtt

 

After a little trial and error and a new background image here is what I came up with
new-theme-active-desktop