At the request of many of our readers, we decided to write the following tutorial to teach Ubuntu users how to install the very popular and gorgeous Arc GTK theme in the latest Ubuntu 16.04 LTS (Xenial Xerus) operating system.

First of all, we would like to take a moment and say that it has been a year since we first introduced you guys to the Arc GTK theme, during which it became one of the most requested and loved Linux desktop themes, adopted lately by numerous GNU/Linux operating systems, including the upcoming Linux Mint 18 “Sarah.”

Now that Ubuntu 16.04 LTS is out, and it began invading users’ computers as the latest, most advanced and reliable Ubuntu release ever, many of you want to fully customize it with third-party GTK and icon themes. And, of course, Arc GTK theme and Moka icon set are amongst the most requested ones these days.

Here’s how to install Arc GTK theme in Ubuntu 16.04 LTS

Therefore, if you are one those who want to install the Arc GTK theme and join the latest trends, you have some good news for you, and you’ll only have to run a couple of commands in the Terminal app, so make sure that you open it right now and paste the following line of code to add the Arc GTK theme repository.

sudo sh -c "echo 'deb http://download.opensuse.org/repositories/home:/Horst3180/xUbuntu_16.04/ /' >> /etc/apt/sources.list.d/arc-theme.list"

But in order for the above repository to work correctly and for you to receive regular updates for your Arc GTK theme packages, you will also need to install the repository key. Otherwise you won’t be able to use the repo. As such, copy/paste the following two lines of code in the Terminal app.

wget http://download.opensuse.org/repositories/home:Horst3180/xUbuntu_16.04/Release.key
sudo apt-key add - < Release.key

While the first line of code will download the official Arc GTK theme repository key, the second one will install it on your system to enabled the software repo, so you should see an “OK” message if everything has been correctly installed. Finally, now you are ready to install the Arc GTK theme, so run the following command.

sudo apt update && sudo apt install arc-theme

Once the Arc GTK theme has been successfully installed, you’ll need to activate it using the Unity Tweak Tool, which you can install from the main Ubuntu 16.04 LTS repositories using the “sudo apt install unity-tweak-tool” command or via the Ubuntu Software app.

Open Unity Tweak Tool, click on the “Theme” icon under the Appearance section, and select one of the Arc GTK themes that suits your needs (Arc, Arc-dark, or Arc-darker). Below you can see them all in action, but we have to admit that our favorite one is Arc-darker. Enjoy!

Arc GTK theme

Arc GTK theme
Arc-dark GTK theme

Arc-dark GTK theme
Arc-darker GTK theme

Arc-darker GTK theme

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