Installing a desktop theme is something that many users do when they have a new operating system on their desktops. It is something typical and logical on the part of many.
But it is not something so easy on certain Gnu / Linux desktops, at least it is not easy if it is not known. Next we are going to explain how to install a theme in gnome and use it. Something that will be easier from this tutorial.
First we have to install the Gnome Tweak Tool. This tool is quite interesting to customize Gnome and it will be of great help to customize it in an easy way. Gnome Tweak Tool is found in several official distribution repositories, so it can be done through the distribution software manager (apt-get, yum, dnf, etc ...)
Gnome-Look is a secure repository where we will find desktop themes for Gnome
Once we have the Gnome Tweak Tool installed, we have to find a desktop theme that we like. In Plasma and Cinnamon we have the option of looking for it from the application itself, but in Gnome we have to go to external repositories.
A good repository of themes for Gnome is Gnome-Look, a website with many elements to customize our desktop, including themes for Gnome.
Once we have the theme chosen and downloaded. We have to unzip it in the folder .themes from our Home folder. If you want to customize the icons and fonts, we have to unzip these elements in the folders .icons in the case of icons and .fonts in the case of desktop fonts.
Once this is done, we now have to tell Gnome that the new theme will have to be used. For this we will use the Gnome Tweak Tool where the new downloaded theme will appear. We select it and press the apply button. And ready. With this we have already installed a new desktop theme for Gnome.