How to install Pantheon desktop on Ubuntu LTS and derivatives?

The Pantheon desktop environment is part of the Linux Elementary OS distribution project which is a derivative of the LTS versions of Ubuntu. Pantheon is developed by the same team that develops Elementary OS.

It is written from scratch with Vala and the GTK3 Toolkit and is widely known for its highly polished look. The design of the Pantheon desktop is very deliberate and extremely functional as it combines some similarities of GNOME 3 Shell with the visual finesse of OS X dock.

The Pantheon desktop environment is very basic as it isIt consists of two elements, the panel and the dock.
By default, you cannot put icons on the desktop and right-clicking on the desktop is disabled.

The panel contains three central areas, at the top of the screen. At the top left is the applications menu. In the center, there is the date and time and finally the system indicators are in the upper right.

At the bottom of the screen is the Dock this works the same way as any other dock since it contains your favorite applications and any applications that are currently open. Applications can be easily added by dragging and dropping from the application menu.

To remove an application from the dock, drag and drop it onto an empty space on your desktop or right-click on the icon and uncheck "Keep in Dock".

Before proceeding to the installation, it is important to mention that the repository for this desktop environment is only available for LTS versions of Ubuntu, so other versions will not be able to use it.

Installation

To install the Pantheon desktop environment on Ubuntu and derivatives, They must follow the instructions we share below.

The first that we are going to do is open a terminal in our system, We can do this with the shortcut "Ctrl + Alt + T" and in it we are going to type the following command to add the repository:

sudo add-apt-repository ppa:elementary-os/stable

Once added to the system, we are going to update our list of packages and repositories with:

sudo apt-get update

Done this now we are going to type the following command:

sudo apt-get install software-properties-common

Finally, to install the desktop environment on our system we have to type the following command:

sudo apt-get install elementary-desktop

With this, the download and installation of the desktop environment in our system will begin. During this process we will be asked which display manager we want to manage, so they can continue using the one they have or use the one offered by Patheon.

At the end of the whole process they can close their user session to start with the new desktop environment that they have just installed. Although it never hurts to perform a restart better.

Setting up Pantheon Desktop

In the beginning Pantheon Desktop was not meant to be personalized. But now it is possible, with a third-party program called Elementary Tweaks.

So if you want to customize your environment you will need to add the following repository to your system:

sudo add-apt-repository ppa:philip.scott/elementary-tweaks

You update your list of packages and repositories with:

sudo apt-get update

And install the tool with the following command:

sudo apt install elementary tweaks

To start using Elementary Tweaks on your system, we just have to go to the system configuration. In case the system configuration does not open, we will have to do the following.
In a terminal we are going to type the following command:

sudo nano /usr/share/glib-2.0/schemas/org.gnome.desktop.interface.gschema.xml

At the end of the file and just before we add the following:

<key type="b" name="ubuntu-overlay-scrollbars">
    <default>false</default>
    
<summary>Overlay Scrollbar</summary>

    <description>Toggle the overlay scrollbar.</description>
</key>

We save with Ctrl + O and close with Ctrl + X. After that we have to reboot the system. With this we can begin to use this tool to configure and personalize the environment to our liking.
But don't wait that long either, since as mentioned, the environment was not intended to be configured by the user, it is simply beautiful and similar to Mac OS.