How to do it...

1. We use the following command to install KDE:

apt-get install kali-defaults kali-root-login desktop-base kde-plasma-desktop

1. Type Y when it asks for confirmation on additional space requirements.
2. Click OK on both the windows that pop up.
3. When the installation is complete, we open a Terminal window and type the following command:

update-alternatives --config x-session-manager

The following screenshot shows the output of the preceding command:

1. Choose the startkde option (in our case, 2) and press Enter.
2. Log out and log in again, and we will see the KDE environment: