Install kde-plasma-desktop by entering the following commands in the terminal:
sudo apt update sudo apt install kde-plasma-desktop
Description:
KDE Plasma Desktop and minimal set of applications
KDE is the powerful, integrated, and easy-to-use Free Software desktop platform and suite of applications. . This metapackage pulls in the core modules released with the KDE Software Compilation including the basic KDE Plasma Desktop, minimal set of basic applications (browser, file manager, text editor, system settings, panel, etc.), important libraries and data.
Homepage: http://www.kde.org
Version: 5:100ubuntu2
Section: universe/metapackages