KDE Plasma is one of the most popular Desktop Environments available for Linux Desktop users. Debian doesn’t come with KDE edition with every new release but you can easily install KDE Desktop Environment on Debian 10 (Buster).
This installation is for users running a Desktop version of Debian 10 (Buster). If you’re running Debian 10 in Cloud, or a hypervisor without GUI, or doesn’t want to have GUI, this installation is not for you.
Install KDE Desktop Environment on Debian 10 (Buster)
Install KDE Desktop on Debian 10 (Buster) from official upstream repositories added during installation.
sudo apt -y install task-kde-desktop
After the installation, logout or reboot to start enjoying KDE Desktop Environment on Debian 10 Buster.
$ logout or $ reboot
Use the Desktop Environment switcher on the Login screen to pick KDE Plasma.
You’re now in KDE world.