Kubuntu
Install Flatpak
To install Flatpak on Kubuntu 18.10 (Cosmic Cuttlefish) or later, simply run:
sudo apt install flatpakWith older Kubuntu versions, the official Flatpak PPA is the recommended way to install Flatpak. To install it, run the following in a terminal:
sudo add-apt-repository ppa:alexlarsson/flatpak sudo apt update sudo apt install flatpakInstall the Discover Flatpak backend
The Flatpak plugin for the Software app makes it possible to install apps without needing the command line (available on Kubuntu 18.04 and newer). To install on 20.04 or later, run:
sudo apt install plasma-discover-backend-flatpakOn Kubuntu 18.04, you should run this instead:
sudo apt install plasma-discover-flatpak-backendAdd the Flathub repository
Flathub is the best place to get Flatpak apps. To enable it, download and install the Flathub repository file or run the following in a terminal:
flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepoRestart
To complete setup, restart your system. Now all you have to do is install some apps!