This is outdated. Officially it's recommended to use system-wide Flatpak, without //--user//: https://docs.flatpak.org/en/latest/using-flatpak.html#system-versus-user ====== Search for package ====== flatpak --user search octave ====== Install package ====== flatpak --user install flathub org.octave.Octave ====== Show all installed packages ====== flatpak --user list ====== Update all packages ====== flatpak --user update ======= More ======= List only installed applications, without runtimes: flatpak list --app List only installed runtimes, without applications: flatpak list --runtime Remove un-used runtime libraries: flatpak uninstall --unused Remove application and all its data: flatpak uninstall --delete-data org.Gnome.Todo Fix broken package: flatpak repair