Kubuntu is an official derivative of the Ubuntu operating system using the KDE Software Compilation instead of the GNOME
graphical environment. It is part of the Ubuntu project and uses the
same underlying system. It is possible to run both the KDE desktop
(kubuntu-desktop) as well as the Gnome desktop (ubuntu-desktop)
interchangeably on the same machine. Every package in Kubuntu shares
the same repositories as Ubuntu. It is released regularly on the same schedule as Ubuntu.