There are several distributed versions of Ubuntu. These include Edubuntu and Kubuntu, both of which are Ubuntu but with a different default environment. Kubuntu is Ubuntu with, however, another very popular desktop environment for Linux called KDE.
This guide is how to totally install Kubuntu desktop and fully uninstall Ubuntu desktop meta-package. Remember, your Ubuntu system will not continue to be an Ubuntu system and offer the GNOME desktop. Your Ubuntu system will be a Kubuntu system and offer KDE desktop instead. But I will give you alternative choice to keep your Ubuntu system continue to be an Ubuntu system and offer the GNOME desktop and you will also have access to the KDE desktop and all the applications that come with a Kubuntu system. Feel free to make your own choice.
Installing the Kubuntu Desktop
Open a terminal shell window, you can type the following:
sudo apt-get install kubuntu-desktop
The download can take some time. After the download is complete, the packages are prepared and the installation proceeds. If you are lucky enough to have a good, high-speed Internet connection, the first part of the Kubuntu desktop installation may have seemed pretty speedy. Now it’s time to install the download packages, which can also take a fair bit of time.
Somewhere in the course of the packages installation, a window pops up asking you to make a decision on your choice of login manager. The default login manager for Kubuntu is KDM. Therefore change your default login manager from GDM to KDM. Just click the drop-down list and select KDM. Then click Forward to reconfigure.
You’re finished. You can safely log out or even want to reboot your system given the number of changes that have occurred. Go a head When the login manager comes back up, you have to manually select KDE as your desktop environment.
At this point, you can stop if you want to keep your Ubuntu system continue to be an Ubuntu system and offer both the GNOME desktop and KDE desktop. You can choice using Ubuntu or Kubuntu when you log in. But if you want fully turning Ubuntu into Kubuntu, you can follow the next step.
Uninstalling The Ubuntu Desktop
To uninstall all the other junk, open up a terminal and copy and paste this into your terminal:
sudo apt-get remove bluez-pin bug-buddy contact-lookup-applet dbus-1-utils desktop-file-utils eog esound evince evolution evolution-exchange evolution-plugins evolution-webcal file-roller firefox firefox-gnome-support gaim gamin gcalctool gconf-editor gdm gedit gimp gimp-python gnome2-user-guide gnome-about gnome-app-install gnome-applets gnome-btdownload gnome-control-center gnome-cups-manager gnome-games gnome-icon-theme gnome-media gnomemeeting gnome-menus gnome-netstatus-applet gnome-nettool gnome-panel gnome-pilot-conduits gnome-session gnome-spell gnome-system-monitor gnome-system-tools gnome-terminal gnome-themes gnome-utils gnome-volume-manager gstreamer0.8-esd gstreamer0.8-gnomevfs gthumb gtk2-engines-clearlooks gtk2-engines-industrial gtk2-engines-mist gtk2-engines-smooth gucharmap hal-device-manager hwdb-client language-selector libesd-alsa0 libglib2.0-data libgnome2-perl libgstreamer-gconf0.8-0 libpt-plugins-v4l libpt-plugins-v4l2 metacity nautilus nautilus-cd-burner nautilus-sendto notification-daemon openoffice.org2-evolution openoffice.org2-gnome python-glade2 python-gnome2 python-gst python-gtk2 rhythmbox rss-glx scrollkeeper serpentine smeg sound-juicer ssh-askpass-gnome synaptic totem tsclient ubuntu-docs ubuntu-sounds update-notifier vino xchat xsane xscreensaver xscreensaver-gl xvncviewer yelp zenity
Well done! Your Ubuntu turn into Kubuntu now. Have a great day!