the psycho cat on an HP Mini with Ubuntu
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Installing Gnome on Kubuntu
Kubuntu's default desktop environment is KDE. Sometimes people using Kubuntu want to try out Gnome as well, though. If you're not sure what the differences are, read this comparison of KDE and Gnome.
Warning: having KDE and Gnome together means you'll have cluttered application menus full of KDE applications and Gnome applications. You may also run into some other cosmetic problems (the KDE QT look taking over some of your Gnome themes, a hidden file on your desktop that keeps appearing in Gnome after you've just logged out of KDE).
Even though these instructions are for Gnome, the same principle applies for adding KDE to Ubuntu or XFCE to Kubuntu or Ubuntu. Basically, you install the desktop environment, log out, and choose the desktop environment from the available login sessions.
In theory, you can use KPackageKit to install Gnome, but I couldn't get it to work. I don't know if it's some weird bug in Kubuntu 9.04 (the version I used for these screenshots) or if I just don't know how to use KPackageKit. The terminal pretty much always works, so I'm going with the terminal. Don't worry. You can copy and paste commands with your mouse. You do not need to type anything.
sudo apt-get update && sudo apt-get install ubuntu-desktop
If you're pretty sure you want to keep Gnome, you don't have to copy the list of packages.
Either way, when you are ready to start the installation, type y to confirm.
The default can always be changed later by modifying the /etc/X11/default-display-manager file. For KDM, the file should read /usr/bin/kdm; for GDM, the file should read /usr/sbin/gdm
If you want to switch back to KDE, just log out, select KDE from the session menu and log back in again.
Last updated 11/13/10 12:05
I will not give help to people posting in the above places. If you require technical support, start a support thread on the Ubuntu Forums. That is the appropriate place to ask for help.