Originally Posted by asifbasha
i am new to this community ,when the first time i installed fedora 9 i set default desktop environment as GNOME ,but i want to install KDE desktop environment. what i have to do now , do i have to reinstall the fedora 9 operating system,please reply me
It's not necessary to reninstall as both desktops can coexist. The first thing you need to do is download and install KDE from your package manager, presuming that you are eithger going to log on as root or as a superuser. Once that's done, log out to the user sign on screen and click on Options and Change Session. Select KDE and then log on again with your user name and pasword. As soon as that happens you'll be prompted as to whether you want to make KDE default or not. Don't make it default just yet, start KDE and check that it's all working properly and that you've installed everything necessary to get it up and running.
Once you're happy and you want to make KDE default, log out, click options > change session > KDE, log on and this time make it default. You can change it back to Gnome later on if you want but I have found that once you start messing around with customising KDE menus, it scrambles the alacarte menus in Gnome. That seems to be about the worst that using two desktops does although doubtless there's someone out there who will probably think of a few others. Of course, you can still run all your Gnome based software under KDE provided you don't uninstall Gnome.