把sources.list里的ubuntu字段前面加上个k,换成kubuntu之后apt-get update就行了,如果不想再用gnome之类的用apt-get remove gnome然后手动安装一个KDE──apt-get install kde kde-i186 kdm就行啦。sources更改类似如下:
deb http://archive.ubuntu.com/kubuntu hoary-updates main restricted
deb-src http://archive.ubuntu.com/kubuntu hoary-updates main restricted