Maybe he's using a different machine to post here.
Originally Posted by KCG102282
Unfortunately, KCG102282 is half right. It is possible to do it without your ubuntu machine having internet access. But you will need to use a computer that is online.
You can use APTonCD. Make the CD, then run this command:
ubuntu-desktop is a meta-package - installing it will also install a heap of Gnome-based applications.
sudo apt-get install ubuntu-desktop
As for removing Kubuntu... I don't know an easy way to do this. As far as I know, running
will not remove the KDE-based apps. It may be easier to just download the ubuntu live cd .iso and install ubuntu over your kubuntu installation.
sudo apt-get remove kubuntu-desktop