How to install kubuntu-desktop

I played with my laptop in struggling to install libgtk2.0-dev. Unfortunately my ubuntu-desktop crashed, I was unable to log-on via the GUI anymore and only able to have the command prompt.

I tried to reinstall ubuntu-desktop but the system doesn't happy at all.

Since I need to get this laptop going immediately, I tried to change the desktop with kbuntu.

here is the command i'm using

sudo apt-get install kubuntu-desktop

I also had to change my network setting to dhcp as well. It was using static before.

auto lo eth0

iface eth0 inet dhcp

iface lo inet loopback