Install VirtualBox’s guest additions are relativly stright forward in Ubuntu. But for Kubuntu 10.04 it’s takes a little more work.
Open the terminal and execute the following commands. First, check to make sure the system is up to date.
sudo apt-get update sudo apt-get upgrade
Restart the system after these have been installed. Next we need to install and get a few things.
sudo apt-get install dkms sudo apt-get install build-essential
Restart the system again.
Now we can install the guest additions. Devices -> Install Guest Additions… Virtual CD should mount automatically.
cd /media/VBoxLinuxAdditions_x sudo ./VBoxLinuxAdditions.run
Install might take a little while to compile. After it has completed, restart the system. Guest additions have now been successfully installed.