Resolution change in Ubuntu 10.10 using Virtual Box

1. Open terminal ( Application –> Accessories –> Terminal)
2. Type "sudo apt-get update" - provide the root password, above command will check and download the updates available on internet server.
3. Type "sudo apt-get install build-essential linux-headers-$(uname -r)"
4. Type "sudo apt-get install virtualbox-ose-guest-x11"
5. Restart Ubuntu