Installing VirtualBox Guest Additions in Ubuntu

in guest:
install dkms & gcc if not already:
sudo apt-get install dkms gcc


install generic kernel headers
sudo apt-get install linux-headers-$(uname -r)
uname string passes kernel version to apt


download/mount guest adds .iso, cd to .iso and:
sudo .sh ./VBoxLinuxAdditions-x86.run install
reboot guest, gtg