Download ISO File From VirtualBox Server
root@bt:~# wget http://download.virtualbox.org/virtualbox/4.0.8/VBoxGuestAdditions_4.0.8.iso
Mount As CD-Drive
root@bt:~# mkdir /a
root@bt:~# mount -o loop VBoxGuestAdditions_4.0.8.iso /a
root@bt:~# cd /a
Make Install
root@bt:/a# chmod a+x VBoxLinuxAdditions.run
root@bt:/a# ./VBoxLinuxAdditions.run
root@bt:/a# cd
root@bt:~# reboot
Done ! You Can Change Screen Size Now
