4 Guest Additions sh ./VBoxLinuxAdditions.run For your convenience, we provide the following step-by-step instructions for freshly installed copies of recent versions of the most popular Linux distributions. After these preparational steps, you can execute the VirtualBox Guest Additions installer as described above. Ubuntu 1. In order to fully update your guest system, open a terminal and run apt-get update as root followed by apt-get upgrade 2. Install DKMS using apt-get install dkms 3. Reboot your guest system in order to activate the updates and then proceed as described above. Fedora 1. In order to fully update your guest system, open a terminal and run yum update as root. 2. Install DKMS and the GNU C compiler using yum install dkms followed by yum install gcc 3. Reboot your guest system in order to activate the updates and then proceed as described above. openSUSE 1. In order to fully update your guest system, open a terminal and run zypper update as root. 2. Install the make tool and the GNU C compiler using zypper install make gcc 3. Reboot your guest system in order to activate the updates. 4. Find out which kernel you are running using uname -a An example would be 2.6.31.12-0.2-default which refers to the “default” kernel. Then install the correct kernel development package. In the above example this would be zypper install kernel-default-devel 5. Make sure that your running kernel (uname -a) and the kernel packages you have installed (rpm -qa kernel\*) have the exact same version number. Proceed with the installation as described above. 58