Day 3 Install Guest Addition

4) Use this link (http://www.virtualbox.org/manual/ch04.html#idp5801200)

 

 Red Hat Enterprise Linux and Oracle Enterprise Linux

1. For versions prior to 6, add divider=10 to the kernel boot options in /etc/grub.conf to reduce the idle CPU load.
2. In order to fully update your guest system, open a terminal and run
   

   yum update

   as root.
3. Install the GNU C compiler and the kernel development packages using
   

   yum install gcc

   followed by
   

   yum install kernel-devel
   

4. Reboot your guest system in order to activate the updates and then proceed as described above.
5. In case Oracle Enterprise Linux does not find the required packages, you either have to install them from a different source (e.g. DVD) or use Oracle's public Yum server located at http://public-yum.oracle.com.