Guest Additions

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virtualbox

The VirtualBox Guest Additions are designed to be installed inside a virtual machine after the guest operating system has been installed. They consist of device drivers and system applications that optimize the guest operating system for better performance and usability.

Mounting the Guest Additions ISO

OS X host - the additions ISO, VBoxGuestAdditions.iso is located within the VirtualBox application package (probably /Applications/VirtualBox.app/Contents/MacOS/. You can access that from the Finder by right-clicking on the VirtualBox application and selecting Show Package Contents.

In the guest's virtual machine, select "Mount CD/DVD-ROM" from the "Devices" menu in the virtual machine's menu bar and then "CD/DVD-ROM image". This brings up the Virtual Media Manager. On OS X, the easiest way to add the ISO is to drag VBoxGuestAdditions.iso onto the Virtual Media Manager window from the Finder.

CentOS Linux guest
Create mountpoint for the ISO:

mkdir /mnt/cdrom
- Mount the CD/DVD drive to the mountpoint:
  
  mount /dev/cdrom /mnt/cdrom
- or Mount the ISO file:
  
  mount -o loop /extra/VBoxGuestAdditions.iso /mnt/cdrom

Installation

CentOS Linux
Install the dkms package from RPMForge:

cd /extra/src wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el6.rf.i686.rpm rpm -Uvh rpmforge-release-0.5.2-2.el6.rf.i686.rpm yum install dkms

Install the kernel development packages:

yum -y install kernel-devel

Restart the VM

reboot

Once it reboots, mount the Guest Additions ISO and go the VBox Additions directory and run the Linux additions installer:

cd /mnt/cdrom/ sh VBoxLinuxAdditions-x86.run

Reboot the system again:

reboot

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