VirtualBox 4.0.12 released and ubuntu 11.04/10.10 installation instructions included

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Oracle VM VirtualBox, formerly Sun xVM VirtualBox and innotek VirtualBox, is a family of x86 virtualization products for enterprise and home use.VirtualBox is a general-purpose full virtualizer for x86 hardware, targeted at server, desktop and embedded use.

What is new in virtualbox 4.0.12

This is a maintenance release. The following items were fixed and/or added:

Mac OS X hosts: Lion fixes
Solaris hosts: fixed preemption issue with Solaris 11 hosts (builds 166 and above)
VBoxManage: more convenient configuration of storage controller attachments by automatically determining the port or device parameter when a storage controller has only one port or device per port (bug #9188)
Storage: fixed possible data corruption under certain circumstances whith VHD and Parallels images (bug #9150)
Storage: fixed access to CD/DVD images beyond 4GB when using the SATA controller (bug #8592)
Floppy: make it possible to unmount a host floppy disk (bug #6651)
Networking: fixed the problem with segmentation offloading when several VMs were transmitting at once
3D support: fixed GL_VERSION string for different locales (bug #8916)
Sources: fixed USB 2.0 support using extension packs for non-official builds
Solaris Additions: fixed automounting of shared folders (bug #8014)

Install virtualbox 4.0.12 on ubuntu 11.04

You need to edit /etc/apt/sources.list

gksudo gedit /etc/apt/sources.list

Add the following line

deb http://download.virtualbox.org/virtualbox/debian natty contrib

For ubuntu 10.10 users add the following line

deb http://download.virtualbox.org/virtualbox/debian maverick contrib non-free

Save and exit the file

wget -q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add --

Update source list

sudo apt-get update

Install virtualbox

sudo apt-get install virtualbox-4.0

Note: Ubuntu/Debian users might want to install the dkms package to ensure that the VirtualBox host kernel modules (vboxdrv, vboxnetflt and vboxnetadp) are properly updated if the linux kernel version changes during the next apt-get upgrade. For Debian it is available in Lenny backports and in the normal repository for Squeeze and later. The dkms package can be installed through the Synaptic Package manager or through the following command:

sudo apt-get install dkms

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