This kernel requires the following features not present on the cpu: 0:6
Unable to boot – please use a kernel appropriate for your CPU

Screenshot or it didn’t happen?

How to solve:

This can be easily resolved by enabling the PAE/NX option in the virtual machine’s settings.
This will expose the PAE of your CPU to the virtual machine.

Just:

1. go to the homescreen of Virtualbox
2. select your virtual machine
3. click the ‘settings’ button on top of the screen
4. click the tab ‘Advanced’
5. check the box next to ‘PAE/NX’

Like in this screenshot:

Now, you can fire up your virtual machine again, and it will start up without this error.

There are lots of different ways to do this on Ubuntu.
You might want to use VMware, Xen, KVM, Iguest, rhyp, UML, qemu, OpenVZ, … catch my drift? Before making a rash decision, you should consider each of them carefully.
Then start by asking yourself the question “What do I need?”.
This is the single most important question when you want to install some software, as lots of them have cool features, you only use the first week.

I had quite some people suggesting VMware server, as it is free and gets the job done like it should plus it has cool features.
But nevertheless I chose Sun’s VirtualBox because:

• it’s free
• it’s Foss
• it’s in the repository’s
• it shows the world that a big company can easily produce Foss and gain on it.
• it does whatever I need it to do.

To install VirtaulBox fire up a terminal and hit:

sudo apt-get install virtualbox

This will give you some output that might look like this (will differ depending the packages already on your system):

Reading package lists… Done
Building dependency tree
Reading state information… Done
Note, selecting virtualbox-ose instead of virtualbox
The following extra packages will be installed:
libaudio2 libqt4-dbus libqt4-designer libqt4-network libqt4-qt3support libqt4-script libqt4-sql libqt4-sql-mysql libqt4-xml libqtcore4 libqtgui4 qt4-qtconfig virtualbox-ose virtualbox-ose-source
Suggested packages:
nas libqt4-dev bridge-utils
The following NEW packages will be installed:
libaudio2 libqt4-dbus libqt4-designer libqt4-network libqt4-qt3support libqt4-script libqt4-sql libqt4-sql-mysql libqt4-xml libqtcore4 libqtgui4 qt4-qtconfig virtualbox-ose virtualbox-ose-source
0 upgraded, 14 newly installed, 0 to remove and 0 not upgraded.
Need to get 9413kB/18.7MB of archives.
After this operation, 68.0MB of additional disk space will be used.
Do you want to continue [Y/n]?

Answer the question with “Y” and apt wil work it’s magic!
Note that the last lines in your terminal will look like:

Adding modules to DKMS build system
Doing initial module builds
Installing initial modules
Done.
* Stopping VirtualBox kernel module…                                 [ OK ]
* Starting VirtualBox kernel module…                                  [ OK ]

Processing triggers for libc6 …
ldconfig deferred processing now taking place

There is no real need to restart you computer or start the service, as it is done for you.
So now you’ve mastered installing a visualization app. in no-time