How to install and run Ubuntu 9.10 in VirtualBox

If you have a Windows operating system on your desktop and you want to use in parallel Ubuntu 9.10 or other platform you can use virtualization. One of the new incredible features of Ubuntu 9.10 is UbuntuOne, your personal cloud where you can store and share files. I use VirtualBox, a professional virtualization tool, developed by Sun and freely available as Open Source Software.

VirtualBox runs on Windows, Linux, Macintosh and OpenSolaris hosts and supports a large number of guest operating systems including but not limited to Windows (NT 4.0, 2000, XP, Server 2003, Vista, Windows 7), DOS/Windows 3.x, Linux (2.4 and 2.6), Solaris and OpenSolaris, and OpenBSD.

What are the steps?

1. Download the VirtualBox Open Source Software for the Windows platform from here;
2. Run the VirtualBox executable file you just saved on your desktop;
3. Follow the installation steps, if you have less experience with virtualization, keep the settings as default; when installation is finished reboot your PC;
4. Download the Ubuntu 9.10 also freely available as an Open Source operating system;
5. Open your VirtualBox tool and click New to create a new Virtual Machine;
6. Follow the wizard to create a new Virtual Machine, Ubuntu 9.10
7. After creating your virtual Ubuntu, click on Settings → System → Motherboard and set the Boot Order with CD/DVD-ROM as the first boot sequence;
8. Click on Storage → Attributes and add the Ubuntu.iso file on the virtual CD device;  
9. Start the Virtual machine, it will boot from your Virtual CD device and start to install Ubuntu on your virtual partition; I can say it's the easiest and fastest OS installation;
10. After installing Ubuntu, go to the Virtual Machine settings and change the boot order to boot from your virtual hard disk;
11. If you want to use it in a Full-screen Mode , you have to install a few drivers for VirtualBox; go to System → Administration → Synaptic package Manager, search for virtualbox and install the following packages :   
VirtualBox-ose
VirtualBox-ose-source
VirtualBox-ose-guest-sourse
VirtualBox-ose-qt
VirtualBox-ose-guest-x11
VirtualBox-ose-additions
VirtualBox-ose-guest-utils

12. The last step before enjoying your Full screen mode Virtual Ubuntu  is to reboot your virtual machine.
Any comments/questions are welcome!