Oracle VM VirtualBox
VirtualBox is powerful Cross-platform Virtualization Software for x86-based systems.
“Cross-platform” means that it installs on Windows, Linux, Mac OS X and Solaris x86 computers. And “Virtualization Software” means that you can create and run multiple Virtual Machines, running different operating systems, on the same computer at the same time. For example, you can run Windows and Linux on your Mac, run Linux and Solaris on your Windows PC, or run Windows on you Linux systems.
1. To install Oracle VirtualBox 4.1.6 in Ubuntu 11.04/11.10 open a Terminal (ctrl+alt+t, You need to edit /etc/apt/sources.list
sudo gedit /etc/apt/sources.list
2. Add the following line for ubuntu 11.10
deb http://download.virtualbox.org/virtualbox/debian oneiric contrib
3. and for Ubuntu 11.04 user just add the following line
deb http://download.virtualbox.org/virtualbox/debian natty contrib
4. Save and exit the file.
ctrl+o to save and ctrl+x to exit
wget -q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add -
5. Update source list
sudo apt-get update
6. You can now instll Virtualbox
sudo apt-get install virtualbox-4.1
Requirements: Install dkms to ensure that the virtualbox host kernel modules are properly updated, if you upgrade your linux kernel version.
sudo apt-get install dkms