VirtualBox is an opensource virtualization software from Sun microsystems , which allows simultaneous working of more than 1 operation system . Compared to other virtualization solutions like vmware virtualbox is a free software and available for no cost . Virtualbox offers networking and almost all functionalities vmware offers . Compared to vmware , virtualbox is a lighter software . Here is a video tutorial which introduces virtualbox and its functionalities . Virtualbox can be used to run windows in linux or linux in windows and much more .
