Tip: Configure a shared folder for Ubuntu in VirtualBox

VirtualBox is a very lightweight virtualization software, open-source and free, which is quite excellent. It has all the basic functions, and it's perfectly fine for personal use. Compared to the 600+ MB installation package of VMware Workstation with ACE, the 21.3 MB VirtualBox is much more appealing. Additionally, in February 2008, the company that originally created VirtualBox, innotek, was acquired by Sun Microsystems. With Sun’s support, VirtualBox will surely become better and better. Well, let's not dwell on this too much. Here’s a method to set up shared folders when using VirtualBox to virtualize Linux on Windows.