BackBox Linux 4.4 is a great Linux distro for IT and other techies who want to do their own penetration tests and security assessments. The latest version, released this month, is an Ubuntu 14.04.3-based distribution that is speedy and simple to use. It is a fully functional Linux distro that comes well stocked with standard software. It runs a desktop environment based on the Xfce window manager, which makes it standard and uncomplicated to use.