So here’s a post on five Linux distros that focus on security. They are formidable accomplishments indeed, filled with the usual terms you see bandied about at any Black Hat security conference. And there’s no fear of commitment, since most if not all Linux systems are designed to run from a USB pendrive, DVD, or other portable media. Why not give one a spin every now and then and penetration-test your website? You might learn a thing or two from it.