A number of you have written me regarding which operating system is best for hacking. I'll start by saying that nearly every professional and expert hacker uses Linux or Unix. Although some hacks can be done with Windows and Mac OS, nearly all of the hacking tools are developed specifically for Linux. There are some exceptions, though, including software like Cain and Abel , Havij, Zenmap , and Metasploit that are developed or ported for Windows. When these Linux apps are developed in Linux and then ported over to Windows, they often lose some of their capabilities. In addition, there are capabilities built into Linux that simply are not available in Windows. That is why hacker tools are in most cases ONLY developed for Linux. To summarize, to be a real expert hacker, you should master a few Linux skills and work from a Linux distribution like BackTrack or Kali. Image via wonderhowto.com For those of you who've never used Linux...