I liked this, long but written well. May poke around the website too. If you want to secure your Linux Machine properly, you need some quality Linux Security Tools.Read this article and choose the best tool you need.
Top 10 Security Tools for Your Smartphone: "So what can you do to minimize the effects of a stolen smartphone? You can start by installing some form of security for your device. With all of the mobile apps readily available for use (and many for free), there’s really no excuse for not giving your phone ample protection." / Apr 3 '12