[ Thanks to Jonny5 for this link.
]
“Security. As we live our lives more and more connected, we all
strive to protect our data, whether it be our mp3s, website, credit
card numbers, or maybe even some top secret government data. The
Linux operating system can be a very secure platform, a lot more
secure than others, but it is by no means perfect, and it is never
very secure right out of the box. If you strive to have a 100%
totally “hack-free” computer, then I suggest you disconnect it’s
power supply and store it in the basement, because nothing can be
perfect. The best we can do to protect ourselves is to learn,
to adapt, and to prepare the defenses for the onslaught that is the
Internet. The object of this guide is to give you a good start, on
your way to securing your Linux system from malicious
attacks.