Out of the box, a Linux desktop is far more secure than most others.
However, this level of security is not necessarily attained through typical security-focused software or techniques. Sometimes, the easiest means to security are those that are the easiest to forget.
You might find these suggestions to be pure common sense, but maybe you'll see a means of security you never thought of before. If you're a new Linux user, these tips are a great place to start to ensure that your Linux experience is a good one.
http://www.linuxlinks.com/portal/news/article.php?story=2008070214155917