We've accomplished a lot of security improvement with this article. We're using accounts with limited rights and good passphrases. We've put up good firewall shields. We've learned how to check for security updates as well as how to load them quickly and easily. What else remains?
There are some interesting security tools, such as personal file sharing, an applet that controls (and reveals) what applications load at system startup, a mysterious Passwords and System Keys appletand many others to download and try! Both Linux distributions have backup options, important for systems doing persistent storage of data.
Meanwhile, have you found a good Clam antivirus distribution that's available with Yum? I'm struggling getting my Chrome browser installation working. I'm probably going to need to shell out to a rootshelldefinitely more complex than this article's scope. But this article was written to improve Linux system security quickly and easily. Let's save more advanced topics for a more advanced article. For now, finish your configuration, and post any questions as a reply to this article.