Palonek's Software Guide To Keeping You Safe.

Here are the top tools for scanning and securing your computer.  

 

CHKROOTKIT   Scans your computer, please install lsof before you install this one.

LSOF  This is truly a must, displays porgrams running and other information regarding locked objects

ROOTKITHUNTER Open Source Project, truly a good tool.

In addition there are many more tools like ClamAV which is a pretty decent virus scanner. 

Tools themselves will not do a good job if the person behind the tools does not know how to use them. This is why this website exists to help users to learn how to use these tools quickly and effciently. The other way is you could go and read through many pages of documentation which is not a bad idea anyhow. But whos got the time?

Security is only as good as the person who controls and maintains the perimeter.