Thanks for putting this together. I enjoyed reading it and I'm sure it will be useful as a reference.

Like other posts, I would like to see other networking tools listed with a summary of their capabilities, syntax, and configuration files, just like this document. One of the difficult things about using Linux is that you don't always know what various installed applications do. At least if I see that nmap, for instance, is a network accessibility tool useful for hardening Linux network services then I don't have to wonder what it is when I see it listed as an executable in my system directories. If the same document listed nessus as a GUI front end for nmap then I'd know that I should probably download nessus when I want to learn about nmap.

So the style and content of this article are very good. I hope that you will carry this style into developing more documents.