Nothing about SELinux or AppArmor? While these are enabled by default on some of the big distros I think a basic guide on managing and troubleshooting would be beneficial.
Yeah, the best impact would come from using SELinux, AppArmor, and GRSec. Everything else is just tweaking defaults, which for up-to-date software probably isn't going to impact your security much at all.
I don't disagree but you gotta start with the basics. SELinux can be rather advanced/complex and probably warrants its own guide. I still have to learn it better before I try to write a guide on it.
