Thanks for the comment. No plans for a course yet, but our product can teach you a lot about Linux forensics by just what it does. We have a free license for home lab users that may be of interest.
eh, I wrote a stealth malware called gorgon, absolutely no impact on the system, no slowing down, no bugging the system, nothing, mainly due to some design elements I came up with, it's also compatible with pretty much every kernel version since 2.something point is, if someone is skilled enough, and puts the time and effort into a rootkit, they can design something truly invisible