I feel as if I'd qualify as a power user, who has used Windows since the 3.1 days, who has used MacOS since the Tiger days, and who has been using various Linux distributions since 1999 -- I definitely wasn't the intended target audience of this article.
With a title of "Linux Guide for Power Users," I was hoping for some interesting scripts or relatively unknown applications that might be fun to tinker with. I always love to learn something new that I didn't know before (an example: recently I discovered TimeShift which is really a fancy wrapper around rsync and BTRFS, but it's a pretty nice GUI to help create and restore snapshots that I wasn't aware of before).