I did a big oopsie on this, so it’s a little…. unconventional. We talk about keeping configuration files in git (both /etc and your user’s dotfiles/dotdirs) and about designing “static systems” (live CDs, PXE/iPXE boot filesystems, etc.)
We cover several “mini-topics”; Paden talks about his IBM Tech U experience, he talks about switching distros from CentOS to Arch Linux on his laptop, and we talk about firewalld (and get a LOT of facts wrong; see the Errata).