Ask HN: Anyone interested in DevOps?

I’m trying to validate an idea I have about learning resources for DevOps, and I wanted to ask HN their thoughts on the topic. DevOps is pretty broad and there are different opinions as to whether it’s a buzzword, a concept, or a set of tools/skills and what exactly is included. Knupp’s blogpost on “Devops is killing the Developer” made a lot of waves here about a week ago.

If you are learning or have had to learn DevOps, what topics did you focus on and why? What concepts have you found the most difficult or challenging, and is there any additional learning material you think would make it easier to learn quickly?