I've been doing a lot of interviewing for DevOps, Site Reliability Engineering (SRE), and Cloud Infrastructure jobs, and I think these three concepts are critically underappreciated. 1. Infrastructure As Code 2. Immutable Infrastructure (see my arch server video for examples in the comments) 3. Datacenter-as-a-Computer / Distributed Systems Scheduling DigitalOcean referral link: https://m.do.co/c/0380a1db56a6 My step-by-step project-based Linux course for beginners: https://www.udemy.com/course/hands-on-linux-self-hosted-wordpress-for-linux-beginners/?referralCode=19C0A7DEE2FD53C9C09D Free Linux Sysadmin Course Playlist:    • The Linux Basics Course: Beginner to ...   Patreon: https://www.patreon.com/tutorialinux Official Site & e-mail list: https://tutorialinux.com/ Twitter: https://twitter.com/tutorialinux Facebook: https://www.facebook.com/tutorialinux Podcast: http://kernelpanicpodcast.com/