I worked on a bit more of the DevOps Prerequisites Course - Getting started with DevOps.
I covered some commands for user accounts, downloading files with curl and wget, checking the OS version, RPM and Yum, and services.
Using systemctl is definitely new, I never learned that. I would always use service ... start, stop, enable, etc.
I stopped the video at the point where the instructor is introducing the vi editor. I'm interested to see if I will pick up some new tips. I can use vi well enough, (I know how to exit 😀), but I never took the time to learn to use it well. I generally use VS Code or nano.