The RHCSA/RHCE stuff is good, I passed the RHCSA a couple years ago and it's a solid set of foundations. There's a good chat (devopschat.slack.com) that's usef

The RHCSA/RHCE stuff is good, I passed the RHCSA a couple years ago and it's a solid set of foundations. There's a good chat (devopschat.slack.com) that's useful for learning stuff like this.