I'm not sure how this is rated so high. Most "lessons" are 2 minute, ultra high altitude videos followed by 10-20 minutes of reading. You can get more info from random YT videos. The material is full of typos. There are very few labs and they take < 5 minutes to do because they are so simple.

It was the worst, most superficial and most meaningless education of my life. The entire content can be learned in an hour on the internet. I learned nothing about the Linux operating system itself. Waste of time!