This is an excellent lecture! It easily explains parts that are difficult to understand in books or things you might miss, and you can learn through the lecture things that you can only know by actually experiencing them. I highly recommend it to people working in the field as well. Regardless of experience level, you can take another look at Linux systems and find what you've missed. Personally, I think if companies had their employees take the instructor's lectures, it would be tremendously helpful for both the employees and the company.