2. In the process of learning linux, it is important to learn to think independently, know how to think and instill basic knowledge, but it also takes a lot of time to think and digest. Don't underestimate the importance of theoretical knowledge. At the same time, try to type codes and commands and be an independent thinker.
3. In the process of learning, it is very important to take notes and study the homework as a whole. Don't think that you may have learned it. You don't need to take notes if you remember a lot of things. Especially those commands that often make mistakes, we must sort them out so as to avoid making mistakes in the future. It's not that I was wrong before, but I'll be fine if I change it now. Remember that this is impossible. Only by writing down my own problems can you really avoid mistakes.