It's so unfriendly. 1. The author has compiled and pasted what he lectured in the past into the curriculum. He went back a long way to the past and then came back to the present. It feels like traveling in a time machine. As a result, there is no consideration at all for explaining the contents that are lacking or updated for the students to understand. 2. The curriculum also seems to have been organized to reuse what he lectured. Rather than an ELK lecture, it feels like a collection of several tutorial exercises related to ELK. There is no explanation. If you look at the Elastic Cluster Configuration section, you just get the docker-compose example file and type in the command and that's it. If it were a cluster section, it would have to explain what a cluster is and how it is configured. You just follow the commands in the guide and that's it. 3. There are a lot of reference links or long commands that you have to follow, but they don't provide a guide that students can copy and paste. So you have to type in the screen contents and follow them one by one. Even then, many of the paths don't exist because the lecture time is too far in the past. You have to find the currently changed pages or setup methods on your own.