We’ve covered a lot of ground here, and the information may take a while to fully sink in. Perform the playground exercise over and over until it makes sense. It is important to get a good understanding of basic file manipulation commands and wildcards. Feel free to expand on the playground exercise by adding more files and directories, using wildcards to specify files for various operations. The concept of links may be a little confusing at first, but take the time to learn how they work. They can be a real lifesaver.