(This post refers to Exercises 6 and 7. I was asked to put the code in and watch the effect in Exercise 6. In Exercise 7, the code was explained in the Learn section. Unfortunately, I did not fully understand the explanation and was wondering if anyone could explain it more fully.)
I understand the idea of the m* referring to any file that starts with m, but I looked at the directories for these exercises (https://s3.amazonaws.com/codecademy-content/courses/learn-the-command-line/img/LCL-fileTrees-02.png) and could not find the new files that were added. This form of manipulation deals with copying, not creating, so I am unsure where the new files came from.