Exercise 1.1 - functions in the os/exec package.
Exercise 2.2 - the -verb option. If the verb specifies is anything other than these values, the program should exit with a non-zero exit code and ..
Chapter 6, Page: 11:
" In the book I write that the innermost middleware is executed first when processing a request. Unfortunately, it isn't accurate. The request flows from the outermost middleware to the innermost middleware in it's journey from the user to the application. On it's way back, it's the reverse journey - which is what I am describing in the book. Since we want to add our request ID before we log or handle panic, we add the new middleware as the first middleware."