There were also quite a number of lower level plumbing commands that we encountered in the book.

The first one we encounter is ls-remote in Ch 4, Distributed Git which we use to look at the raw references on the server.

We use ls-files in Ch 5, Git Toolkit, Ch 5, Git Toolkit and Ch 5, Git Toolkit to take a more raw look at what your staging area looks like.

We also mention rev-parse in Ch 5, Git Toolkit to take just about any string and turn it into an object SHA-1.

However, most of the low level plumbing commands we cover are in Ch 10, Git Internals, which is more or less what the chapter is focused on. We tried to avoid use of them throughout most of the rest of the book.