Actually I think it would be good to have more of an intro to the concept of "working directory"

so maybe something like this somewhere around here:

In UNIX shells, there is the concept of the "current working directory", this is basically an analog to the "You Are Here" star on the map of your system's filesystem. The shell will work on files and folders relative to your current working directory location. That is why the "whereami" equivalent is the three letter abbreviation for "Print Working Directory". We will see in a minute how to move around the filesystem, which will update what our current working directory is.