Okay, so here's a quick command review. What have you seen?
Well, grab your ultimate filtering utility, awk, which is a nice utility that
allows you to find files containing text. It's like grab on steroids.
Set is a stream editor. It allows you to edit text in a programmatic way.
TR is for translate. It changes uppercase and lowercase. For instance,
Cut is a simple utility that allows you to filter text.
And Sort is a utility that allows you to sort text in many different ways.