You need to solve a diffi cult problem using fi lters and a pipeline. What four steps should you follow? What are the three most important skills you need? Why is cat the simplest possible fi lter? In...

You need to solve a diffi cult problem using fi lters and a pipeline. What four steps should you follow? What are the three most important skills you need?

Why is cat the simplest possible fi lter? In spite of its simplicity, cat can be used for a variety of purposes. Name four.