Using the UNIX tools

So back to the practicalities of the UNIX tools... This chapter is interactive. To follow this chapter, make sure you have the text files exatext1, exatext2 and exatext3, and code files wc.awk and wc.perl in a directory where you have write permission. If you don't have these files, you can take another plain text file and call it exatext1. You will be told the contents of the other files in the course of this chapter, so you can create them yourself.

Note for Edinburgh readers:
UNIX commands work differently between different UNIX operating systems. You may on occasion need to execute a few commands to set things up. These Edinburgh local things will be highlighted like this comment here.