Unlike most of the chapters in this book, this one really doesn't say very much about what Perl does or how to use it. perl (the program) is quite easy to use; Perl (the language, for which perl is an interpreter) is also easy to learn, especially if you know some of the other tools that it is designed to replace. However, it is also quite large and complex - sufficiently so that even the quick reference treatment we gave to would be difficult to fit in here.
Throughout the book, you'll find sprinkled a few Perl scripts.
If you are interested in learning more about Perl, try the Nutshell Handbooks Learning Perl and Programming Perl ...or just start in, using the extensive manual page stored with perl itself on the Power Tools disc.