Rating: 

Every example in chapter 5 is well described with elaborate paragraphs of text. The only commands which are not explained are ones which are to appear in subsequent chapters, and in which case it is mentioned so.

This is an excellent book, especially if you already have some experience in scripting and unix, this book teaches you all the good options with commands, which you don't come across otherwise in day to day operation.

It also guides you on how to write scripts the right way, so that they remain portable across systems, and should work 99% of the times.