Rating: - Useful book to learn most important unix things, good chapters on awk & sed, but also has some redundant material
This is a review of the 3th edition of Unix in a nutshell. The book has almost 600 pages, roughly divided as follows:
- 200 p. on unix commands: good stuff, to the point, summaries of all commands, with examples.
- 100 p. on shells, (bash, kch, csh: good stuff, summary of commands, examples.
- 5 p. on pattern matching: way too short! Here I miss a good and thorough section on regular expressions !
- 40 p. on various editors (emacs, vi, ex): useful if you use them, I prefer a GUI editor these days.
- 30 p. on awk & sed: good stuff, but this should be expanded. I learned at lot here, but I still want to know more.
- 100 p. on stuff I never use (troff, mm ms me macros (?) ... )
- 50 p. on the make utility and related stuff only programmers use.

Bottom line: the sections on unix commands, csh, awk and sed are really good. The rest is only who those who really need it. And if you have never heard of it, you probably are not in this group. So the 'good half' of this book is nice to have as reference on your desk.

Advice: buy this book used for a few euro's and you cannot go wrong.