Summary
For many readers, this chapter has been a review. For those ramping up their knowledge to program in C under UNIX, this chapter will have exposed you to some important UNIX concepts. Perhaps you learned a few historical tidbits along the way.
Chapter 3 is another foundation-building chapter. Veterans can skip that chapter if they are in a hurry. If you are still building up your knowledge about UNIX programming, you will want to pay special attention to this chapter. It will help you master the material in the remainder of this book.
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