说明：  本书是第四版，自93 年以来，有超过50 万的读者喜欢它。至少，我们希望他们喜欢它。不管怎样，我们写此书时非常开心。 ◆本书第一版由Randal L.Schwartz 著，第二版由Randal，Tom Christiansen 著，第三版由Randal，Tom Phoenix 著,本版由Randal, Tom Ponenix,和brian foy 著。因此，在本版中，当说“我们”时，指的是最后三位。现在，你可能猜想，为什么在第一页就说写本书我们非常开心（过去时态），理由很简单：因为我们是从后往前写的。这听起来很奇怪。但是，坦白讲，当写完索引后，剩下的就变的很容易。
(This book is the fourth edition, since 93 years, more than 50 million readers like it. At least, we hope they like it. Anyway, we are very happy while writing this book. ◆ Randal L. Schwartz from the book, the first edition, second edition by Randal, Tom Christiansen with, Third Edition by the Randal, Tom Phoenix forward, this edition by the Randal, Tom Ponenix, and brian foy forward. Thus, in this edition, when say " we" when referring to the last three. Now, you might guess, why write a book on the first page said, we are very happy (past tense), the reason is simple: because we are writing back to front. This sounds very strange. But, frankly speaking, when the index finished, the rest becomes very easy.)