本书详尽地介绍了UNIX系统编程的高级技术。通过本书的学习，读者将能够充分利用标准的UNIX开发工具，掌握UNIX操作系统的内部工作方式，包括文件系统的内部操作以及大量UNIX函数的正确使用方法和技巧。本书详细说明了内部处理技术、进程间控制以及通过信号、分支进程和共享内存进行同步的方法。另外，本书还提供了大量的代码实例，这些实例涉及到多用户同时访问文件的技巧、改变目录结构以及动态更改用户和组参数的方法。

本书适用于UNIX专业程序员。 -The book has introduced PowerOpen programming high level technology at large. Studying by the book , reader standard UNIX develops an implement with being able to fully utilize , have internal UNIX OS mechanics in hand, including that the systematic inside of document handling and large amount of UNIX function rightness using method and artifice. The book has explained that the inside handles a technology , the course room controls and memory carries out synchro method by the signal , branch course and share detailedly. Another , the book have provided the magnanimous code example , these examples have dealt with multi-user simultaneous visit document artifice , Change Directory structure has formed parametric method as well as development changes the consumer sum. The book applies to the UNIX special field programmer.