This book is one of those Unix books that not only starts from the basics and forwards towards complex parts Unix OS, it also lays a solid theoretical foundation for many of those features. Unix, though being very advanced, were not standardised in a uniform way. There are lot of system calls with varying parameter passing conventions and behaviour. This books accepts these inconsistencies and shows how to cope with that. Rather than targeting a single Unix like OS (such as Linux), the book d...

If you ever wondered how commands like ls, cd work in shell, then you are going the very book which will enable you yo write those programs. Its my basic book in Unix Programming. This book discusses various system calls of available in Unix system and how to use them. However on the downside you should have basic or intermediate C Skills. Introductory chapters may be bit overwhelming with information but latter chapters clear all the air.
My BTech Course book for Unix Lab, so I would recomme...

Programming on linux............OOPS............very tough
Having "Advanced Programming in the UNIX Environment".............concepts become so clear and so exciting.............Now I say WOW...........I am a UNIX programmer............

This Books not only Teaches Programming also helps to lean UNIX Arch , and gives in deepth knowledge in POSIX,

This is an excellent book to start learning programming in UNIX environment. Having a basic knowledge of C is necessary to start with. i used this book while i was in college and still now i have this book and i turn the pages when i need to look up for some function and their usage.
The best book to understand UNIX and programming in UNIX