Unix Programming

In this authoritative work, Linux programming expert Michael Kerrisk provides detailed descriptions of the system calls and library functions that you need in order to master the craft of system programming, and accompanies his explanations with clear, complete example programs.

Introduction: Unix Tricky Interview Questions

Using C on the UNIX System provides a thorough introduction to the UNIX system call libraries. It is aimed at programmers who already know C, but who want to take full advantage of the UNIX programming environment. If you want to learn how to work with the operating system and to write programs that can interact with directories, terminals, and networks at the lowest level, you will find this book essential. It is impossible to write UNIX utilities of any sophistication without understanding the material in this book. Even if you don't want to program at this level, familiarity with the UNIX system interface is the mark of an experienced and fluent user. If you want to know how the C shell performs job control or how network addressing works, you will find the answer here. Your knowledge of the UNIX system is fundamentally incomplete until you can make C work for you.

Bash scripting provides programming for the most popular operating system in the world. Linux is the most popular OS.