Unix Shell Programming is a thoroughly updated revision of the classic book on shell programming. Following the methodology of the original text, Unix Shell Programming, Third Edition focuses on the POSIX standard shell, and teaches you how to develop programs in this useful programming environment, taking full advantage of the underlying power of the Unix operating system.
After a quick review of Unix utilities, the books authors take you step-by-step through the process of building shell scripts, debugging them, and understanding how they work within the shell's environment. All major features of the shell are covered, and the large number of practical examples make it easy for you to build shell scripts for your particular applications. The book also describes the major features of the Korn and Bash shells, two of the most popular Unix shells in use today.