Book Image

Learning AWK Programming

By : Kalkhanda
5 (1)
Book Image

Learning AWK Programming

5 (1)
By: Kalkhanda

Overview of this book

AWK is one of the most primitive and powerful utilities which exists in all Unix and Unix-like distributions. It is used as a command-line utility when performing a basic text-processing operation, and as programming language when dealing with complex text-processing and mining tasks. With this book, you will have the required expertise to practice advanced AWK programming in real-life examples. The book starts off with an introduction to AWK essentials. You will then be introduced to regular expressions, AWK variables and constants, arrays and AWK functions and more. The book then delves deeper into more complex tasks, such as printing formatted output in AWK, control flow statements, GNU's implementation of AWK covering the advanced features of GNU AWK, such as network communication, debugging, and inter-process communication in the GAWK programming language which is not easily possible with AWK. By the end of this book, the reader will have worked on the practical implementation of text processing and pattern matching using AWK to perform routine tasks.
Table of Contents (11 chapters)

Summary

In this chapter, we learned about the features which are available in GAWK but not in AWK. We began with features such as handling non-decimal input, two-way inter-process communication, sorting of arrays, network programming and the GAWK built-in command line debugger. Finally, we learned about profiling using GAWK, for optimizing GAWK programs.

In our next chapter, we will cover some use case examples of text-processing using AWK for system administrators and programmers.