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Linux Shell Scripting Bootcamp

You're reading from Linux Shell Scripting Bootcamp The fastest way to learn Linux shell scripting

Product type Paperback

Published in Jul 2017

Publisher Packt

ISBN-13 9781787281103

Length 208 pages

Edition 1st Edition

Tools

Linux

Concepts

Shell Scripting

Author (1):

James K Lewis

View More author details

Table of Contents (12) Chapters

Preface

1. Getting Started with Shell Scripting FREE CHAPTER

2. Working with Variables

3. Using Loops and the sleep Command

4. Creating and Calling Subroutines

5. Creating Interactive Scripts

6. Automating Tasks with Scripts

7. Working with Files

8. Working with wget and curl

9. Debugging Scripts

10. Scripting Best Practices

Index

Chapter 4. Creating and Calling Subroutines

This chapter shows how to create and call subroutines in a script.

The topics covered in this chapter are as follows:

Show some simple subroutines.
Show more advanced routines.
Mention return codes again and how they work in scripts.

In the previous chapters we have seen mostly simple scripts that were not very complicated. Scripts can actually do a whole lot more which we are about to see.

First, let's start with a selection of simple but powerful scripts. These are mainly shown to give the reader an idea of just what can be done quickly with a script.

The rest of the chapter is locked

Visually different images

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83

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Programming languages

73

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Authors (1)

James K Lewis

James K Lewis

James Kent Lewis has been in the computer industry for over 35 years. He started out writing BASIC programs in high school and used punch cards in college for his Pascal, Fortran, COBOL, and assembly language classes. He himself learned the C programming language by writing various utilities, including a fully-functional text editor, which he uses everyday. He started out using DOS and AIX, and then OS/2. Linux is now his operating system of choice. Jim has worked in the past for several companies, including IBM, Texas Instruments, Tandem, Raytheon, Hewlett-Packard, and others. Most of these positions dealt with low-level device drivers and operating system internals. In his spare time he likes to create video games in Java.He has written articles for IBM Developer Works and has one patent.

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