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You're reading from Learning Linux Shell Scripting Leverage the power of shell scripts to solve real-world problems

Product type Paperback

Published in May 2018

Publisher Packt

ISBN-13 9781788993197

Length 332 pages

Edition 2nd Edition

Languages

Perl

Tools

Bash

Concepts

Shell Scripting

Author (1):

Ganesh Sanjiv Naik

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Table of Contents (23) Chapters

Title Page

Dedication

Packt Upsell

Contributors

Preface

1. Getting Started and Working with Shell Scripting FREE CHAPTER

2. Drilling Deep into Process Management, Job Control, and Automation

3. Using Text Processing and Filters in Your Scripts

4. Working with Commands

5. Exploring Expressions and Variables

6. Neat Tricks with Shell Scripting

7. Performing Arithmetic Operations in Shell Scripts

8. Automating Decision-Making in Scripts

9. Automating Repetitive Tasks

10. Working with Functions

11. Using Advanced Functionality in Scripts

12. System Startup and Customizing a Linux System

13. Pattern Matching and Regular Expressions with sed and awk

14. Taking Backup and Embedding Other Languages in Shell Scripts

15. Database Administration Using Shell Scripts

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Index

User initialization scripts

So far, we have seen different scripts that initialize the operating system prior to a user login. Once the basic operating system is initialized, the user login process starts. This process is explained in the following topics.

System-wide setting scripts

In the /etc/ folder, the following files are related to the user level initialization:

/etc/profile: A few distributions will have an additional folder called /etc/profile.d/. All the scripts from the profile.d folder will be executed.
/etc/bash.bashrc.

The preceding scripts are called by every user, including root and normal users. Initially, the /etc/profile script will be called. This script initializes system-wide environment settings. A few distributions will have the /etc/profile.d/ folder. SUSE Linux has an additional /etc/profile.local script. The scripts in this folder will also be called. Then, the /etc/bash.bashrc script will be executed.