Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying The Ultimate Linux Shell Scripting Guide
  • Table Of Contents Toc
  • Feedback & Rating feedback
The Ultimate Linux Shell Scripting Guide

The Ultimate Linux Shell Scripting Guide

By : Donald A. Tevault
4.8 (5)
close
close
The Ultimate Linux Shell Scripting Guide

The Ultimate Linux Shell Scripting Guide

4.8 (5)
By: Donald A. Tevault

Overview of this book

Embark on a comprehensive journey through command shells with this hands-on manual. While Bash is a Linux staple, Z shell and PowerShell are rising stars, applicable to Linux, macOS, and Unix. Progress seamlessly through chapters, each building on the last, creating a solid foundation. Learn through a unique approach: concepts, examples, and interactive labs. These labs, nearly a hundred strong, form the core of experiential learning, essential for script creation. Focusing on Linux commands and their scripting applications, this manual is universally relevant across Linux and select Unix-like systems. It goes beyond theory, offering practical scripts for real-world Linux administration. Scripts are designed for manageability, aiding learning and troubleshooting. The goal is to nurture the ability to craft intelligent, functional shell scripts. While centered on Bash, this book offers a peek into the future with Z Shell and PowerShell, expanding your skills and adaptability. This book is systematically structured and engaging so that it will guide you to master command shells, equipping you for real-world Linux challenges.
Table of Contents (26 chapters)
close
close
24
Other Books You May Enjoy
25
Index

Using Shell Script Debugging Tools and Techniques

There are a few different debugging tools that we can use, which include shellcheck, checkbashisms, and shall. We’ve already looked at them in Chapter 19—Shell Script Portability, so we won’t look at them again here. Instead, I’ll present some tools and techniques that we haven’t covered yet.

Using echo Statements

Sometimes, if you have a problem with a shell script that you can’t figure out, placing echo statements in strategic locations can help you find the problem.

You may see in other references that some people think of echo statements as the poor man’s debugging tool. That’s because echo is always available, and can be used if you can’t use anything else.

Back in Chapter 16, Creating User Interfaces with yad, dialog, and xdialog, I showed you the xdialog-hello2.sh script, which can automatically detect two things.

  • It can detect...

Unlock full access

Continue reading for free

A Packt free trial gives you instant online access to our library of over 7000 practical eBooks and videos, constantly updated with the latest in tech
bookmark search playlist download font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Confirmation

Modal Close icon
claim successful

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY