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The Ultimate Linux Shell Scripting Guide

The Ultimate Linux Shell Scripting Guide

By : Donald A. Tevault
4.8 (5)
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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)
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24
Other Books You May Enjoy
25
Index

Summary

In this chapter, I didn’t introduce a lot of new scripting concepts as I normally do. Instead, I showed you how to use the concepts that you already know to create scripts that might be useful to a security-conscious administrator. You’ve seen how to create shell scripts that can do simple port scans or operating system identification. Then, you saw how to create auditing scripts that can show if the root user account is enabled, when a normal user is logging into the system, and what a normal user is doing with his or her sudo privileges. After that, I showed you a script that can read a list of IP addresses, and automatically create firewall rules to block those addresses. Finally, I showed you some tips about how to find and use scripts that other people have already created.

In the next chapter, we’ll talk a bit about shell script portability. I’ll see you there.

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