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Mastering Linux Shell Scripting

You're reading from Mastering Linux Shell Scripting A practical guide to Linux command-line, Bash scripting, and Shell programming

Product type Paperback

Published in Apr 2018

Publisher

ISBN-13 9781788990554

Length 284 pages

Edition 2nd Edition

Languages

Bash

Tools

Bash

Concepts

Shell Scripting

Authors (2):

Mokhtar Ebrahim

Andrew Mallett

View More author details

Table of Contents (21) Chapters

Title Page

Packt Upsell

Contributors

Preface

1. The What and Why of Scripting with Bash FREE CHAPTER

2. Creating Interactive Scripts

3. Conditions Attached

4. Creating Code Snippets

5. Alternative Syntax

6. Iterating with Loops

7. Creating Building Blocks with Functions

8. Introducing the Stream Editor

9. Automating Apache Virtual Hosts

10. AWK Fundamentals

11. Regular Expressions

12. Summarizing Logs with AWK

13. A Better lastlog with AWK

14. Using Python as a Bash Scripting Alternative

1. Assessments

2. Other Books You May Enjoy

Leave a review - let other readers know what you think

Index

Chapter 13

Use the lastlog command

$ lastlog | awk ' /Never logged/ { print $1}'

Use the wc command

$ lastlog | awk ' /Never logged/ { print $1}' | wc -l

Zero. Because the line ends with two asterisks.

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Authors (2)

Mokhtar Ebrahim

Mokhtar Ebrahim

Mokhtar Ebrahim started working as a Linux system administrator in 2010. He is responsible for maintaining, securing, and troubleshooting Linux servers for multiple clients around the world. He loves writing shell and Python scripts to automate his work. He writes technical articles on the Like Geeks website about Linux, Python, web development, and server administration. He is a father to a beautiful girl and a husband to a faithful wife.

See other products by Mokhtar Ebrahim

Andrew Mallett

Andrew Mallett

Andrew Mallett has been working professionally with Linux since 1999; much of that time as an Instructor. He now runs his consultancy where he works with and writes about Linux. He is onto his 5th book with Packt and has 65,000 subscribers on his YouTube channel: theurbanpenguin. You can be assured that he masters Linux and is passionate to share his knowledge with you.

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