Book Image

The Linux DevOps Handbook

By : Damian Wojsław, Grzegorz Adamowicz
3.5 (2)
Book Image

The Linux DevOps Handbook

3.5 (2)
By: Damian Wojsław, Grzegorz Adamowicz

Overview of this book

The Linux DevOps Handbook is a comprehensive resource that caters to both novice and experienced professionals, ensuring a strong foundation in Linux. This book will help you understand how Linux serves as a cornerstone of DevOps, offering the flexibility, stability, and scalability essential for modern software development and operations. You’ll begin by covering Linux distributions, intermediate Linux concepts, and shell scripting to get to grips with automating tasks and streamlining workflows. You’ll then progress to mastering essential day-to-day tools for DevOps tasks. As you learn networking in Linux, you’ll be equipped with connection establishment and troubleshooting skills. You’ll also learn how to use Git for collaboration and efficient code management. The book guides you through Docker concepts for optimizing your DevOps workflows and moves on to advanced DevOps practices, such as monitoring, tracing, and distributed logging. You’ll work with Terraform and GitHub to implement continuous integration (CI)/continuous deployment (CD) pipelines and employ Atlantis for automated software delivery. Additionally, you’ll identify common DevOps pitfalls and strategies to avoid them. By the end of this book, you’ll have built a solid foundation in Linux fundamentals, practical tools, and advanced practices, all contributing to your enhanced Linux skills and successful DevOps implementation.
Table of Contents (20 chapters)
1
Part 1: Linux Basics
6
Part 2: Your Day-to-Day DevOps Tools
12
Part 3: DevOps Cloud Toolkit

Understanding Bash built-ins and grammar

Let’s get back to the fundamentals before we start creating a script. First, we will look into the Bash scripting language syntax and its limitations.

Built-in commands are commands that are integral to Bash and are the main scripting syntax we are going to use. Bash will try to execute any other commands from the system it runs on.

Just like any other interpreted language (for example, Python or Ruby), Bash has unique syntax and grammar. Let’s look into it.

Bash, similar to other programming languages, interprets files from top to bottom and from left to right. Each line usually contains one or more commands. You can glue several commands together in one line using a pipe (|) or double pipe character (||), semicolon (;), or double ampersands (&&). It’s useful to remember that double pipes have the same function as logical OR and double ampersands have the same function as logical AND. This way, you can...