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

Automating repetitive tasks

There are times when you’ll want to make some tasks repetitive. You may write a script that will create a backup of a database, check users’ home directory permissions, or dump current operating system preformance metrics into a file. Modern Linux distributions provide you with two ways of setting these up. There is a third method that allows you to run a task once, at a delayed time (the at command), but here, we’re interested in repetitive tasks.

Cron jobs

Cron is a traditional way of running tasks that need to be executed regularly at specified intervals. Usually, they should be obsolete by systemd timers, but a lot of software provides repeatability through the use of cron jobs and Alpine Linux won’t have this in the name of the minimal-sized distribution.

Cron jobs are essentially commands that are run at predefined intervals. The command and their trigger timers are defined in configuration files that live in the...