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

Secure Shell (SSH) protocol

In the DevOps world, almost nothing runs locally on your laptop or PC. There is one golden standard among ways to reach remote systems and it’s the SSH protocol. SSH was developed in 1995 as a secure, encrypted remote shell access tool that would replace plaintext utilities such as telnet or rsh. The main reason for this is that in distributed networks, it is too easy to eavesdrop on communication and anything that is being transmitted in open text can easily be intercepted. This includes important data such as login details.

The most commonly used SSH server (and the client) in the Linux world is OpenSSH (https://www.openssh.com/). Other open source servers that are still maintained at the time of writing are lsh (http://www.lysator.liu.se/~nisse/lsh/), wolfSSH (https://www.wolfssl.com/products/wolfssh/), and Dropbear (https://matt.ucc.asn.au/dropbear/dropbear.html).

SSH is mainly used to log into a remote machine to execute commands. But it...