Book Image

Mastering Linux Administration

By : Alexandru Calcatinge, Julian Balog
Book Image

Mastering Linux Administration

By: Alexandru Calcatinge, Julian Balog

Overview of this book

Linux plays a significant role in modern data center management and provides great versatility in deploying and managing your workloads on-premises and in the cloud. This book covers the important topics you need to know about for your everyday Linux administration tasks. The book starts by helping you understand the Linux command line and how to work with files, packages, and filesystems. You'll then begin administering network services and hardening security, and learn about cloud computing, containers, and orchestration. Once you've learned how to work with the command line, you'll explore the essential Linux commands for managing users, processes, and daemons and discover how to secure your Linux environment using application security frameworks and firewall managers. As you advance through the chapters, you'll work with containers, hypervisors, virtual machines, Ansible, and Kubernetes. You'll also learn how to deploy Linux to the cloud using AWS and Azure. By the end of this Linux book, you'll be well-versed with Linux and have mastered everyday administrative tasks using workflows spanning from on-premises to the cloud. If you also find yourself adopting DevOps practices in the process, we'll consider our mission accomplished.
Table of Contents (20 chapters)
Section 1: Linux Basic Administration
Section 2: Advanced Linux Server Administration
Section 3: Cloud Administration

Working with Ansible

Starting with this section, we'll use the Ansible CLI tools extensively to perform various configuration management tasks. To showcase our practical examples, we'll work with a custom lab environment, and we highly encourage you to reproduce it for a complete configuration management experience.

Here's the high-level outline of this section:

  • Setting up the lab environment
  • Configuring Ansible
  • Using Ansible ad hoc commands
  • Using Ansible playbooks

Let's start with an overview of the lab environment.

Setting up the lab environment

Our lab uses VMware Fusion as a desktop hypervisor for the virtual environment, but any other hypervisor will do. Chapter 1, Installing Linux, describes the process of creating Linux VMs with VMware Fusion and Oracle VM VirtualBox in detail. We deployed the following virtual machines to mimic a real-world configuration management infrastructure:

  • Neptune: The Ansible control node...