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


The relatively vast content of this chapter may appear overwhelming. A key takeaway should be the focus on the frameworks (modules). If we're discussing firewalls, we should look at packet filtering frameworks such as iptables, netfilter, and nftables. For access control, we have security modules such as SELinux and AppArmor. We covered some of the pros and cons of each. The pivoting choice, possibly deciding the Linux distro, is between AppArmor and SELinux. One is perhaps swifter than the other, with the related administration effort hanging in the balance. For example, choosing AppArmor would narrow down the major Linux distributions to Ubuntu, Debian, and OpenSUSE. The distro choice, in turn, would further dictate the available firewall management solutions, and so on.

Mastering the application security frameworks and firewall management tools will help you keep your systems safe with minimal effort. As with any typical Linux system administration task, there are...