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


Here's a brief quiz about some of the essential concepts that were covered in this chapter:

  1. Enumerate at least a couple of ACMs that are used in Linux.
  2. Enumerate the fields of the SELinux security context.
  3. What is a domain in SELinux?
  4. Can you think of a significant difference between SELinux and AppArmor in terms of enforcing security policies?
  5. What is the AppArmor command-line utility for retrieving the current application profiles?
  6. How do we toggle an AppArmor application profile between the enforce and complain modes?
  7. How many chains can you think of in the Linux kernel networking stack?
  8. What is the default firewall management solution in RHEL/CentOS 8? How about Ubuntu?
  9. Can you think of a best practice for designing firewall rules?
  10. If you had to pick a packet filtering framework, which one would you choose? Why?