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

Understanding network security

Network security represents the processes, actions, and policies to prevent, monitor, and protect unauthorized access into computer networks. Network security paradigms span a vast array of technologies, tools, and practices. Here are a few important ones:

  • Access control—Selectively restricting access based on user authentication and authorization mechanisms. Examples of access control include users, groups, and permissions. Some of the related concepts have been covered in Chapter 4, Managing Users and Groups.
  • Application security—Securing and protecting server and end-user applications (email, web, and mobile apps). Examples of application security include Security-Enhanced Linux (SELinux), strongly encrypted connections, antivirus, and anti-malware programs. We'll cover SELinux in Chapter 9, Securing Linux.
  • Endpoint security—Securing and protecting servers and end-user devices (smartphones, laptops, and desktop...