Book Image

Linux for System Administrators

By : Viorel Rudareanu, Daniil Baturin
Book Image

Linux for System Administrators

By: Viorel Rudareanu, Daniil Baturin

Overview of this book

Linux system administration is an essential aspect of maintaining and managing Linux servers within an organization. The role of a Linux system administrator is pivotal in ensuring the smooth functioning and security of these servers, making it a critical job function for any company that relies on Linux infrastructure. This book is a comprehensive guide designed to help you build a solid foundation in Linux system administration. It takes you from the fundamentals of Linux to more advanced topics, encompassing key areas such as Linux system installation, managing user accounts and filesystems, networking fundamentals, and Linux security techniques. Additionally, the book delves into the automation of applications and infrastructure using Chef, enabling you to streamline and optimize your operations. For both newcomers getting started with Linux and professionals looking to enhance their skills, this book is an invaluable hands-on guide with a structured approach and concise explanations that make it an effective resource for quickly acquiring and reinforcing Linux system administration skills. With the help of this Linux book, you’ll be able to navigate the world of Linux administration confidently to meet the demands of your role.
Table of Contents (21 chapters)
1
Part 1: Linux Basics
7
Part 2: Configuring and Modifying Linux Systems
13
Part 3: Linux as a Part of a Larger System

Summary

In this chapter, we learned about the concepts of high availability: redundancy, failover, and load balancing. We also learned how to configure link-layer redundancy by creating bonding interfaces, as well as how to set up redundant routes at the network layer. To ensure transport layer redundancy, we learned how to configure the LVS subsystem by hand with ipvsadm or using Keepalived and also learned how to provide failover for load-balancing nodes using VRRP. Finally, we took a brief look at HAProxy as an application layer load-balancing solution for web servers.

In the next chapter, we will learn about managing Linux systems with configuration automation tools.