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)
Part 1: Linux Basics
Part 2: Configuring and Modifying Linux Systems
Part 3: Linux as a Part of a Larger System

Types of redundancy and load balancing

Before we delve into specific high-availability features and their configuration, let’s discuss possible types of redundancy and load balancing, their advantages, and their limitations.

First of all, we need to remember that the modern TCP/IP networking stack is layered. Multiple layering models include different numbers of layers but the idea is the same: protocols at the upper layer are unaware of the protocols at any lower levels and vice versa. The most commonly used models are the seven-layer Open Systems Interconnection (OSI) model and the four-level DoD model (developed by the United States Department of Defense). We have summarized them in the following table:

OSI model

DoD model





Transmission of electrical...