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

Linux usage in the modern world

The open source nature of the Linux kernel and its support for multiple hardware architectures made it a very popular choice for custom operating systems, while general-purpose Linux distributions also found wide use in every niche where proprietary Unix systems were used before.

The most popular Linux-based operating system in the world is Android. While most Android applications are written for a custom runtime and never use any functionality of the Linux kernel directly, it’s still a Linux distribution.

Network devices are usually managed through a web GUI or a custom command-line interface, but they still often have Linux under the hood. This applies to consumer-grade Wi-Fi routers, as well as high-performance enterprise and data center routers and switches alike.

General-purpose Linux distributions are also everywhere. Thanks to built-in support for running virtual machines (through Xen or KVM hypervisors), Linux powers the largest cloud computing platforms, including Amazon EC2, Google Cloud Platform, and DigitalOcean. A lot of guest systems are also Linux machines running web servers, database systems, and many other applications.

Linux is also widely used in high-performance computing: all of the most powerful supercomputers in the world are now running Linux on their control and I/O nodes.

Last but not least, the author of this chapter typed these words on a Linux desktop.