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

Group management

Now that we know how to make new user accounts, manage existing user accounts, and switch between user accounts, we need to learn how to manage groups. Linux’s implementation of the concept of groups is not all that dissimilar to that of other operating systems, and it essentially performs the same function. Controlling a user’s access to the resources on your server can be done more effectively with the help of groups. You can grant access to users or deny access to users by simply adding them to or removing them from a group that has been assigned to a resource (such as a file or directory). This is made possible by assigning a group to the resource in question. The way that this is handled in Linux is such that each and every file and directory has both a user and a group that claims ownership of it. When using Linux, ownership is assigned on a one-to-one basis, meaning that each file or directory has just one user and just one group associated with...