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

Links (hard and symbolic)

There are two alternative ways to refer to a file on the hard drive: hard links and symbolic links. The filesystem, which organizes which file belongs where and how, includes several approaches such as symbolic link and hard link. A hard link basically refers to the inode of a file and is a synchronized carbon copy of that file. On the other hand, symbolic links point directly to the file, which in turn points to the inode, a shortcut. We need to next discuss inodes in order to comprehend how symbolic and hard links function.

What is an inode?

A Unix-style filesystem uses a data structure called an inode to describe filesystem objects such as files and directories. The properties and disk block locations of an object’s data are stored in each inode. Attributes of filesystem objects can include metadata, owner information, and permission information.

Inodes are essentially a whole address’s numerical equivalent. The operating system can...