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

Package managers

A package manager is a program that is responsible for the installation, upgrade, and removal of software packages. In the older approach where software developers are responsible for the installation procedure, they are free to choose whether to distribute their software as an executable that unpacks and installs files or as an archive that the user must unpack manually, and the choice of archive and compression algorithms is also on the developers.

By contrast, package managers usually use a very precise definition of a software package. To make a software project installable with a package manager, its maintainer must create a package file that follows a set of guidelines for its internal structure. Apart from the files needed for a software product to work, package files also contain metadata in a specific format. Metadata files contain information about the package, such as its name, version, license, and lists of other packages that it depends on.