Book Image

Mastering Linux Administration

By : Alexandru Calcatinge, Julian Balog
Book Image

Mastering Linux Administration

By: Alexandru Calcatinge, Julian Balog

Overview of this book

Linux plays a significant role in modern data center management and provides great versatility in deploying and managing your workloads on-premises and in the cloud. This book covers the important topics you need to know about for your everyday Linux administration tasks. The book starts by helping you understand the Linux command line and how to work with files, packages, and filesystems. You'll then begin administering network services and hardening security, and learn about cloud computing, containers, and orchestration. Once you've learned how to work with the command line, you'll explore the essential Linux commands for managing users, processes, and daemons and discover how to secure your Linux environment using application security frameworks and firewall managers. As you advance through the chapters, you'll work with containers, hypervisors, virtual machines, Ansible, and Kubernetes. You'll also learn how to deploy Linux to the cloud using AWS and Azure. By the end of this Linux book, you'll be well-versed with Linux and have mastered everyday administrative tasks using workflows spanning from on-premises to the cloud. If you also find yourself adopting DevOps practices in the process, we'll consider our mission accomplished.
Table of Contents (20 chapters)
Section 1: Linux Basic Administration
Section 2: Advanced Linux Server Administration
Section 3: Cloud Administration

Linux software package types

As you've already learned by now, a Linux distribution comes packed with a Kernel and applications on top of it. Although plenty of applications are already installed by default, there will certainly be occasions when you will need to install some new ones or to remove ones that you don't need.

In Linux, applications come bundled into repositories. A repository is a centrally managed location that consists of software packages maintained by developers. Those packages could contain individual applications or operating system-related files. Each Linux distribution comes with several official repositories, but on top of those, you can add some new ones. The way to add them is specific to each distribution, and we will get into more details soon.

Linux has several types of packages, but as we are only covering Ubuntu and CentOS, we will mostly refer to the ones those two distributions use. Ubuntu uses deb packages, as it is based on Debian,...