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

Managing software packages

Each distribution has its own package managers. There are two types of package managers for each distribution, one for low-level and one for high-level package management. For an RPM-based distribution such as CentOS or Fedora, the low-level tool is the rpm command, and the high-level tools are the yum and dnf commands. For openSUSE, another major RPM-based distribution, the low-level tool is the same rpm command, and for high-level tools, there is the zypper command. For DEB-based distributions, the low-level command is dpkg and the high-level command is apt (or the now deprecated apt-get).

What is the difference between low-level and high-level package managers in Linux? The low-level package managers are responsible for the backend of any package manipulation, and are capable of unpacking packages, running scripts, and installing apps. The high-end managers are responsible for dependency resolution, installing and downloading packages (and groups of...