The first in a new series exploring the basics of Raspberry Pi Operating System administration, this volume is a compendium of easy-to-use and essential Raspberry Pi OS system administration for the novice user. The overriding idea behind system administration of a modern, 21st century Linux system such as the Raspberry Pi OS is the use of systemd to ensure that the Linux kernel works efficiently and effectively to provide these three foundation stones of computer operation and management: computer system concurrency, virtualization, and secure persistence. Exercises are included throughout to reinforce the readers' learning goals with solutions and example code provided on the accompanying GitHub site. This book is aimed at students and practitioners looking to maximise their use of the Raspberry Pi OS. With plenty of practical examples, projects and exercises, this volume can also be adopted in a more formal learning environment to supplement and extend the basic knowledge of a Linux operating system.