Book excerpt: "The third in a new series exploring the basics of Raspberry Pi Operating System administration, this instalment builds on the insights provided in Volumes 1 and 2 to provide a compendium of easy-to-use and essential Raspberry Pi OS system administration for the novice user, with specific focus on Text Editors, git/GitHub and LXC/LXD 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. This third volume includes a beginner's compendium of essential text-based Linux commands, a complete tutorial on the most important Raspberry Pi OS Text Editors, a description of uses of the git command and a thorough explication of container virtualization with LXC/LXD and Docker. 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"--