Today, Linux is used everywhere, which means the demand for Linux administrators is high. This book is organized to help readers develop the essential skills to become competent Linux administrators. This book provides extensive materials that will deliver beginners vast knowledge in the Linux domain. It begins with the fundamentals of Linux systems and moves ahead to discussing advanced topics. To help the readers gain competitive knowledge, RHEL9 is used throughout this book. This book helps the readers learn useful Linux commands to efficiently manage Linux servers. It also delivers extensive knowledge of shell scripting required to automate most of the regular admin-related tasks. Security of the data and the server as a whole is another important aspect that this book describes. Besides, this book also explains advanced topics such as cloud, web servers, performance tuning, etc., in a practical way that will truly be very helpful for beginners to start their professional career in this domain.