If you're a software developer who has ever felt frustrated because you're missing the skills to work fluidly and efficiently on the command line, this book is for you Developers are always working with the operating system, yet most of them are incredibly uncomfortable with the Linux command line. This book is the bridge that will take you to the next level in your software development career. Most of the skills in the book can be immediately practiced on your Mac OS, Linux, or Windows machine. It's written specifically for software engineers, not Linux system administrators, so each chapter will equip you with just enough theory to understand what you're doing before diving into practical commands that you can use in your day-to-day work as a software developer. As you work through the book, you will quickly get comfortable with the basics of moving around on the command line. Once you've got the core skills, you'll see how to apply them in different contexts that you'll come across as a software building and working with Docker images, spinning up applications on cloud instances, and troubleshooting issues in production environments. By the end of the book, you'll be able to use Linux and the command line comfortably, and apply your newfound skills in your day-to-day work to save time, troubleshoot issues, and be the resident command-line wizard on your team. This book is for software developers who want to understand Command-Line (CLI) and who want to quickly fill the gap to advance their skills and their career. Basic knowledge of editing text, working with files and folders, having some idea of what "operating systems" are, installing software, and using a development environment is assumed. (N.B. Additional chapters to be confirmed upon publication)