At the heart of any modern computer device sits the operating system and if the device is a smartphone, IoT node, data centre server or supercomputer, then this is very likely to be Linux. This textbook provides a practical introduction to the foundations of modern operating systems, with a focus on GNU/Linux and the Arm platform. It explains operating systems theory and concepts but grounds them in practical use through illustrative examples of their implementation in GNU/Linux, as well as making the connection with the Arm hardware supporting the OS functionality.
