This module covers the fundamental concepts of operating systems administration and security through a practical approach. Students will explore key components in computing devices such as memory, processor and storage. Basic shell scripting will also be covered in this module. Through hands-on exercises, students learn to perform installations and configurations on Windows and Linux systems such as user management, network administration and service management. Students will also be taught Operating Systems (OS) hardening techniques such as the configuration of host-based firewalls, disabling of unnecessary services and the application of security patches.