Although organizations may not have a large number of Linux systems, the ones they do have are often among the most critical and require careful protection. This course section provides practical guidance for enhancing the security of any Linux system. It includes how-to instructions for beginners as well as advanced security advice and best practices for administrators at different levels of experience.

Given Linux’s reputation as a free operating system, it is often the platform where many advanced security concepts are first developed. For instance, containers offer powerful and flexible solutions for cloud computing deployments. While containers were not originally designed for information security, their minimalist approach aligns with security methodologies such as defense in depth. The section will explore the security implications of containers and best practices for their management.