Chapter 1, Running Linux in a Virtual Environment, gives an overview of the IT security landscape, and will inform the reader why learning Linux security would be a good career move. We'll also show how to set up a virtual lab environment for the hands-on labs.
Chapter 2, Securing User Accounts, covers the dangers of always using the root user account, and introduces the benefits of using sudo instead. We'll then cover how to lock down normal user accounts, and ensure that the users use good-quality passwords.
Chapter 3, Securing Your Server with a Firewall – Part 1, involves working with the various types of firewall utilities.
Chapter 4, Securing Your Server with a Firewall – Part 2, involves working with the various ...