Hardening the Linux desktop

Hardening the Linux desktop: "After completing this tutorial, you will be able to harden your GNU/Linux desktop and prevent attacks against your computer and its data. You will be able to install and configure software to help protect your desktop against malware that can give an attacker access to your computer. You will also be able to use a firewall to protect against inbound and outbound traffic, back up and restore your data, and apply other tricks that further harden your system."