Learn essential Linux system hardening techniques in this 36-minute video from Derbycon 2012. Explore topics such as disabling unnecessary services, securing SSH, configuring firewalls, and implementing best practices for Ubuntu and CentOS systems. Discover how to change passwords, manage open ports, enable logging, and apply critical patches to enhance your Linux security posture. Gain practical insights into creating virtual hard drives, customizing system settings, and leveraging additional resources for ongoing system protection.