This Linux Security Cookbook provides over 150 scripts and configuration files to help secure Linux systems. It includes solutions for tasks like encrypting email within applications, restricting network access by time of day, setting up firewalls and key-based SSH authentication. The book aims to help administrators secure their systems without needing to look up complex syntax. It covers topics like system integrity checks with Tripwire, firewall configuration with iptables, network access control, authentication techniques and authorization controls.