The Puppet 3 Beginner’s Guide is the perfect introduction to Puppet 3 for complete beginners, taking you from download and installation to completely automating your infrastructure with Puppet.
The Puppet 3 Cookbook takes you beyond the basics to explore the full power of Puppet, showing you in detail how to tackle a variety of real-world problems and applications.
Hardening your systems, and deterring and detecting intruders.
Here are a few things you need to tweak in order to improve OpenSSH server security.
Follow @bitfield on Twitter here: http://twitter.com/bitfield