A page that teaches you just enough Ruby to let you use Chef.

A list of default usernames for Linux AMI's in Amazon's EC2.

• Amazon Linux - ec2-user
• Ubuntu - ubuntu, root
• Debian - admin, root
• RHEL 6.4 and later - ec2-user
• RHEL 6.3 and earlier - root
• Fedora - fedora, ec2-user, root
• Centos - centos, root
• SUSE- ec2-user, root
• BitNami - bitnami
• TurnKey - root
• NanoStack - ubuntu
• FreeBSD - ec2-user
• OmniOS - root

How to specify relationships between files and packages in puppet.

Vagrant is a utility for automating the deployment of virtualized environments using VirtualBox v4.x. It helps create and configure lightweight, portable virtual instances in a reproducable (i.e., scriptable) fashion. Written in Ruby.

Fabric is a Python module which lets you write scripts in Python that carry out just about any administrative task you might need to carry out without having to fuss with os.shell(), .popen(), or anything else. SSH's into a system (even localhost) and does what you tell it to.