Facter

If you're looking for a powerful and flexible tool for retrieving facts from operating systems, look no further than Facter. This free, open source Ruby library is cross-platform and supports multiple resolution mechanisms, with the ability to restrict certain mechanisms to specific operating systems or environments.

Whether you need to retrieve operating system names, MAC addresses, IP addresses, or SSH keys, Facter is an incredibly useful tool. Its flexibility and customizable options make it a must-have for any developer or system administrator who needs to work across different operating systems and environments.

Overall, Facter is a solid choice for anyone who needs to retrieve data from different operating systems in a reliable and easy-to-use way. Give it a try and see just how much it can streamline your workflows and improve your productivity.