Func is a secure, scriptable remote control framework and API. It is intended to replace SSH scripted infrastructure for a variety of datacenter automation tasks (such as taking hardware inventory, running queries, or executing remote commands) that are run against a large amount of systems at the same time.
Read more on func.et.redhat.com ☞
edit = as of Sept. 2018 I’ve seen that the previous is a broken-link. Func was the grandparent of Ansible and all the official pages are now gone. Anyway there are pages like this one remembering how innovative it was.