Literate DevOps with Emacs Org-Babel and Tramp

HN people point to it as the best demonstration of literate devops, showing documentation and execution woven together in Emacs.

Howard Abrams demonstrates, in an EmacsConf 2015 talk, how he uses org-mode's Babel and Tramp to configure and operate remote servers from a single document. Code blocks, their results and the explanatory text all live together.