An open-source guide to help you write better command-line programs, taking traditional UNIX principles and updating them for the modern day. Aanand Prasad Engineer at Squarespace, co-creator of Docker Compose. @aanandprasad Ben Firshman Co-founder of Replicate , co-creator of Docker Compose. @bfirsh Carl Tashian Offroad Engineer at Smallstep , first engineer at Zipcar, co-founder Trove. tashian.com @tashian Eva Parish Technical Writer at Squarespace, O’Reilly contributor. evaparish.com @evpari Design by Mark Hurrell . Thanks to Andreas Jansson for early contributions, and Andrew Reitz, Ashley Williams, Brendan Falk, Chester Ramey, Dj Walker-Morgan, Jacob Maine, James Coglan, Michael Dwan, and Steve Klabnik for reviewing drafts. Join us on Discord if you want to discuss the guide or CLI design. Foreword In the 1980s, if you wanted a personal computer to do something for you, you needed to know what to type when confronted with C:\> or ~$ . Help came in the form of thick, spiral-bound manuals.…