Bit of a personal plug, but I've put together a screencast about Docker, and people seem to think it is helpful at giving an overview @ https://sysadmincasts.co

Bit of a personal plug, but I've put together a screencast about Docker, and people seem to think it is helpful at giving an overview @ https://sysadmincasts.com/episodes/31-introduction-to-docker https://sysadmincasts.com/episodes/31-introduction-to-docker