Oxidized is a "RANCID replacement" that has taken on a life of it's own. Designed to automatically store, compare, and log configuration files from network based equipment. I've never used RANCID, or rConfig, or Sweet, but I wanted to more than a fileshare of all the latest configs of our devices, which is what we were doing. Oxidized the seemed the easiest to setup. Here is how I setup one up from scratch.