Infrastructure management has come a long way. (Mostly) gone are the days of manual configurations and deployments, when using SSH in a "for" loop was a perfectly reasonable way to execute server changes. Automation is a way of life.
Configuration management tools like Chef, Puppet, and Ansible — once on the bleeding edge — are now used by most enterprises. With infrastructure automation, you get a central place for managing all of your systems, networks, and devices — both on-prem and in the cloud — so you can deploy infrastructure and applications faster, without sacrificing reliability.