Not sure if it was on HN but it was a short story about an old retired sys admin in an age where everything runs on the cloud. One day, something went wrong in a data center and he was called to fix it because robots manage everything now and nobody knows how to fix things anymore. He was accompanied by a younger sysadmin IT person as he fixed a server or something. By the end of it, the younger IT person wanted to learn about how computer works and be a sysadmin.