Snappy Ubuntu is a version of the Ubuntu Core, which is a minimal Ubuntu Linux operating system.
“The command line utility that handles package and update management in Snappy Ubuntu is — snappy,” Kirkland explained to eWEEK. Snappy Ubuntu is intended to be an optimized base for Docker container applications, which are typically referred to as “Dockerized” apps. Kirkland noted that, as Docker services move into production, the Docker host itself should be lean and very secure.
Docker sits on top of a host operating system, which is the base from which multiple Dockerized apps can be deployed. The goal with Snappy Ubuntu is to be a minimalistic, secure, base operating system.