Docker is open-source, virtualization software designed to ease specific application development. It is based on PaaS (platform-as-a-service) products model aimed at isolating virtualised environments to deploy, build, and test applications that are usually incompatible or not meant to work with the current OS.

The software in itself is fairly easy to master but the terminology related to docker can be quite baffling at times. As docker creates novel craze in virtualization, terms like images, images, containers, Docker files, and volumes will need to be mastered.