What Are Containers?
Containers are lightweight piece of software that contains all the code, libraries, and dependencies that the application needs to run. Containers do not have their own operating system, they get resources from the host operating system. Because they do not have an operating system of their own they are lightweight. They are also easily portable as they contain all the libraries and the dependencies to run the application.
Docker – Containers & Shells
Docker is a set of platforms as a service (PaaS) products that use Operating system-level virtualization to deliver software in packages called containers. Containers are isolated from one another and bundle their own software, libraries, and configuration files; they can communicate with each other through well-defined channels. All containers are run by a single operating system kernel and therefore use fewer resources than a virtual machine.
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