How to Install Docker in Centos 7 linux

How to Install Docker in Centos 7 linux

What is Docker?

Docker is a computer program that performs operating-system-level virtualization also known as containerization. It was first released in 2013 and is developed by Docker, Inc.

Docker is used to run software packages called “containers”. In a typical example use case, one container runs a web server and web application, while a second container runs a database server that is used by the web application. Containers are isolated from each other and use their own set of tools and libraries; they can communicate through well-defined channels. All containers use the same kernel and are therefore more lightweight than virtual machines. Containers are created from “images” which specify their precise contents. Images are often created by combining and modifying standard images downloaded from repositories.

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