Docker Tutorial for Beginners #4 What is a Docker Image

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A Docker image is a file used to execute code in a Docker container. Docker images act as a set of instructions to build a Docker container, like a template. Docker images also act as the starting point when using Docker. An image is comparable to a snapshot in virtual machine (VM) environments.


A Docker image is a read-only template containing a set of instructions for creating a container that can run on the Docker platform. It provides a convenient way to package up applications and preconfigured server environments, which you can use for your own private use or share publicly with other Docker users. Docker images are also the starting point for anyone using Docker for the first time.


A Docker image is made up of a collection of files that bundle together all the essentials – such as installations, application code, and dependencies – required to configure a fully operational container environment.

A Docker image is a lightweight, standalone, and executable package that includes all the necessary components needed to run a piece of software. It serves as a blueprint for creating Docker containers. Docker images encapsulate an application's code, runtime, system tools, libraries, and other settings required for the application to run consistently across different environments.


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