Here I have covered,

• What is Docker?

• What is "Image" in Docker?

• What is a "Container" in Docker?

• What is a "Container Image" in Docker?

• Docker Commands.

What is Docker?

• Docker is a container platform that allows you to build, test and deploy applications quickly.

• A Developer defines all the applications and their dependencies in a Dockerfile which is then used to build docker images that define Docker container.

• Doing this ensures that your application will run in any environment.

What is "Image" in Docker?

• In Docker, an image is a lightweight, stand-alone, executable package that includes everything needed to run a piece of software, including the code, runtime, libraries, environment variables, and any other dependencies.

• Docker images are typically built using a Dockerfile, which is a text file that contains a set of instructions for creating the image.

What is "Container" in Docker?

• A Container is a way to package applications with everything they need inside the package including the dependencies & Configuration.

What is "Container Image" in Docker?

• When running a container, it uses an isolated file system. This custom file system is provided by a container image.

• Since the image contains the container's file system, it must contain everything needed to run an application -all dependencies, configurations, scripts, binaries etc.

• The image also contains other configurations for the container such as environment variables, a default command to run and other metadata.

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How to check Docker Version?

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Docker Commands:

• docker pull <image_name> -> This command is used to image from the local repository or from DockerHub.

• docker container -> This command is used to list all the containers of images.

• docker run <image_id> -> Docker run means to run an image to create a container.

Docker Desktop AppView

Running in Interactive Environment

• docker inspect <image_id> -> It will give all the information of the container.(eg.state,path,id)

• docker port -> This command is used for mapping port for containers.

WebView on httpport:27017

• docker stats <image_id> -> This command shows the resource usage statistics for one or more containers.

• docker top <container_id> -> This command shows the processes running inside a container.

• docker save -> This command is used to save an image to a tar archive. docker save [OPTIONS] IMAGE [IMAGE...]

• docker load -> This command is used to load an image from a tar archive.

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Happy Learning :)