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One of the biggest benefits of containerization is that it enables developers to package their apps with all dependencies needed to run on any Linux distribution. This removes the need to each dependency manually. Multiple containers can run simultaneously, each based on the same or different images.

In later versions of Docker, it provides the use of multi-stage dockerfiles. Using multi-stage dockerfiles, you can use several base images as well as previous intermediate image layers to build a new image layer.

It's ok to have multiple processes, but to get the most benefit out of Docker, avoid one container being responsible for multiple aspects of your overall application. You can connect multiple containers using user-defined networks and shared volumes.

When you run a containerized environment, you essentially create a read-write copy of that filesystem (docker image) inside the container. This adds a container layer which allows modifications of the entire copy of the image. You can create an unlimited number of Docker images from one image base.

All of the container images are created from the base image. This is an empty first layer that allows users to build their first Docker images from scratch.

You can access the image view from within Docker Desktop and from the image tag page on Docker Hub. The view provides a breakdown of the image hierarchy (base images), image layers, packages, and vulnerabilities. The image view lets you inspect the composition of an image from different perspectives.

A container image is composed of layers, added on to a parent image (also known as a base image). Layers make it possible to reuse components and configurations across images. Constructing layers in an optimal manner can help reduce container size and improve performance.

The following are some of the most useful Docker images: Ubuntu. This is one of the most downloaded Docker images in the industry. ... Alpine. For those who want something smaller, the Alpine Linux Docker image is the way to go. ... Nginx. Nginx is the current hot web and proxy server. ... MySQL. ... Redis. ... Elastic Stack. ... WordPress.

Build Docker Image Using Dockerfile Step 1: Create the required Files and folders. ... Step 2: Create a sample HTML file & Config file. ... Step 3: Choose a Base Image. ... Step 3: Create the Dockerfile. ... Step 4: Build your first Docker Image. ... Step 5: Test the Docker Image.

A base image is the image that is used to create all of your container images. Your base image can be an official Docker image, such as Centos, or you can modify an official Docker image to suit your needs, or you can create your own base image from scratch. Parent topic: Docker.