Docker is a platform that allows developers to package applications and their dependencies into a single, portable unit called a container. Containers ensure that applications run consistently across different environments, making development, testing, and deployment faster and more reliable.<\/p>\n\n\n\n
Docker is an open-source tool designed to make it easier to create, deploy, and run applications by using containers. Unlike traditional virtual machines, containers share the host system\u2019s operating system, making them lightweight and efficient.<\/p>\n\n\n\n
Containers are lightweight, portable, and self-sufficient units that contain everything an application needs to run, including code, runtime, libraries, and configuration files.<\/p>\n\n\n\n
Images are read-only templates used to create containers. They can be built from scratch or based on other images and can include the operating system, application code, and dependencies.<\/p>\n\n\n\n
The Docker Engine is the runtime that allows you to build and run Docker containers on your system. It provides tools and APIs to manage containers efficiently.<\/p>\n\n\n\n
Docker Hub is a cloud-based registry where users can share and store Docker images. It allows easy distribution of prebuilt images for popular applications.<\/p>\n\n\n\n
To start a container from an image:<\/p>\n\n\n\n
docker run image_name<\/pre>\n\n\n\nListing Containers<\/h3>\n\n\n\n
To view all running containers:<\/p>\n\n\n\n
docker ps<\/pre>\n\n\n\nTo view all containers including stopped ones:<\/p>\n\n\n\n
docker ps -a<\/pre>\n\n\n\nStopping a Container<\/h3>\n\n\n\n
To stop a running container:<\/p>\n\n\n\n
docker stop container_id<\/pre>\n\n\n\nRemoving a Container<\/h3>\n\n\n\n
To delete a container:<\/p>\n\n\n\n
docker rm container_id<\/pre>\n\n\n\nPulling an Image<\/h3>\n\n\n\n
To download an image from Docker Hub:<\/p>\n\n\n\n
docker pull image_name<\/pre>\n\n\n\nBuilding an Image<\/h3>\n\n\n\n
To create an image from a Dockerfile:<\/p>\n\n\n\n
docker build -t image_name .<\/pre>\n\n\n\nBest Practices<\/h2>\n\n\n\n
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- Keep images small by minimizing unnecessary dependencies<\/li>\n\n\n\n
- Use official images when possible for security and reliability<\/li>\n\n\n\n
- Regularly update images to include security patches<\/li>\n\n\n\n
- Separate applications into multiple containers for better scalability<\/li>\n<\/ul>\n\n\n\n
Summary<\/h2>\n\n\n\n
Docker is a powerful tool that simplifies application development, testing, and deployment. By understanding containers, images, and Docker commands, developers can create consistent and efficient workflows across multiple environments.<\/p>\n\n\n