Docker Basics: Core Concepts and Commands for Beginners Explained

Docker is a containerization platform that packages an application along with all its dependencies, ensuring it runs consistently across different environments such as local machines, test servers, and production. The platform operates through a Docker Client that sends commands to a background process called the Docker Daemon, which manages images, containers, networks, and volumes. Docker Images serve as read-only templates used to create lightweight, isolated, and portable Containers, while a Docker Registry like Docker Hub is where images are stored and shared publicly. Essential beginner commands include docker pull to download images, docker run to create and start containers, docker ps to list running containers, and docker exec to interact with a running container. Additional commands such as docker logs for viewing output and docker system prune for cleaning up unused resources help developers manage their Docker environment effectively.