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Docker is a containerization platform that allows developers to package, ship, and run applications in isolated environments called containers. Containers are lightweight and portable, ensuring consistent performance across different computing environments. Docker enables separation of applications from the underlying infrastructure, making it easier to develop, deploy, and manage applications.
• Portable Deployments: Docker containers run consistently across development, testing, and production environments. • Isolated Environments: Each container runs in its own isolated environment, ensuring no conflicts between applications. • Efficient Resource Usage: Containers share the host system's kernel, making them more lightweight than virtual machines (VMs). • Fast Setup and Teardown: Containers can be spun up and down quickly, enabling rapid deployment and scaling. • Scalability and Orchestration: Docker integrates with tools like Kubernetes for large-scale container orchestration. • Lightweight and Fast: Containers are smaller and start up faster compared to traditional VMs.
docker --version in the terminal.docker pull <image-name>.docker run -p <host-port>:<container-port> <image-name>.docker ps (list running containers), docker stop (stop a container), and docker rm (remove a container).docker build -t <image-name> ..docker push <your-username>/<image-name>.What is a Docker container?
A Docker container is a runtime environment that includes an application and all its dependencies, ensuring consistent behavior across different systems.
How is Docker different from a virtual machine (VM)?
Docker containers share the host system's kernel, making them lighter and faster than VMs, which require a full operating system for each instance.
What is Docker Hub?
Docker Hub is a public registry where users can store, share, and download Docker images, serving as a central resource for containerized applications.