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Docker

Docker is a platform for developers and sysadmins to develop, deploy, and run applications with containers.

Containerization is increasingly popular because containers are:

  • Flexible: Even the most complex applications can be containerized.
  • Lightweight: Containers leverage and share the host kernel.
  • Interchangeable: You can deploy updates and upgrades on-the-fly.
  • Portable: You can build locally, deploy to the cloud, and run anywhere.
  • Scalable: You can increase and automatically distribute container replicas.
  • Stackable: You can stack services vertically and on-the-fly.

Docker Benefits

  • Accelerate developer onboarding
  • Eliminate app conflicts
  • Environment consistency
  • Ship softare faster

Dis

Containers don't run at bare-metal speeds. Persistent data storage is complicated. Not all applications benefit from containers. Increased complexity due to an additional layer. Managing a huge amount of containers is challenging

List Docker CLI commands

docker
docker container --help

## Display Docker version and info
docker --version
docker version
docker info

## Key Docker Client Commands
docker pull <image-name>
docker run <image-name>
docker image ls
docker rmi <image-name>

## List Docker containers (running, all, all in quiet mode)
docker container ls
docker container ls --all
docker container ls -aq
docker ps
docker rm <container-id>