build, run, and share
Flexible: Even the most complex applications can be containerized.
Lightweight: Containers leverage and share the host kernel, making them much more efficient in terms of system resources than virtual machines.
Portable: You can build locally, deploy to the cloud, and run anywhere.
Loosely coupled: Containers are highly self sufficient and encapsulated, allowing you to replace or upgrade one without disrupting others.
Scalable: You can increase and automatically distribute container replicas across a datacenter.
Secure: Containers apply aggressive constraints and isolations to processes without any configuration required on the part of the user.
Containers and virtual machines
Set up your Docker environment
Test Docker version
docker --version docker -v
Test Docker installation
docker run hello-world
docker image ls
docker ps --all