Introduction to Docker: Glossary

Images are series of zip files that act as templates for containers.

Containers are runtime instantiation of images — images with state and are native processes.

Pull images with docker pull

List images with docker images

Image tags distinguish releases or version and are appended to the image name with a colon

Run containers with docker run

Monitor containers with docker ps

Exit interactive sessions just as you would a shell

Restart stopped containers with docker start

Learn how docker cp works

Learn about volume mounts

Show port forwarding of applications

Dockerfiles are written as text file commands to the Docker engine

Docker images are built with docker build

Built time variables can be defined with ARG and set with --build-arg

ENV arguments persist into the container runtime

Docker images can have multiple tags associated to them

Docker images can use COPY to copy files into them during build

Remove containers with docker rm

Remove images with docker rmi

Perform faster cleanup with docker container prune, docker image prune, and docker system prune

Breaks are helpful in the service of learning

CMD provide defaults for an executing container

CMD can provide options for ENTRYPOINT

ENTRYPOINT allows you to configure commands that will always run for an executing container

CI can be used to build images automatically

Containers are extensive