Just some basic docker commands:
Guide
Config
Add user to docker group (for non-root docker admin)
sudo groupadd docker sudo usermod -aG docker $USER newgrp docker
Manage images
List images
docker image ls
Remove images
Remove all dangling images (e.g. those that are not tagged or referenced by a container):
docker image prune
Remove all images not currently in-use by an existing container:
docker image prune -a
Update a docker image
docker pull <image>
Where <image> is the docker image, e.g. "prom/prometheus".
Update all docker images at once
docker images |grep -v REPOSITORY|awk '{print $1}'|xargs -L1 docker pull
Manage containers
View container logs
To output and follow logs of a container use the -f or --follow flags:
docker logs -f <container>
To show extra details (such as env variables etc.) use the --details flag:
docker logs --details <container>
List containers
Show running:
docker container ls
Show all:
docker container ls --all
Start / stop / restart container
docker <start|stop|restart> <container>
Remove container
docker rm <container>
The below will stop and remove (delete) a container
docker rm -f <container>
List container port mappings
docker port <container>
Copy file(s) from container to host
docker cp <container>:/file/path/within/container /host/path/target
Interactively log into container with bash
docker exec -it <container> /bin/bash
Cleaning
This will delete all stopped containers, all networks not used, all dangling images, and all build cache:
docker system prune
References
- https://docs.docker.com/
- https://www.googlinux.com/update-all-docker-images/index.html
- https://stackoverflow.com/questions/22049212/copying-files-from-docker-container-to-host
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