Welcome to the Docker-cheat-page wiki!

Docker build -command

$ docker build --rm -t <name>:<optional-tag> <directory_with_dockerfile>

• --rm removes intermediate containers
• -t is used to the container a name and an option tag. If tag is not specified it will be 'latest'

For example, if you want to create image from your current working directory, replace <directory_with_dockerfile> with '.'

https://docs.docker.com/engine/reference/commandline/build/

Docker run -command. Creates a container with specified image

$ docker run --rm -d -p 8080:8081 <IMAGE>

• --rm Automatically removes the container when it exits
• -d Stands for 'detached'. Runs container as a daemon process (in the background, so it won't take up your terminal)
• -p <port>:<port> Stands for 'publish'. First part specifies the host's port to be mapped and the second part specifies container's port that is published to the host
• You can also replace -p flag with -P flag. The -P flag will publish all the ports you EXPOSEd in your Dockerfile and bind them to the host. Then you can remove the ports in the above command.

You can also add --name <containerName> if you want to identify your containers more easily

https://docs.docker.com/engine/reference/commandline/run/#extended-description

To access docker container's command line, run:

$ docker exec -it <CONTAINER>

https://docs.docker.com/engine/reference/commandline/exec/

$ docker info

https://docs.docker.com/v17.12/engine/reference/commandline/info/

$ docker ps

Add -a flag if you want to see all of your containers (default shows only running containers).

https://docs.docker.com/engine/reference/commandline/ps/

$ docker images

Add -a flag if you want to see all of your images (default hides intermediate images).

https://docs.docker.com/engine/reference/commandline/images/

$ docker stop <CONTAINER>

https://docs.docker.com/v17.12/engine/reference/commandline/stop/

$ docker rm <CONTAINER>

https://docs.docker.com/engine/reference/commandline/rm/

$ docker image prune

Removes unused docker images

https://docs.docker.com/engine/reference/commandline/image_prune/

See more information about dangling images: https://www.projectatomic.io/blog/2015/07/what-are-docker-none-none-images/

https://medium.freecodecamp.org/expose-vs-publish-docker-port-commands-explained-simply-434593dbc9a3