Shivraj Salunkhe's Blog

CheatSheet For Docker CLI

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Shivraj Salunkhe
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3 min read

Table of contents

Run a new Container

  • Start a new Container from an Image
docker run IMAGE
docker run nginx
  • and assign it a name
docker run --name CONTAINER IMAGE
docker run --name web nginx
  • and map a port
docker run -p HOSTPORT:CONTAINERPORT IMAGE
docker run -p 8080:80 nginx
  • and map all ports
docker run -P IMAGE
docker run -P nginx
  • and start container in background
docker run -d IMAGE
docker run -d nginx
  • and assign it a hostname
docker run --hostname HOSTNAME IMAGE
docker run --hostname srv nginx
  • and add a dns entry
docker run --add-host HOSTNAME:IP IMAGE
  • and map a local directory into the container
docker run -v HOSTDIR:TARGETDIR IMAGE
docker run -v ~/:/usr/share/nginx/html nginx
  • but change the entrypoint
docker run -it --entrypoint EXECUTABLE IMAGE
docker run -it --entrypoint bash nginx

Manage Containers

  • Show a list of running containers
docker ps
  • Show a list of all containers
docker ps -a
  • Delete a container
docker rm CONTAINER
docker rm web
  • Delete a running container
docker rm -f CONTAINER
docker rm -f web
  • Delete stopped containers
docker container prune
  • Stop a running container
docker stop CONTAINER
docker stop web
  • Start a stopped container
docker start CONTAINER
docker start web
  • Copy a file from a container to the host
docker cp CONTAINER:SOURCE TARGET
docker cp web:/index.html index.html

Copy a file from the host to a container

docker cp TARGET CONTAINER:SOURCE
docker cp index.html web:/index.html

Start a shell inside a running container

docker exec -it CONTAINER EXECUTABLE
docker exec -it web bash
  • Rename a container
docker rename OLD_NAME NEW_NAME
docker rename 096 web
  • Create an image out of container
docker commit CONTAINER
docker commit web

Manage Images

  • Download an image
docker pull IMAGE [: TAG]
docker pull nginx
  • Upload an image to a repository
docker push IMAGE
docker push myimage:1.0
  • Delete an image
docker rmi IMAGE
  • Show a list of all Images
docker images
  • Delete dangling images
docker image prune
  • Delete all unused images
docker image prune -a
  • Build an image from a Dockerfile
docker build DIRECTORY
docker build .
  • Tag an image
docker tag IMAGE NEWIMAGE
docker tag ubuntu ubuntu: 18.04
  • Build and tag an image from a Dockerfile
docker build -t IMAGE DIRECTORY
docker build -t myimage
  • Save an image to .tar file
docker save IMAGE › FILE
docker save nginx › nginx.tar
  • Load an image from a tar file
docker load -i TARFILE
docker load -i nginx.tar

Info & Stats

  • Show the logs of a container
docker logs CONTAINER
docker logs web
  • Show stats of running containers
docker stats
  • Show processes of container
docker top CONTAINER
docker top web
  • Show installed docker version
docker version
  • Get detailed info about an obiect
docker inspect NAME
docker inspect nginx
  • Show all modified files in container
docker diff CONTAINER
docker diff web
  • Show mapped ports of a container
docker port CONTAINER
docker port web

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