This cheat sheet will brush up all basics of docker.
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apt update
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Updates the package sources with the latest versions
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apt install docker.io -y
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Install docker in Ubutu Linux distribution
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systemctl start docker
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Stop docker services
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systemctl stop docker
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Stop docker services
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systemctl restart docker
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Stop and start docker services
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systemctl status docker
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Check the status of docker services
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docker container create --name web -it alpine sh
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Create a named container
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docker container start web
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Start a container
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docker container stop web
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Stop a container
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docker container restart web
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stop and start a container
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docker container run -it --name myweb alpine sh
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create and start a named container
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Ctrl + p, Ctrl + q
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Detach from the container
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docker container attach myweb
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Attach to a running container
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docker container logs myweb
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See the logs of the container
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docker container rename myweb myalpine
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Change the name of a container
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docker container run -h alpine -it --rm alpine sh
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Set the hostnameof a container
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docker container run -it -w /var --rm alpine sh
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Set the current working directory
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docker container run -it --env "WEB_HOST=172.168.1.1" --rm alpine sh
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Set the environment variables
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docker container exec myalpine [command]
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Create any process inside an already running container
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docker version
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prints the current version number
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docker info
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displays system wide information
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docker login
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Log in to a DockerHub registry
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docker logout
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Logout from DockerHub registry
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docker inspect [object]
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Display detailed information on one or more objects.
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docker --help
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list the help on any command
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docker image [option]
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To work with images
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docker container [option]
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To work with containers
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docker volume [option]
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To work with volumes
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docker network [option]
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To work with network
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docker image ls
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List of images
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docker image ls --digests
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List of image digests
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docker container ls
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List of running containers
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docker container ls -a
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List of all containers
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docker container ls -q
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Get only the containers IDs of containers
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docker volume ls
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List of volumes
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docker network ls
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List of networks
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docker search nginx
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List the available images on DockerHub
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docker image pull nginx
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Pull an image from DockerHub
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docker image pull myregistry.com:8080/alpine:latest
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Pull an image from a private registry
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vim Dokerfile
FROM alpine RUN date > /data |
Dockerfile to build an image
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docker image build -t php/alpine:dockerfile .
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Create an image from a Dockerfile
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docker container run -it --name myimage alpine sh
/ # date > /data / # cat /data |
Run a container and modify it.
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docker container diff myimage
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Check the difference with the base image
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docker container commit myimage php/alpine:test
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Save a running container as an image.
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docker container run -it php/alpine:test sh
cat /data |
Run the created image as a container
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docker image push php/alpine:test
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Push the image to DockerHub registry
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docker container run -itv /data --name myvol alpine sh
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Create a directory on the host system and mount it under /data of the container
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docker volume create --name myvolume
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Create a named volume
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docker container run -itv myvolume:/data --name cmyvol alpine sh
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Mount a named volume
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docker system df
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Get the information about disk storage
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docker container run -d --name myweb -p 8080:80 nginx
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Access the container from the external world
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docker container run -d --name myweb1 -P nginx:alpine
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Expose a container port to a random port of the host system
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docker container run -it --network=none alpine sh
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To Request Docker daemon not to create an interface for the container
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docker container run -it --network=host alpine sh
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share the network namespace of the host system with the container
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docker container run -it --network=container:myweb1 alpine sh
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Share the network namespace of an existing container
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docker network create mynetwork
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Create a user defined network
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docker container run -d --name nginxnet --network=mynetwork nginx:alpine
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Create a container and attach it to the network
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docker network connect mynetwork web
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Attach a running container to a network
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docker network disconnect mynetwork web
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Disconnect from a specific network
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docker container run -it --ulimit nproc=10 --rm alpine sh
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Set the maximum number of processes the container can create
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docker container run -d --name cpulimit --cpuset-cpus="0" alpine top
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Container can run only on CPU “0”.
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docker container run -d --name memlimit --memory "200m" alpine top
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Limit the maximum amount of memory usage
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curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
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Install a docker compose
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chmod +x /usr/local/bin/docker-compose
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Set the executable
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mkdir wordpress
cd wordpress/ vim docker-compose.yaml |
Create a folder and yaml file
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docker-compose up
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Start the application in the foreground
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docker-compose up -d
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Start the application in the background
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docker-compose ps
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List containers created by the application
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docker-compose stop
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Stop all the containers for the given application
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docker image rm nginx:alpine
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Remove an image locally
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docker image prune
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Clean an unused/dangling image
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docker container rm -f web
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Delete a running container
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docker container rm myweb
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Delete a stopped container
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docker container prune
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Remove all stopped containers
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docker network rm mynetwork
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Remove a specific network
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docker network prune
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Remove all networks which are not referenced by any containers
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docker volume rm myvolume
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Remove a specific volume
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docker volume prune
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Remove all unused volume
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docker-compose rm
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Remove the containers for the given application
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docker-compose down -v
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Delete the application completely with its containers, networks, volumes and images
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docker system prune
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Remove unused images, stopped containers, and unused networks
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