Docker Cheat Sheet
Installation
curl -sSL https://get.docker.com | sh
Docker
Basic Commands
| Command | Description |
|---|---|
docker --version | Display Docker version. |
docker info | Display system-wide information. |
docker help | Display help for a command. |
docker stats | Show stats of running containers |
Container Operations
| Command | Description |
|---|---|
docker run <options> <image> | Start a container from an image. |
docker run --name <name> <image> | Specify a container name |
docker run -d <image> | Start a container in background |
docker run -v <hostdir>:<targetdir> <image> | Map a local directory into the container when running |
docker run -p <hostport>:<targetport> <image> | Publish container's port(s) to the host |
docker exec -it <container> <command> | Execute a command in a running container. |
docker exec -it <container> <executable> | Start a shell inside a running container |
docker commit <container> | Create an image out of container |
docker cp <container>:<source> <target> | Copy a file from a container to the host |
docker cp <target> <container>:<source> | Copy a file from the host to a container |
docker port <container> | Show mapped ports of a container |
docker ps -a | List all containers. |
docker ps | List running containers. |
docker rename <old_name> <new_name> | Rename a container |
docker rm <container> | Remove a stopped container. |
docker start <container> | Start a stopped container. |
docker stop <container> | Stop a running container. |
Image Operations
| Command | Description |
|---|---|
docker images | List images. |
docker pull <image> | Pull an image from a Docker registry. |
docker rmi <image> | Remove an image. |
docker build -t <tag> . | Build an image from a Dockerfile. |
docker push <image> | Upload an image to a repository |
docker image prune | Delete dangling images |
docker image prune -a | Delete all unused images |
docker build <directory> | Build an image from a Dockerfile |
docker tag <image> <new_image> | Tag an image |
docker save <image> > <file> | Save an image to tar file |
docker load -i <tarfile> | Load an image from a tar file |
Docker Registry
| Command | Description |
|---|---|
docker login | Log into a Docker registry. |
docker logout | Logout from a Registry |
docker tag <source_image>:<tag> <repository>:<tag> | Tag an image. |
docker push <repository>:<tag> | Push an image to a registry. |
docker search text | Search for an Image on the Official Registry |
docker save -o <repo_tag.tar> <repo>:<tag> | Export an Image/Repository as a Tarball |
Docker Networks
| Command | Description |
|---|---|
docker network ls | List networks. |
docker network create <name> | Create a new network. |
docker network connect <network> <container> | Connect a container to a network. |
docker network disconnect <network> <container> | Disconnect a container from a network. |
docker network rm <network> | Remove a network. |
Docker Volumes
| Command | Description |
|---|---|
docker volume create <name> | Create a volume. |
docker volume ls | List volumes. |
docker volume rm <volume> | Remove a volume. |
Cleaning Up
| Command | Description |
|---|---|
docker system prune | Remove unused data (containers, volumes, networks, and images). |
docker container prune | Remove all stopped containers. |
docker image prune | Remove unused images. |
Dockerfile
| Command | Description |
|---|---|
FROM <image> | Base image for the build. |
MAINTAINER <email> | Set the name of the maintainer (metadata). |
COPY <source> <destination> | Copy files or directories from the context into the container at the specified destination. |
ADD <source> <destination> | Similar to COPY but can untar archives and accepts HTTP URLs as well. |
RUN <args> | Execute an arbitrary command inside the container during the build process. |
USER <name> | Set the default username or user context for subsequent commands. |
WORKDIR <path> | Set the default working directory for the container. |
CMD <args> | Set the default command to be executed when the container starts. This can be overridden at runtime. |
ENV <name> <value> | Set an environment variable with the specified name and value inside the container. |
Docker Compose
| Command | Description |
|---|---|
docker-compose up | Start services defined in a docker-compose.yml file. |
docker-compose down | Stop and remove all services defined in the file. |
docker-compose logs | View logs from services. |
Docker Swarm
| Command | Description |
|---|---|
docker service ls | List all services in the Swarm |
docker stack services <stack_name> | See all running services |
docker service logs <stack_name> <service_name> | See all services logs |
docker service scale stack_name_service_name=replicas | Scale services across nodes |
docker image prune | Prune unused (dangling) images |
docker image prune -a | Remove all images (including unused containers) |
docker system prune | Prune the entire system (including volumes and database info) |
docker swarm leave | Leave Swarm |
docker stack rm <stack_name> | Remove Swarm (deletes all volume data and database info) |
docker kill $(docker ps -q) | Kill all running containers |