Introduction

Docker is a software that offers a set of platform-as-a-service products for developing and deploying applications by packaging software in containers.

Containers are lightweight, portable, virtual environments that developers can share without risking inconsistencies in development. Due to these incredibly useful features, many organizations have switched from using virtual machines to Docker containers.

Like any other software, Docker introduces users to a new range of terminology related to its services. Users need to get acquainted with concepts such as Dockerfiles, images, containers, and other Docker-specific words. Once you have mastered the vocabulary, the next step is to get used to using Docker commands. A list of all the commands and options is quite extensive and would take time to learn them all by heart.

No matter if you are new to Docker or already have some experience with containerization, it is always good to have a reference point for all the common Docker commands.

In this tutorial, you will find the most common Docker commands along with a downloadable cheat sheet. 

Cheat sheet with the list of useful docker commands.

List of Docker Commands

Docker Container Commands

In this section you will find the most important commands related to the lifecycle of Docker containers.

Create a container (without starting it):

docker create [IMAGE]

Rename an existing container:

docker rename [CONTAINER_NAME] [NEW_CONTAINER_NAME]

Run a command in a new container:

docker run [IMAGE] [COMMAND]

docker run --rm [IMAGE] – removes a container after it exits.

docker run -td [IMAGE] – starts a container and keeps it running.

docker run -it [IMAGE] – starts a container, allocates a pseudo-TTY connected to the container’s stdin, and creates an interactive bash shell in the container.

docker run -it-rm [IMAGE] – creates, starts, and runs a command inside the container. Once it executes the command, the container is removed.

Delete a container (if it is not running):

docker rm [CONTAINER]

Update the configuration of one or more containers:

docker update [CONTAINER]

Starting and Stopping Containers

The following commands show you how to start and stop processes in a particular container.

Start a container:

docker start [CONTAINER]

Stop a running container:

docker stop [CONTAINER]

Stop a running container and start it up again:

docker restart [CONTAINER]

Pause processes in a running container:

docker pause [CONTAINER]

Unpause processes in a running container:

docker unpause [CONTAINER]

Block a container until others stop (after which it prints their exit codes):

docker wait [CONTAINER]

Kill a container by sending a SIGKILL to a running container:

docker kill [CONTAINER]

Attach local standard input, output, and error streams to a running container:

docker attach [CONTAINER]

Note: If you are still unsure of how Docker images and containers differ, you may want to check out the article on Images vs Containers.


Docker Image Commands

Below you fill find all the necessary commands for working with Docker images.

Create an image from a Dockerfile:

docker build [URL]

docker build -t – builds an image from a Dockerfile in the current directory and tags the image

Pull an image from a registry:

docker pull [IMAGE]

Push an image to a registry:

docker push [IMAGE]

Create an image from a tarball:

docker import [URL/FILE]

Create an image from a container:

docker commit [CONTAINER] [NEW_IMAGE_NAME]

Remove an image:

docker rmi [IMAGE]

Load an image from a tar archive or stdin:

docker load [TAR_FILE/STDIN_FILE]

Save an image to a tar archive, streamed to STDOUT with all parent layers, tags, and versions:

docker save [IMAGE] > [TAR_FILE]

Docker Commands for Container and Image Information

Once you set up your containers, you will need to know how to get all the important information for managing them. The following commands will provide details on images and containers on your system.

List running containers:

docker ps

docker ps -a – lists both running containers and ones that have stopped

List the logs from a running container:

docker logs [CONTAINER]

List low-level information on Docker objects:

docker inspect [OBJECT_NAME/ID]

List real-time events from a container:

docker events [CONTAINER]

Show port (or specific) mapping for a container:

docker port [CONTAINER]

Show running processes in a container:

docker top [CONTAINER]

Show live resource usage statistics of containers:

docker stats [CONTAINER]

Show changes to files (or directories) on a filesystem:

docker diff [CONTAINER]

List all images that are locally stored with the docker engine:

docke image ls

Show the history of an image:

docker history [IMAGE]

Networks

One of the most valuable features of Docker software is the ability to connect containers to each other and to other non-Docker workloads. This section covers network-related commands.

List networks:

docker network ls

Remove one or more networks:

docker network rm [NETWORK]

Show information on one or more networks:

docker network inspect [NETWORK]

Connects a container to a network:

docker network connect [NETWORK] [CONTAINER]

Disconnect a container from a network:

docker network disconnect [NETWORK] [CONTAINER]

Docker Commands Cheat Sheet

You can find all the listed commands in a convenient one-page reference sheet seen below. To save it for future use, you can also download our Docker Command Cheat Sheet.

DOWNLOAD Cheat Sheet

Downloadable docker commands cheat sheet with instructions on container and image lifecycle, starting and stopping containers, networking and other information.

Conclusion

This list of commonly used Docker commands should help you become more familiar with them. The cheat sheet will be helpful when you want to create and manage containers, images, and networks.


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