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Applications have become hard to implement. Getting a dedicated server, installing, setting up and maintaining applications are just the beginning. With complex and tightly coupled systems, different services and programming languages, there’s always the chance that things will break.

Docker makes delivering software easy again. It allows you to set up everything — the software you’ve developed, the OS it will run on, the services it needs, the modules and back-end tools such as cron jobs. All of it can be set up to run in minutes, with the guarantee that it will work on the target system as well as it works on your development environment. Our Docker Cheat Sheet gathers all the commands you’re most likely to need in your Docker workflow, so that you can focus on your work and not on searching the deepest, darkest corners of Google. Enjoy!

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Frequently Asked Questions (FAQs) about Docker Cheat Sheet

What is Docker and why is it important?

Docker is an open-source platform that automates the deployment, scaling, and management of applications. It uses containerization technology to bundle an application and its dependencies into a single object. This allows the application to run reliably and consistently on any system that Docker supports, regardless of any customized settings that system might have that could differ from the machine on which the application was developed. Docker is important because it simplifies the process of managing and deploying applications, making it easier for developers to work and for systems to run applications.

How do I install Docker?

Docker can be installed on a variety of operating systems including Windows, macOS, and various distributions of Linux. The installation process varies depending on the operating system. Detailed instructions for each operating system can be found on the official Docker documentation.

What is a Docker image?

A Docker image is a lightweight, standalone, executable package that includes everything needed to run a piece of software, including the code, a runtime, libraries, environment variables, and config files. Docker images are built from Dockerfiles, which are scripts that contain a collection of commands that Docker uses to build an image.

What is a Docker container?

A Docker container is a runtime instance of a Docker image. In other words, it is the execution of an image, or an image brought to life. Containers run the actual instances of the applications. A container includes an application and all of its dependencies. It shares the kernel with other containers and runs as an isolated process in user space on the host operating system.

How do I create a Docker container?

Docker containers are created by running a Docker image. The docker run command is used to create a container from an image. The syntax of the command is docker run [OPTIONS] IMAGE[:TAG|@DIGEST] [COMMAND] [ARG...].

How do I stop a Docker container?

Docker containers can be stopped using the docker stop command followed by the container ID. The syntax of the command is docker stop [OPTIONS] CONTAINER [CONTAINER...].

How do I remove a Docker container?

Docker containers can be removed using the docker rm command followed by the container ID. The syntax of the command is docker rm [OPTIONS] CONTAINER [CONTAINER...].

How do I list all Docker containers?

All Docker containers, both running and stopped, can be listed using the docker ps -a command.

How do I pull a Docker image from a Docker registry?

Docker images can be pulled from a Docker registry using the docker pull command followed by the name of the image. The syntax of the command is docker pull [OPTIONS] NAME[:TAG|@DIGEST].

How do I push a Docker image to a Docker registry?

Docker images can be pushed to a Docker registry using the docker push command followed by the name of the image. The syntax of the command is docker push [OPTIONS] NAME[:TAG].