36 lines
1.5 KiB
Markdown
36 lines
1.5 KiB
Markdown
---
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title: Docker
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---
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## Docker
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[Docker](https://www.docker.com/) is a widely-used container platform available for Linux, Windows, and Mac, as well as cloud providers like AWS and Azure.
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A common use case would be to package an app and all its requirements in a container. The container can then be used during development, passed to quality assurance/testing, and on to production/operations. This eliminates the "works on my machine" mentality, as the container effectively _is_ the machine, no matter what actual hardware it may be running on.
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After you are done setting up your computer and installing Docker, you can simply test your Docker by running the command:
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```shell
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$ docker run hello-world
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Unable to find image 'hello-world:latest' locally
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latest: Pulling from library/hello-world
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ca4f61b1923c: Pull complete
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Digest: sha256:ca0eeb6fb05351dfc8759c20733c91def84cb8007aa89a5bf606bc8b315b9fc7
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Status: Downloaded newer image for hello-world:latest
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Hello from Docker!
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This message shows that your installation appears to be working correctly.
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...
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```
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If you have no hello-world image locally, Docker will automatically download it to your machine.
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You can list the image that was downloaded or created to your machine by running the command:
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```shell
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$ docker image ls
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```
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[Docker Store](https://hub.docker.com/explore/) contains many common applications that are packaged up into containers and are ready to be used.
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## Further reading
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* [Docker Documentation](https://docs.docker.com)
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