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# Docker
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Docker is a virtualization software that deploys docker containers.
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Due to easy handling and reproducable environments it is a useful tool.
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## Installation
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- Arch linux: run `pacman -S docker` to install docker
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- Ubuntu: visit [the official installation guide](https://docs.docker.com/engine/install/ubuntu/)
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## Run Docker as non-root user
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To run docker as a non-root user you need to add your user to the `docker` group.
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To do this create the group docker if it doesn't exist `sudo groupadd docker`
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and then add your user to the group using `sudo usermod -aG docker $USER`.
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After that relog into your machine and you should be able to run
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`docker run hello-world`.
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## Tools and Visualisation
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The programs below are useful docker-management systems in different style.
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- [ctop](https://github.com/bcicen/ctop): top-like cli interface for containers
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- [portainer](./docker-images/portainer.md): web ui for managing docker and kubernetes
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## Enable Nvidia GPUs
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To use Nvidia GPUs with docker you need to install the nvidia-cuda-toolkit.
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There is a [guide on marmelab](https://marmelab.com/blog/2018/03/21/using-nvidia-gpu-within-docker-container.html)
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that focusses on that topic.
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