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# Installing Docker
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Follow the [Official Guide ](https://docs.docker.com/engine/installation ).
Googlers: [go/installdocker ](https://goto.google.com/installdocker ).
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[Why Docker? ](faq.md#why-do-you-use-docker )
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*NOTE: (Optional) If you want to run `docker` without `sudo` , follow the [Create a docker group ](https://docs.docker.com/engine/installation/linux/ubuntulinux/#/create-a-docker-group ) section.*
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*NOTE: Docker images can consume significant disk space. Run*
*[docker-cleanup](https://gist.github.com/mikea/d23a839cba68778d94e0302e8a2c200f)*
*periodically to garbage collect unused images.*
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