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30 lines
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FAQ
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===
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Most frequently asked questions.
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---------------------------------------------
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1. How much does Docker cost?
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Docker is 100% free, it is open source, so you can use it without paying.
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2. What open source license are you using?
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We are using the Apache License Version 2.0, see it here: https://github.com/dotcloud/docker/blob/master/LICENSE
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3. Does Docker run on Mac OS X or Windows?
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Not at this time, Docker currently only runs on Linux, but you can use VirtualBox to run Docker in a virtual machine on your box, and get the best of both worlds. Check out the getting started guides for help on setting up your machine.
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4. How do containers compare to virtual machines?
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Containers are more light weight and can start in less then a second, and are great for lots of different tasks, but they aren't as full featured as virtual machines.
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5. Can I help by adding some questions and answers?
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Definitely! You can fork the repo and edit the documentation sources right there.
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Looking for something else to read? Checkout the :ref:`hello_world` example.
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