mitchellh/vagrant — pull request #2697 by Ninjamoose (2013-12-20 21:20:28+00:00)
Title: Docker Docs: CMD command correction

Based on the description of the cmd option for the Docker provisioner, I'm guessing the link to the Dockerfile docs should point to the CMD instruction, not the RUN instruction. RUN simply specifies a step in the docker image build process. CMD is the instruction that sets a default command to run inside the container when it's started.