001. save image
002. run image
003. mount folder on image
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001. save image
docker ps -a
docker commint container-id image-name-what-you-want:tag-name-what-you-want
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002. run image
docker run -i -t mlearn:init
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003. mount folder on image
docker run -i -t -v /d:code/:/linuxcode mlearn:init bin/bash