cp command can be used to copy files.
One specific file can be copied TO the container like:
docker cp foo.txt mycontainer:/foo.txt
One specific file can be copied FROM the container like:
docker cp mycontainer:/foo.txt foo.txt
mycontainer is a container ID, not an image ID.
Multiple files contained by the folder
src can be copied into the
target folder using:
docker cp src/. mycontainer:/target docker cp mycontainer:/src/. target
Reference: Docker CLI docs for
In Docker versions prior to 1.8 it was only possible to copy files from a container to the host. Not from the host to a container.