docker copy code example

Example 1: copy files from a docker container to the host machine using cmd

docker cp <containerId>:/file/path/within/container /host/path/target

Example 2: copy file from docker container to host

docker cp <containerId>:/file/path/within/container /host/path/target

Example 3: copy file to docker container

docker cp foo.txt mycontainer:/foo.txt

Example 4: docker ARG

$ docker build --build-arg some_variable_name=a_value

Example 5: docker cp volume

Usage
docker cp [OPTIONS] CONTAINER:SRC_PATH DEST_PATH|-
docker cp [OPTIONS] SRC_PATH|- CONTAINER:DEST_PATH

To copy data from the volume to the host, use a temporary container that has the volume mounted.

CID=$(docker run -d -v hello:/hello busybox true)
docker cp $CID:/hello ./
To copy a directory from the host to volume

cd local_dir
docker cp . $CID:/hello/
Then clean up the temporary container.

docker rm $CID

Example 6: docker copy folder to container

docker cp Desktop/imagesets <container id>:tf_files/flower_photos/imagesets