unable to understand docker cp command

Question

I am trying to copy file from docker container to host. I have attached the snapshot in which I listed all the containers as well as container file structure. But when I execute docker cp, it says it could not find the file. Can anyone tell me what wrong am I doing or if I am missing something. I am very new to docker so please guide me through.

When a container path is not absolute, it is assumed relative to the root `/` — yamenk, Dec 04 '17 at 21:33

score 0 · Accepted Answer · answered Dec 04 '17 at 20:59

0

I think you need to absolute path to the file inside the container. See the following.

Copying files from Docker container to host

docker cp <CONTAINER>:/<ABS_PATH>/procfile .

answered Dec 04 '17 at 20:59

Adam

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score 0 · Answer 2 · answered Dec 04 '17 at 21:32

As documented for the docker cp command:

The docker cp command assumes container paths are relative to the container’s / (root) directory

Thus CONTAINER:file.txt is equivalent to CONTAINER:/file.txt as paths are interpreted relative to the root /

unable to understand docker cp command

2 Answers2