What are the reasons Docker cp works differently to Unix cp? [closed]
The docker docs on cp explain this:
- SRC_PATH specifies a directory
- DEST_PATH does not exist
- DEST_PATH is created as a directory and the contents of the source directory are copied into this directory
- DEST_PATH exists and is a file
- Error condition: cannot copy a directory to a file
- DEST_PATH exists and is a directory
- SRC_PATH does not end with /.
- the source directory is copied into this directory
- SRC_PATH does end with /.
- the content of the source directory is copied into this directory
So either DEST_PATH does not exist or it does and your docker cp command is actually docker cp child-dir/ uncle-dir (with the trailing slash).