Docker cp requires exactly 2 arguments.

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Error: docker cp requires exactly 2 arguments.

The error message “docker cp requires exactly 2 arguments” indicates that the docker cp command expects exactly two arguments to be provided. The docker cp command is used to copy files between the Docker host and a running container.

Here is the syntax of the docker cp command:

docker cp SOURCE_PATH CONTAINER:DEST_PATH
docker cp CONTAINER:SOURCE_PATH DEST_PATH

Where:

  • SOURCE_PATH represents the path to the file or directory on the Docker host.
  • CONTAINER is the name or ID of the container.
  • DEST_PATH is the path where the file or directory will be copied inside the container.

Examples:

docker cp /path/to/file.txt container1:/app/file.txt
docker cp container2:/app/logs /path/to/backup/logs

In the first example, we are copying the file file.txt from the Docker host to the path /app/file.txt inside container1.

In the second example, we are copying the directory logs from container2 to the path /path/to/backup/logs on the Docker host.

Make sure to provide the correct number of arguments and verify the source and destination paths and container name/ID to resolve the error.

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