How to extract files from a Docker container?

To extract files from a Docker container, you can follow these steps:

1. Find the container ID where the desired file is located. You can use the following command to list all running containers:
2. list all running containers
3. Use the following command to copy a file from the container to the local file system:
4. Copy file from container to local destination:
   docker cp :
5. To copy the file /app/data.txt from container ID abcd1234 to the local /tmp directory, you can run the following command:
6. Copy the file data.txt from the container with ID abcd1234 to the directory /tmp.
7. This will copy the file /app/data.txt from the container to the /tmp directory on the local machine.

Please note that even if the container has stopped, you can still use the same steps to extract files from a stopped container.