How to copy the files in docker

There are three ways to copy files from a Docker container: Use the Docker cp command: docker cp [Options] Use the docker exec command: docker exec container-id cat /my-file > /my-path/on-host Mount volume: docker run -v :

How to copy files from a Docker container

There are three main ways to copy files from a Docker container:

Method 1: Use the Docker cp command

The Docker cp command allows you to copy files or directories between containers and hosts. Use the following syntax:

 <code>docker cp [选项]  </code>

For example, to copy /my-file in the container to the current directory on the host:

 <code>docker cp container-id:/my-file .</code>

Method 2: Use the docker exec command

The docker exec command allows you to execute commands within a container. You can use it to copy files, for example:

 <code>docker exec container-id cat /my-file > /my-path/on-host</code>

This will copy /my-file in the container to /my-path/on-host on the host.

Method 3: Mount the volume

You can mount the host directory into a container as a volume. This way, you can access files in the container directly on the host. Use the following syntax:

 <code>docker run -v : </code>

For example, to mount /my-path on the host to /my-app in the container:

 <code>docker run -v /my-path:/my-app my-image</code>

You can then access files in the container directly from the host, just as they are on the host.

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