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Show the processes running in a Docker container

harmless rootDockerdebian, ubuntu
Adjust the values, the command updates live
root@server
docker top app

Lists the processes in the container as they appear on the host. This also works with minimal images that have no ps. The PID shown is the host PID, so a suspicious process from top can be matched directly to a container.

Note: Docker commands require root or the docker group.

Also searched as

  • docker top processes in container
  • which container is this process
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Related one-liners

All in Docker

Follow Docker container logs live

#docker logs -f --tail 100 app
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Open a shell in a running Docker container

#docker exec -it app sh
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Back up a Docker volume to a tar archive

#docker run --rm -v app_data:/data:ro -v /root/docker-backup:/backup alpine tar czf /backup/app_data.tar.gz -C /data .
cautionDocker

Change the restart policy of a Docker container

#docker update --restart unless-stopped app
cautionDocker

Clean up unused Docker data

#docker system prune
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Copy a file from a Docker container to the host

#docker cp app:/etc/nginx/nginx.conf /root/nginx.conf
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Read first, then run.

The commands on myline.de act directly on servers, files and databases. A wrong path or placeholder can delete data irreversibly or make a server unreachable.

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  • Understand what a command does before running it, and check every placeholder.
  • Make a backup first and, if possible, try it on a test system.
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