docker.service: Failed with result 'exit-code'.

The error message "docker.service: Failed with result 'exit-code'" indicates that the Docker service failed to start or stopped unexpectedly. There could be several reasons for this error, such as misconfiguration of Docker, insufficient resources, or conflicts with other services.

To troubleshoot this issue, you can try the following steps:

1. Check the Docker logs for any error messages using the command `sudo journalctl -u docker`. This will give you more information about the cause of the failure.

2. Restart the Docker service using the command `sudo systemctl restart docker` and check if the issue is resolved.

3. Check if there are any conflicting services running on the same port as Docker. You can use the command `sudo netstat -tulpn | grep LISTEN` to check for any conflicts.

4. Check if there are any resource constraints on your system, such as low disk space or memory. Docker requires a certain amount of resources to run properly.

5. Try reinstalling Docker and its dependencies to ensure that all components are properly installed and configured.

I hope this helps you in resolving the issue. Let me know if you have any further questions.