How to resolve when the Docker daemon is not running?

If the Docker daemon is not started, you can try the following steps to resolve the issue:

1. Check if Docker is already installed by running the command “docker version.” If the version information for Docker is displayed, it means Docker is already installed, otherwise Docker needs to be installed.
2. Start the Docker daemon by running the command sudo service docker start or sudo systemctl start docker in the terminal.
3. Check the status of the Docker daemon by running the command sudo service docker status or sudo systemctl status docker. If it shows active or running status, the Docker daemon has started. Otherwise, further troubleshooting is needed.
4. Check the log files: Review the Docker daemon’s log files, typically located in either /var/log/docker.log or /var/log/syslog, to see if there are any error messages and troubleshoot accordingly.
5. Check the configuration file of the Docker daemon: The configuration file of the Docker daemon is usually located at /etc/docker/daemon.json or /etc/default/docker, make sure the configuration file is correct and error-free.
6. Reinstall Docker: If the above methods do not resolve the issue, you can try reinstalling Docker. You can refer to the official Docker documentation or related tutorials for specific steps.

If the issue persists, it is suggested to search the Docker community forum or seek help from Docker official support, providing detailed error information and log files for better understanding and resolution of the problem.