By default, Docker keeps log files in a directory called /var/lib/docker/containers on the host machine. Each container has its own directory in this directory, and the logs for that container are stored in a file named <container_id>-json.log.
For example, if you have a container with the ID 1234567890abcdef, the logs for that container would be stored in the file /var/lib/docker/containers/1234567890abcdef-json.log.
You can use the docker logs command to view the logs for a specific container. For example, to view the logs for the container with the ID 1234567890abcdef, you would use the following command:
docker logs 1234567890abcdef
You can also use the docker ps command to list all of the running containers and their IDs.
Here are some additional things to note about Docker log files:
- The log files are stored in JSON format.
- The log files can be quite large, so it is important to rotate them regularly.
- You can configure Docker to send the logs to a remote server or to a cloud storage service.
Please note that Docker’s logging behavior and options might have evolved since my last update. I recommend checking the original How-To Geek article or the official Docker documentation for the most up-to-date information on Docker log files and configuration settings.