How to Restart a Docker Container

To restart a Docker container, you can use the `docker restart` command. This command stops and then starts the specified container. Here's a step-by-step guide on how to restart a Docker container, along with command examples:

List Running Docker Containers

As the first step, you need to identify the container you want to restart. To list all running containers, you can use the docker ps command:

docker ps

This will display a list of running containers, including their Container ID, names, and other information.

Select the Container to be restarted

Identify the container you want to restart from the list. Note down its Container ID or name.

Restart the Docker Container

Use the docker restart command to restart the container. You can specify the container either by its name or its Container ID:

Using Container Name

docker restart container_name

Using Container ID

docker restart container_id

Replace `container_name` with the actual name of your container or `container_id` with the Container ID.

After running the docker restart command, you can check the status of the container to confirm that it has been restarted. You can use the docker ps command for this purpose:

docker ps

You should see your container in the list with a new status indicating that it's running again.

Examples of restarting a Docker Container

Here's an example of restarting a container named "nginx_app" using its name:

docker restart nginx_app

And here's an example using a Container ID:

docker restart 8frsdewa31gs

Replace "nginx_app" and "8frsdewa31gs" with the actual name or Container ID of your container.

Remember that when you restart a container, it will stop and then start again, which means it may lose any changes made to its filesystem unless you've configured it as persistent data volume. If data persistence is required, you should use Docker volumes or bind mounts to ensure that data is not lost during restarts.

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