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.