How to make a Docker container restart back up and running again

Docker is a containerization technology that has received widespread attention in daily software development and server management. Using Docker to build applications and manage servers can make development and deployment more efficient, but sometimes when using Docker, your containers may stop working, rendering your applications inaccessible. What should you do if this happens to you? This article will explain how to make a Docker container restart back to normal operation.

1. Confirm whether the container is running

To restart the Docker container, you first need to confirm whether the container has stopped running. You can list running Docker containers with the following command:

docker ps

If you see that the containers are running, then you can skip this part and go directly to the next step. If you find that the container has stopped running, you need to restart it.

2. Restart the Docker container

To restart the Docker container, run the following command:

docker restart <container_id></container_id>

In the above command, "" is the ID of the container you want to restart. This command will restart the specified container and make it run again.

If you don’t have the IDs of your containers, you can get the IDs of all running containers with the following command:

docker ps -q

The above command will return the IDs of all running Docker containers. Once you have the ID of the container, you can restart the container using the first command.

3. Terminal for running containers

If you need a terminal to run a Docker container (for example, you need to make changes or upgrades to the contents of the container), you can use The following command:

docker exec -it <container_id> /bin/bash</container_id>

In the above command, "" is the ID of the container you want to access. This command will launch a bash terminal in the container via an interactive terminal.

4. Use Docker Compose to manage multiple containers

If you are using Docker Compose to manage multiple containers, you can restart the entire group using the following command:

docker-compose restart

The above command will restart all containers defined in the docker-compose.yml file.

Summary

In this article, we introduced how to restart a container using Docker. If you find that your container is not running properly, follow the steps above to restart the container to get your application running again.

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