Managing Docker Containers: Detached Mode, Listing, Stopping, Starting, and Naming

`--detach` or `-d` for short. Docker will start your container the same as before but this time will detach from the container and return you to the terminal prompt. ```console $ docker run -d -p 8080:8080 docker-gs-ping d75e61fcad1e0c0eca69a3f767be6ba28a66625ce4dc42201a8a323e8313c14e ``` Docker started your container in the background and printed the container ID on the terminal. Again, make sure that your container is running. Run the same `curl` command: ```console $ curl http://localhost:8080/ Hello, Docker! <3 ``` ## List containers Since you ran your container in the background, how do you know if your container is running or what other containers are running on your machine? Well, to see a list of containers running on your machine, run `docker ps`. This is similar to how the ps command is used to see a list of processes on a Linux machine. ```console $ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES d75e61fcad1e docker-gs-ping "/docker-gs-ping" 41 seconds ago Up 40 seconds 0.0.0.0:8080->8080/tcp inspiring_ishizaka ``` The `ps` command tells you a bunch of stuff about your running containers. You can see the container ID, the image running inside the container, the command that was used to start the container, when it was created, the status, ports that are exposed, and the names of the container. You are probably wondering where the name of your container is coming from. Since you didn’t provide a name for the container when you started it, Docker generated a random name. You'll fix this in a minute but first you need to stop the container. To stop the container, run the `docker stop` command, passing the container's name or ID. ```console $ docker stop inspiring_ishizaka inspiring_ishizaka ``` Now rerun the `docker ps` command to see a list of running containers. ```console $ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES ``` ## Stop, start, and name containers Docker containers can be started, stopped and restarted. When you stop a container, it's not removed but the status is changed to stopped and the process inside of the container is stopped. When you ran the `docker ps` command, the default output is to only show running containers. If you pass the `--all` or `-a` for short, you will see all containers on your system, including stopped containers and running containers. ```console $ docker ps --all CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES d75e61fcad1e docker-gs-ping "/docker-gs-ping" About a minute ago Exited (2) 23 seconds ago inspiring_ishizaka f65dbbb9a548 docker-gs-ping "/docker-gs-ping" 3 minutes ago Exited (2) 2 minutes ago wizardly_joliot aade1bf3d330 docker-gs-ping "/docker-gs-ping" 3 minutes ago Exited (2) 3 minutes ago magical_carson 52d5ce3c15f0 docker-gs-ping "/docker-gs-ping" 9 minutes ago Exited (2) 3 minutes ago gifted_mestorf ``` If you’ve been following along, you should see several containers listed. These are containers that you started and stopped but haven't removed yet. Restart the container that you have just stopped. Locate the name of the container and replace the name of the container in the following `restart` command:

This section explains how to run Docker containers in detached mode, list running containers using `docker ps`, and manage container lifecycles (stop, start, restart). It also covers how to name containers for easier management, and how to view all containers, including stopped ones, using `docker ps --all`.