How can you verify if the container is running using the command line?

To verify if a Docker container is running using the command line, you can use the docker ps command. This command lists all currently running containers.

Steps to Check Running Containers:

Open your terminal.
Run the following command:
```
docker ps
```

Output Explanation:

The output will display a list of running containers, including columns for:
- CONTAINER ID: A unique identifier for each container.
- IMAGE: The image from which the container was created.
- COMMAND: The command that is being executed in the container.
- CREATED: When the container was created.
- STATUS: The current status of the container (e.g., "Up 5 minutes").
- PORTS: Any ports that are exposed.
- NAMES: The name of the container.

Check for a Specific Container:

If you want to check if a specific container (e.g., named my_container) is running, you can use:

docker ps -f name=my_container

If the container is running, it will appear in the output. If it’s not running, there will be no output.

Additional Command:

To see all containers, including those that are stopped, use:

docker ps -a

This command will show all containers, regardless of their state, allowing you to verify if a container exists even if it is not currently running.