How do you run a command inside a specific container in a running pod?

How do you run a command inside a specific container in a running pod?

• A. kubectl exec -it <pod_name> -c <container_name> -- <command>
• B. kubectl run -it <pod_name> -c <container_name> -- <command>
• C. kubectl attach -it <pod_name> -c <container_name> -- <command>
• D. docker exec -it <pod_name> -c <container_name> -- <command>

Answer: (A)

Running a command inside a specific container in a running pod is done with kubectl exec. This command is designed to execute arbitrary commands inside a container of a pod. The -it flags give you an interactive terminal, which is handy for running shells or debugging interactively. When a pod has more than one container, you must specify which container to target with -c <container_name>; the -- separates kubectl options from the command you want to run inside that container. For example, kubectl exec -it my-pod -c my-container -- bash opens an interactive shell inside the container named my-container within the pod. If there’s only one container, you can omit the container flag. This approach lets you operate inside the container’s namespace and filesystem without creating new pods or attaching to the main process. The other options don’t fit as well. kubectl run creates a new pod rather than executing a command in an existing one. kubectl attach attaches to a running container’s main process and isn’t suited for starting an arbitrary new command inside a specific container. docker exec would operate at the Docker daemon level and isn’t the standard way to interact with containers inside a Kubernetes pod.

Running a command inside a specific container in a running pod is done with kubectl exec. This command is designed to execute arbitrary commands inside a container of a pod. The -it flags give you an interactive terminal, which is handy for running shells or debugging interactively. When a pod has more than one container, you must specify which container to target with -c ; the -- separates kubectl options from the command you want to run inside that container. For example, kubectl exec -it my-pod -c my-container -- bash opens an interactive shell inside the container named my-container within the pod. If there’s only one container, you can omit the container flag. This approach lets you operate inside the container’s namespace and filesystem without creating new pods or attaching to the main process.

The other options don’t fit as well. kubectl run creates a new pod rather than executing a command in an existing one. kubectl attach attaches to a running container’s main process and isn’t suited for starting an arbitrary new command inside a specific container. docker exec would operate at the Docker daemon level and isn’t the standard way to interact with containers inside a Kubernetes pod.