You are diagnosing an issue in a GKE cluster where a new sidecar container should have been added to every Pod. To verify which namespaces actually contain the updated Pods, you want to display a list of all Pods running across every namespace from your workstation, where you are already authenticated to the cluster. Which single command accomplishes this goal most efficiently?
Using kubectl, the flag --all-namespaces (short form -A) tells the client to query every namespace rather than the default namespace. The command "kubectl get pods -A" therefore prints a consolidated table of all Pods in the cluster regardless of namespace, letting you quickly see where the sidecar is present. The other commands are incorrect: specifying --namespace="*" or -n all is not valid syntax; "kubectl get all -n kube-system" only shows resources in the kube-system namespace; and "kubectl get pods --all" is not a supported flag, so it would return an error.
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What is the purpose of namespaces in Kubernetes?
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What is a sidecar container in Kubernetes?
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Why use the '-A' flag in kubectl commands?
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What is a namespace in Kubernetes?
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What is a sidecar container?
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How does the `kubectl get pods -A` command work?
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