-https://storage.googleapis.com/kubernetes-release/release/v1.15.2/bin/linux/amd64/kubectl
-https://storage.googleapis.com/kubernetes-release/release/v1.15.2/bin/darwin/amd64/kubectl
+https://storage.googleapis.com/kubernetes-release/release/v1.15.11/bin/linux/amd64/kubectl
+https://storage.googleapis.com/kubernetes-release/release/v1.15.11/bin/darwin/amd64/kubectl
+
+You only need to install kubectl where you'll launch Kubernetes command. This
+can be any machines of the Kubernetes cluster or a machine that has IP access
+to the APIs.
+Usually, we use the first controller as it has also access to internal
+Kubernetes services, which can be convenient.