diff --git a/docs/05-kubernetes-configuration-files.md b/docs/05-kubernetes-configuration-files.md
index 7275597..45111c0 100644
--- a/docs/05-kubernetes-configuration-files.md
+++ b/docs/05-kubernetes-configuration-files.md
@@ -27,7 +27,7 @@ When generating kubeconfig files for Kubelets the client certificate matching th
 Generate a kubeconfig file for each worker node:
 
 ```
-for instance in worker-0 worker-1 worker-2; do
+for instance in worker-{0..2}; do
   kubectl config set-cluster kubernetes-the-hard-way \
     --certificate-authority=ca.pem \
     --embed-certs=true \
@@ -198,7 +198,7 @@ admin.kubeconfig
 Copy the appropriate `kubelet` and `kube-proxy` kubeconfig files to each worker instance:
 
 ```
-for instance in worker-0 worker-1 worker-2; do
+for instance in worker-{0..2}; do
   gcloud compute scp ${instance}.kubeconfig kube-proxy.kubeconfig ${instance}:~/
 done
 ```
@@ -206,7 +206,7 @@ done
 Copy the appropriate `kube-controller-manager` and `kube-scheduler` kubeconfig files to each controller instance:
 
 ```
-for instance in controller-0 controller-1 controller-2; do
+for instance in controller-{0..2}; do
   gcloud compute scp admin.kubeconfig kube-controller-manager.kubeconfig kube-scheduler.kubeconfig ${instance}:~/
 done
 ```