kc should be kubectl.

README.md

@@ -217,7 +217,7 @@ You can Control-C to terminate the port-forward proxy in the other terminal.
 The guestbook deployment uses "LoadBalancer" service type for guestbook frontend running at 10.105.182.163:80, which means internal pods can find the service endpoint to access guestbook without knowing guestbook pods addresses. To access from outside of the kubernetes cluster network, without expose it to Internet, we can use port-forwarding:
 
 ```console
-$ kc get svc  -l app=guestbook
+$ kubectl get svc  -l app=guestbook
 NAME       TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)   AGE
 frontend   ClusterIP   10.105.182.163   <none>        80/TCP    54m