I am following up the examples which are part of istio documentation at IstioSetup I am able to install istio as in the documentation but when I try to run istioctl command example istioctl kube-inject -f samples/bookinfo/kube/bookinfo.yaml I get an error as follows

**Error: kubernetes configuration file "/home/ubuntu/.kube/config" does not exist**

I have installed the kubernetes cluster using kismatic install and have installed it multiple using different version at the end installing Kubernetes 1.9 and with and without ingress . I have tried the same in clustered version and non clustered version giving same error.