All inovex classes asume that you are inside of the Minikube VM. In order to be able to execute kubectl in Minikube we need to install kubectl and make the admin configuration available for the current user docker:
$ curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.11.3/bin/linux/amd64/kubectl
$ chmod +x kubectl
$ sudo mv kubectl /bin
$ export KUBECONFIG=/etc/kubernetes/admin.conf
$ sudo chown docker:docker /etc/kubernetes/admin.conf
$ kubectl cluster-info