The application administrator, who doesn't have the cluster-admin role available, can install a control plane after the necessary objects requiring cluster-admin in the previous steps have been created. Let's take a look:

1. To install the control plane, run the following command:

$ linkerd install control-plane | kubectl apply -f -

The preceding command will install Linkerd control plane objects such as ConfigMap, Deployment, Secret, Service, and so on using the less privileged account credentials.  

2. To validate the installation of control-plane, run the following command:

$ linkerd check

This overview was done to provide reasoning for using cluster-role and other user-based roles. Next, we'll explain the steps for setting up the Ingress controller, which is required to enable Linkerd dashboard access from outside the Kubernetes cluster.