You should start from the very basic things..

Kubernetes concept page is your starting point.

The Kubernetes Master is a collection of three processes that run on a single node in your cluster, which is designated as the master node. Those processes are: kube-apiserver, kube-controller-manager and kube-scheduler. Each individual non-master node in your cluster runs two processes: kubelet, which communicates with the Kubernetes Master. kube-proxy, a network proxy which reflects Kubernetes networking services on each node.

Regarding you question in comment: read Organizing Cluster Access Using kubeconfig Files. Make sure you have kubeconfig file in the right place..