from: https://kubernetes.io/docs/tasks/access-application-cluster/configure-access-multiple-clusters/

cheatsheet.sh

# https://kubernetes.io/docs/reference/kubectl/cheatsheet/#zsh
source <(kubectl completion zsh)  # setup autocomplete in zsh into the current shell
echo "if [ $commands[kubectl] ]; then source <(kubectl completion zsh); fi" >> ~/.zshrc # add autocomplete permanently to your zsh shell

k8s-multiple-cluster.sh

kubectl config --kubeconfig=config-demo view
# apiVersion: v1
# clusters: []
# contexts: []
# current-context: ""
# kind: Config
# preferences: {}
# users: []
kubectl config --kubeconfig=config-demo set-context dev-backend --cluster=development --namespace=backend --user=developer
# Context "dev-backend" created.
kubectl config --kubeconfig=config-demo use-context dev-backend
# Switched to context "dev-backend".

K8s Config docs
https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#config