====== Namespaces ======


  kubectl describe ns default

  $ cat namespace.yaml
  apiVersion: v1
  kind: Namespace
  metadata:
    name: main
    labels:
      name: main

  $ kubectl get ns
  NAME          STATUS    AGE
  default       Active    22h
  kube-public   Active    22h
  kube-system   Active    22h

  $ kubectl apply -f namespace.yaml

  $ kubectl get ns
  NAME          STATUS    AGE
  default       Active    22h
  kube-public   Active    22h
  kube-system   Active    22h
  main          Active    3h

  $ kubectl get namespaces --show-labels
  $ kubectl describe ns main
  $ kubectl describe ns default

  $ kubectl config set-context main --namespace=main --cluster=${NAME} --user=${NAME}
  Context "main" modified.
  
  $ kubectl config get-contexts
  CURRENT   NAME                          CLUSTER                       AUTHINFO                      NAMESPACE
            default                       cluster
  *         main                          cluster                       cluster                       main

  $ kubectl config use-context main


https://vitalflux.com/kubernetes-create-delete-namespaces-namespaces/