kubectl-config: add page (#13223)

pages/common/kubectl-config.md

@@ -0,0 +1,30 @@
+# kubectl config
+
+> Manage Kubernetes configuration (kubeconfig) files for accessing clusters via `kubectl` or the Kubernetes API.
+> By default, the Kubernetes will get its configuration from `${HOME}/.kube/config`.
+> See also: `kubectx`, `kubens`.
+> More information: <https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#config>.
+
+- Get all contexts in the default kubeconfig file:
+
+`kubectl config get-contexts`
+
+- Get all clusters/contexts/users in a custom kubeconfig file:
+
+`kubectl config {{get-clusters|get-contexts|get-users}} --kubeconfig {{path/to/kubeconfig.yaml}}`
+
+- Get the current context:
+
+`kubectl config current-context`
+
+- Switch to another context:
+
+`kubectl config {{use|use-context}} {{context_name}}`
+
+- Delete clusters/contexts/users:
+
+`kubectl config {{delete-cluster|delete-context|delete-user}} {{cluster|context|user}}`
+
+- Permanently add custom kubeconfig files:
+
+`export KUBECONFIG="{{$HOME.kube/config:path/to/custom/kubeconfig.yaml}}" kubectl config get-contexts`