populate the instructions on installing kubectl in getting-started-guides

docs/user-guide/prereqs.md

@@ -21,11 +21,28 @@ certainly want the docs that go with that version.</h1>
 
 <!-- END MUNGE: UNVERSIONED_WARNING -->
 # Kubernetes User Guide: Managing Applications: Prerequisites
+To deploy and manage applications on Kubernetes, you’ll use the Kubernetes command-line tool, [kubectl](kubectl/kubectl.md). It lets you inspect your cluster resources, create, delete, and update components, and much more. You will use it to look at your new cluster and bring up example apps. 
 
-To deploy and manage applications on Kubernetes, you’ll use the Kubernetes command-line tool, [kubectl](kubectl/kubectl.md). It can be found in the release tar bundle, or can be built from source from github. Ensure that it is executable and in your path.
+##Install kubectl
+You can find it in the [release](https://github.com/GoogleCloudPlatform/kubernetes/releases) tar bundle, under platforms/<os>/<arch>;
+or if you build from source, kubectl should be either under _output/local/bin/<os>/<arch> or _output/dockerized/bin/<os>/<arch>.
 
+Next, make sure the kubectl tool is in your path, assuming you download a release:
+```
+# OS X
+export PATH=<path/to/kubernetes-directory>/platforms/darwin/amd64:$PATH
+
+# Linux
+export PATH=<path/to/kubernetes-directory>/platforms/linux/amd64:$PATH
+```
+
+##Configure kubectl
 In order for kubectl to find and access the Kubernetes cluster, it needs a [kubeconfig file](kubeconfig-file.md), which is created automatically when creating a cluster using kube-up.sh (see the [getting started guides](../../docs/getting-started-guides/) for more about creating clusters). If you need access to a cluster you didn’t create, see the [Sharing Cluster Access document](sharing-clusters.md).
 
+Check that kubectl is properly configured by getting the cluster state:
+```
+$ kubectl cluster-info
+```
 ## What's next?
 
 [Learn how to launch and expose your application.](quick-start.md)