Improve host aliases page (#5443)

* Fix confusion code block

* Add more detail command

* Add pod wide output

docs/concepts/services-networking/add-entries-to-pod-etc-hosts-with-host-aliases.md

@@ -15,14 +15,19 @@ Modification not using HostAliases is not suggested because the file is managed
 ## Default Hosts File Content
 
 Lets start an Nginx Pod which is assigned an Pod IP:
-```
+
+```shell
+$ kubectl run nginx --image nginx --generator=run-pod/v1
+pod "nginx" created
+
 $ kubectl get pods --output=wide
 NAME     READY     STATUS    RESTARTS   AGE    IP           NODE
 nginx    1/1       Running   0          13s    10.200.0.4   worker0
 ```
 
 The hosts file content would look like this:
-```
+
+```shell
 $ kubectl exec nginx -- cat /etc/hosts
 # Kubernetes-managed hosts file.
 127.0.0.1	localhost
@@ -42,8 +47,20 @@ In addition to the default boilerplate, we can add additional entries to the hos
 
 {% include code.html language="yaml" file="hostaliases-pod.yaml" ghlink="/docs/concepts/services-networking/hostaliases-pod.yaml" %}
 
-The hosts file content would look like this:
+This Pod can be started with the following commands:
+
+```shell
+$ kubectl apply -f hostaliases-pod.yaml
+pod "hostaliases-pod" created
+
+$ kubectl get pod -a -o=wide
+NAME                           READY     STATUS      RESTARTS   AGE       IP              NODE
+hostaliases-pod                0/1       Completed   0          6s        10.244.135.10   node3
 ```
+
+The hosts file content would look like this:
+
+```shell
 $ kubectl logs hostaliases-pod
 # Kubernetes-managed hosts file.
 127.0.0.1	localhost
@@ -52,7 +69,7 @@ fe00::0	ip6-localnet
 fe00::0	ip6-mcastprefix
 fe00::1	ip6-allnodes
 fe00::2	ip6-allrouters
-10.200.0.4	hostaliases-pod
+10.244.135.10	hostaliases-pod
 127.0.0.1	foo.local
 127.0.0.1	bar.local
 10.1.2.3	foo.remote

docs/concepts/services-networking/hostaliases-pod.yaml

@@ -3,6 +3,7 @@ kind: Pod
 metadata:
   name: hostaliases-pod
 spec:
+  restartPolicy: Never
   hostAliases:
   - ip: "127.0.0.1"
     hostnames: