clean up the environment (#16430)

content/en/docs/tasks/administer-cluster/manage-resources/cpu-default-namespace.md

@@ -155,6 +155,14 @@ Here are two of the restrictions that a resource quota imposes on a namespace:
 If a Container does not specify its own CPU limit, it is given the default limit, and then
 it can be allowed to run in a namespace that is restricted by a quota.
 
+## Clean up
+
+Delete your namespace:
+
+```shell
+kubectl delete namespace default-cpu-example
+```
+
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content/en/docs/tasks/administer-cluster/manage-resources/memory-default-namespace.md

@@ -162,6 +162,14 @@ Here are two of the restrictions that a resource quota imposes on a namespace:
 If a Container does not specify its own memory limit, it is given the default limit, and then
 it can be allowed to run in a namespace that is restricted by a quota.
 
+## Clean up
+
+Delete your namespace:
+
+```shell
+kubectl delete namespace default-mem-example
+```
+
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content/en/docs/tasks/configure-pod-container/configure-persistent-volume-storage.md

@@ -160,6 +160,22 @@ hostPath volume:
 
     Hello from Kubernetes storage
 
+## Clean up
+
+Delete the Pod,  the PersistentVolumeClaim and the PersistentVolume:
+
+```shell
+kubectl delete pod task-pv-pod
+kubectl delete pvc task-pv-claim
+kubectl delete pv task-pv-volume
+```
+
+Remove the file:
+
+```shell
+sudo rm -rf /mnt/data
+```
+
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content/en/docs/tasks/configure-pod-container/security-context.md

@@ -353,6 +353,17 @@ label given to all Containers in the Pod as well as the Volumes.
 After you specify an MCS label for a Pod, all Pods with the same label can access the Volume. If you need inter-Pod protection, you must assign a unique MCS label to each Pod.
 {{< /warning >}}
 
+## Clean up
+
+Delete the Pod:
+
+```shell
+kubectl delete pod security-context-demo
+kubectl delete pod security-context-demo-2
+kubectl delete pod security-context-demo-3
+kubectl delete pod security-context-demo-4
+```
+
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