This is the second PR for cleaning up old redirection entries that are
more than 4 years old. The `docs/user-guide` directory was removed on
in June, 2018. It should be okay to remove these entries since those old
bookmarks are no longer useful anyway.
kubectl run starting from 1.18 is creating only Pods and there is no option to
create any other resource. Users should be using kubectl create
commands instead. This update the documentation in all those places
where kubectl create should be used instead or changes description to
reflect the situation.