The Directory Server runs as the process or service on your machine.The server manages the directory databases and responds to client requests.Your services would have stayed online if you had at least two DNS servers for domain.As i told DNS must always be distributed and most of the times it has a master slave relationship.
This post is helpful for configuring emacs to automatically update the “Serial” in bind zone databases.Imagine a situation where you have only one DNS server, for your publicly available service in one location. That’s the reason our parents kept a name for us and not a number J.If something happens on that server and due to some reason it goes down or becomes unreachable, then all your publicly available services will be down, till the server comes back online (it’s not correct to say that your services will be down, but it will be correct to say that people will not be able to reach the IP address that runs your website or services. Let’s take an example with the help of a domain called (this is a reserved domain name by IANA, for showing illustrations).For the latest updates please refer to the online version of these release notes available at: NOTE: An upgrade of Oracle Linux from a beta release is not supported.Further, an in-place upgrade between major versions of Oracle Linux is not supported.
Red hat Enterprise Linux is a commercial subscription based product.