Nameserver on second server

We are planning to purchase another server in the near future. Can anyone point me to a tutorial on how to setup a second nameserver on the second server? Is there a special config to make sure both servers work together? And if someone was hosting on the server and they had their domain name pointed to ns1 and ns2 and ns1 was down it should then automatically go to ns2 correct?

Thanks
Silly

 

 

 

 

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