How to rename Sharepoint database server

In some cases User Profile service is in “starting” mode but not started after a while getting “stopped” . one of the cause this situation is Sharepoint server name is using an ip address instead of using netbios name. You can check if from Central Administration -> Servers in farm section.

How can we change the ip address of SQL server to netbios name? Answer is simple use stsadm.
Run the following command to rename the server from IP address to netbios name sucessfully:

Stsadm -o renameserver -oldservername <ipaddress> -newservername <netbios name of the sql server>