SQL server 2012 on Windows server 2012 I know this is a basic question. but I can't find any answer on the internet. I know SQL server 2012 is running on Windows 2012 server but when I look at the start page (it has IE, Control panel, task manager and etc). but how do I start SQL server 2012 that is running on this server?
Start->Run (Windows R if you prefer) SQLServerManager11.msc 

That is the snapin for managing your SQL Server Instances.



Unless of course you mean SQL Server Management Studio which by default would be installed at "C:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\ManagementStudio\Ssms.exe"