Get arduino Serial Number by code?

How can i get my Arduino Serial Number by code? (VID / PID)

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You can check your arduino VIP & PID while he is connected by going to hardware connected to your PC...

I want to know if i can retreive it by code...

The FTDI chip has a serial number. The Arduino does not. While the Arduino is running, it is not talking to the FTDI chip.

Isn't this a Linux/OSX/Windoze question, rather than an Arduino question?

I would start here:

http://www.ftdichip.com/Support/Utilities.htm

They even have a tool to set the serial number of the FTDI chip.

Udo