Converting the /dev/ttyUSB to com ports in linux

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http://superuser.com – I have some software which runs on windows. I installed wine and ran it in linux. It works fine but the issue is it communicates with a serial port. Therefore the only option I can choose are com1,com2,.... But my device on the linux machine is actually located at the /dev/ttyUSBn location. How do I use the above software in linux ubuntu? I have tried ln -s /dev/ttyUSBn COM1 in the ~/.wine/dosdevices/. it does not appear to work. (HowTos)