[oshug] Arduino help needed

I need some help from one of you Arduino gurus.

I want to talk to the Arduino serial interface from a Fedora Linux system. I know how to do the Arduino side, using Serial.available, Serial.read, Serial.write etc.

My problem is how to talk from the Linux end. All the examples I see are Windows based and use Thierry Schneider's Serial C++ Library for Win32. What do I use as the Linux equivalent?

It's not as simple as just writing the the Linux device (in this case /dev/bus/usb/004/081). I suspect I need something rather cleverer, but I don't know what it is.

Any help much appreciated. I'm trying to help a youngster set up an Arduino based face tracker, driven by OpenCV face detection on the Linux box.

Thanks,

Jeremy