My Arduino Diecimila is connected to a USB port. The green LED is lit and the board can be seen with an lsusb. When I start the Ardino IDE 0010 everything seems to be okay. I can open an example "Button" and verify the compile. When I try to upload the program to the Diecimila board I get the error "Serial port 'COM1' not found. Did you select the right one from the Tools > Serial Port menu?"
When I try to select Tools -> Serial Port no serial ports appear (the machine is an IBM T43 laptop and does not have any serial ports). What I think I need to do is link, or otherwise substitute, a USB port for a serial port, e.g. COM1.
Any ideas?
An "ln -s /dev/ttyUSB0 COM1" did the job. Now /dev/ttyUSB0 shows up as an option under Tools -> Serial Port And, an upload worked!