I have an application that runs under Redhat 7.2 that expects to see a serial port at /dev/tty4 with characteristics 9600,N,1,1. Through my own ignorance or perhaps through failure of the PCI serial card (Dolphin 2-port PCI card) the application doesn’t appear to notice the serial port. I know very little about linux and how to turn this back on or test to see of the port has failed. Does anyone have a way (or can VNC to my computer) to see what’s going on? Many thanks in advance.