How do I find out what serial port I have on my linux redhat system? *
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To find out which serial ports are on your linux system run the following command; the one with the code 16550A is the serial port, this system has only one port.
unixbod:> setserial -g /dev/ttyS* /dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4 /dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3 /dev/ttyS2, UART: unknown, Port: 0x03e8, IRQ: 4 /dev/ttyS3, UART: unknown, Port: 0x02e8, IRQ: 3 /dev/ttyS4, UART: unknown, Port: 0x0000, IRQ: 0 /dev/ttyS5, UART: unknown, Port: 0x0000, IRQ: 0 /dev/ttyS6, UART: unknown, Port: 0x0000, IRQ: 0 /dev/ttyS7, UART: unknown, Port: 0x0000, IRQ: 0
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