You need to use the minicom command, which is a communication program that runs under most unices. Now, you can reboot the server for testing purpose. Then make sure your host's serial port is exposed to your Virtual client. If that doesn't work then you're dead in the water. Since you're on a Mac you can use screen from the command line (since you're using 9600 baud): screen /dev/ttyS0 9600. Open the terminal app and then type the following setserial command: setserial -g /dev/ttyS 0123 If you get an error/warning that reads as Permission denied, try running the command as the root user. The first thing I'd do is make sure you can connect to your external device using the Host OS directly. So please any one could guide on achieving a link (send the data available at ttyUSB0 to ttyAMC0 ) between these two hardware ports. Using setserial to list serial ports and devices Now we installed required package. Make sure UART serial ports /dev/ttyS0 is listed: ttyS0 One of the controllers (ttyUSB0) is programmed such that it sends data serially and another (ttyAMC0) is programmed to receive data serially. The serial port provides the physical connection between the equipment but a communication protocol has to used to ensure a reliable, error-free data path. You need put a getty on a serial line for a terminal: T0:23:respawn:/sbin/getty -L ttyS0 19200 vt100 A serial port connection can be used for inter-processor communication within a system or for communication with different parts of a system. Enables X11 terminal mode: phonebook and serial port are disabled, status line is turned off. Alternatively, you can use dmesg to look for. 2) Step-by-step tutorial how to use serial ports on windows. Alternative you can only use the code as an example. Try ls /dev/tty to see the list of devices. Please take a look here: RS-232 for Linux and Windows 1) Windows Serial Port Programming 2) Using the Serial Ports in Visual C++ 3) Serial Communication in Windows. If you aren't sure which device it is, you can check the list of devices in /dev/ before and after plugging it in to see which one is new. Title Debian GNU/Linux, kernel 2.6.32-5-486 It will have a name like ttys004 or ttyACM4. If you are not using GRUB2 update /boot/grub/menu.lst (grub legacy) with kernel line as follows with console port, and baud rate: # update-grub A Note About Grub Legacy (older version) Next run the following command to generate a grub2 config file /boot/grub/grub.cfg : GRUB_SERIAL_COMMAND="serial -speed=19200 -unit=0 -word=8 -parity=no -stop=1" Linux remote COM port step-by-step guide Step 1: Using terminal emulators (like PuTTY), launch a console session Step 2: Select Serial as the connection type Step 3: Alter the Serial line to match the COM port that was listed earlier Please note: It’s normal for console speeds to reach 9600. GRUB_CMDLINE_LINUX='console=tty0 console=ttyS0,19200n8' For testing purpose, I’m going to set baud rate to 19200 and terminal type to vt100. dev/ttyS0 (COM1) is detected and working serial console under Linux. dev/ttyS3, UART: unknown, Port: 0x02e8, IRQ: 3 dev/ttyS2, UART: unknown, Port: 0x03e8, IRQ: 4 dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3 You can list your working serial port under Linux as follows:
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