Screen Command: Set Baud Rate [ Terminal Communication ]

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I need to do router or network switch configuration via a console port such as COM1 (ttyS0 under Linux). How do I use the screen command for a serial terminal emulator network with different baud rates under UNIX or Linux operating systems?

Linux: Configure / Enable Serial Console By Editing GRUB Boot Loader

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How do I configure and enable console redirection in the BIOS? I want see my remote dedicate server boot information and any diagnostic information that is normally printed to the screen. I’ve already enabled serial ports in my server BIOS and wired them up. Now how do I configure and access Linux over a serial console?