Output Linux Console to Serial
From Suntel Communications knowledgebase
Add the following line to the kernel parameters in the GRUB boot sequence
console=tty0 console=ttyS0,9600n8
Note: You must match the com port baud speed here with the one that you set in the servers BIOS. The default speed on most servers is 9600 but we usually increase it to 115200 to speed things up.
