gurb

$ sudo vim /boot/grub/menu.lst

title           Ubuntu 8.04.1, kernel 2.6.24-21-generic
root            (hd0,5)
kernel          /boot/vmlinuz-2.6.24-21-generic root=UUID=3d5dd6c0-bbd2-4ddf-9b71-1c7b78e8de3b ro quiet splash 

console=tty0 console=ttyS0,38400
initrd          /boot/initrd.img-2.6.24-21-generic
quiet	
		

tty6

$ sudo vim /etc/event.d/tty6

respawn
#exec /sbin/getty 38400 tty6
exec /sbin/getty -L /dev/ttyS0 38400 vt100	
		

other terminal: VT100, VT220, VT320, VT420

securetty

$ cat /etc/securetty
# for people with serial port consoles
ttyS0