SerialConsole

grub.conf
default=0
timeout=10
serial --unit=0 --speed=9600 --word=8 --parity=no --stop=1 terminal serial
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
title Red Hat Linux (2.4.20-8)
        root (hd0,0)
        kernel /boot/vmlinuz-2.4.20-8 ro root=LABEL=/ console=tty0 console=ttyS0,9600n8
        initrd /boot/initrd-2.4.20-8.img
/etc/inittab
co:2345:respawn:/sbin/agetty -h -t 60 ttyS0 9600 vt102
/etc/securetty  ttyS0