Add the following to /etc/lilo.conf:
CODE
append = "console=ttyS0,9600n8"


Run Lilo for the changes to take affect.
CODE
lilo


Then add the following to /etc/securetty:
CODE
ttyS0



edit /etc/inittab - Uncomment the line:
CODE
T0:23:respawn:/sbin/getty -L ttyS0 9600 vt100


Reboot

CODE
shutdown -r now



For those who just like to copy and paste:
CODE
echo 'append = "console=ttyS0,9600n8"' >> /etc/lilo.conf

lilo

echo "ttyS0" >> /etc/securetty

echo "T0:23:respawn:/sbin/getty -L ttyS0 9600 vt100" >> /etc/inittab

reboot