Serial Console setup

/boot/grub/menu.lst

serial --unit=0 --speed=115200
terminal --timeout=5 serial console
title Red Hat Enterprise Linux (2.6.32-358.el6.x86_64)
        root (hd0,0)
        kernel /vmlinuz-2.6.32-358.el6.x86_64 ro root=UUID=364ec31d-8027-4aac-ab2c-5daa9dc854b5 rd_NO_LUKS LANG=en_US.UTF-8 rd_NO_MD  KEYTABLE=us SYSFONT=latarcyrheb-sun16 crashkernel=auto console=ttyS0,115200n8 rd_NO_LVM rd_NO_DM
        initrd /initramfs-2.6.32-358.el6.x86_64.img

/etc/securetty
ttyS0

/etc/init/ttyS0.conf
# ttyS0 - agetty
#
# This service maintains a agetty on ttyS0.

stop on runlevel [S016]
start on runlevel [23]

respawn
exec agetty -h -L -w /dev/ttyS0 115200 vt102