HOWTO : can't access tty; job control turned off

#/etc/fstab

/dev/root       /       auto    defaults,errors=continue        0 0
proc            /proc   proc    defaults    0   0
none            /tmp    tmpfs   defaults    0   0

#/etc/init.d/rcS

mount -a
mount -n /proc
mount -n -o remount,rw /

ln -s /dev/tts/0 /dev/ttyS0
ln -s /dev/vc/0 /dev/tty0

#/etc/inittab

::sysinit:-/etc/init.d/rcS
#::askfirst:-/bin/sh
#::respawn:-/bin/sh
::respawn:/sbin/getty -L ttyS0 9600 vt100
::ctrlaltdel:/bin/umount -a -r