starting console on ttyS0

[Tomoki Taniguchi]

I have been trying to get serial console login working on feisty
server (not desktop).
I have been following the directions on the following documentation.
https://help.ubuntu.com/community/SerialConsoleHowto

I have gotten it to redirect the console output
so that i can watch the start up message
but i can't get a login message to start up.

according to the doc i am supposed to edit "/etc/inittab"
but inittab did not exist.  so i created one and added the
"T0:2345:respawn:/sbin/getty -L 115200 ttyS0 vt100"
line to the file and saved it

as instructed in the doc i ran
>$ sudo /sbin/telinit q
checked the console .... nothing
i rebooted the machine just to be sure...
same thing, just see the boot message and no login prompt.

i do a
>$ ps -auxwww |grep tty
i get
<snip>
Warning: bad ps syntax, perhaps a bogus '-'? See http://procps.sf.net/faq.html
root      3580  0.0  0.0   1668   512 tty4     Ss+  10:03   0:00
/sbin/getty 38400 tty4
root      3581  0.0  0.0   1664   508 tty5     Ss+  10:03   0:00
/sbin/getty 38400 tty5
root      3584  0.0  0.0   1664   508 tty2     Ss+  10:03   0:00
/sbin/getty 38400 tty2
root      3594  0.0  0.0   1664   508 tty3     Ss+  10:03   0:00
/sbin/getty 38400 tty3
root      3597  0.0  0.0   1668   508 tty1     Ss+  10:03   0:00
/sbin/getty 38400 tty1
root      3598  0.0  0.0   1668   508 tty6     Ss+  10:03   0:00
/sbin/getty 38400 tty6
tomoki    4080  0.0  0.0   2740   760 pts/1    R+   10:27   0:00 grep tty
<snip>
doesn't seem to be a getty running on ttyS0.

next i manually ran the getty command
>$ sudo /sbin/getty -L 115200 ttyS0 vt100
i finially got a login prompt on the serial console.
I can login and do stuff...
i do a
>$ ps -auxwww |grep tty
again and i get the exact same thing as before no getty listed for ttyS0
but i am definitely got a console running on serial right now.

anyway.  how do i get it so i can get a respawning getty on ttyS0?

TIA,
Tomoki