http://www.howtoforge.com/setting_up_a_serial_console

Edit: /boot/grub/menu.lst

--- snip ---
# password topsecret
serial --unit=0 --speed=9600 --word=8 --parity=no --stop=1
terminal --timeout=10 serial console
--- snip ---

--- snip ---
title           Ubuntu 8.10, kernel 2.6.27-7-server
uuid            b25570ad-6302-4637-a897-d7a4cebf4a7f
kernel          /boot/vmlinuz-2.6.27-7-server root=UUID=b25570ad-6302-4637-a897-d7a4cebf4a7f ro quiet splash console=tty0 console=ttyS0,34800n8
initrd          /boot/initrd.img-2.6.27-7-server
--- snip ---

Edit: /etc/event.d/ttyS0

--- snip ---
# ttyS0 - getty
#
# This service maintains a getty on tty1 from the point the system is
# started until it is shut down again.

start on stopped rc2
start on stopped rc3
start on stopped rc4
start on stopped rc5

stop on runlevel 0
stop on runlevel 1
stop on runlevel 6

respawn
exec /sbin/getty -L ttyS0 38400 vt100
--- snip ----

Damit hätten wir dann eine Serielle Console auf der WAVE:-)

WAVE-274#virtual-blade 1 session
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.

Boot from (hd0,0) ext3   b25570ad-6302-4637-a897-d7a4cebf4a7f
Starting up ...
Loading, please wait...
Couldnt get a file descriptor referring to the console
19+0 records in
19+0 records out
kinit: name_to_dev_t(/dev/sda5) = dev(8,5)
kinit: trying to resume from /dev/sda5

--- output omited ---

Ubuntu 8.10 ubuntu ttyS0

ubuntu login: admin
Password:
Last login: Mon Dec  8 13:34:36 CET 2008 on ttyS0
Linux ubuntu 2.6.27-7-server #1 SMP Fri Oct 24 07:37:55 UTC 2008 i686

The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

To access official Ubuntu documentation, please visit:
http://help.ubuntu.com/

System information as of Mon Dec  8 13:40:01 CET 2008

System load: 0.02             Memory usage: 5%   Processes:       46
Usage of /:  5.8% of 9.38GB   Swap usage:   0%   Users logged in: 0

Graph this data and manage this system at https://landscape.canonical.com/

admin@ubuntu:~$

So dann nur noch ein Backup und dann go baby go.

admin@ubuntu:~$ sudo su -
root@ubuntu:~# halt

Broadcast message from admin@ubuntu
      (/dev/ttyS0) at 13:43 ...

The system is going  * Saving the system clock
* Stopping firewall: ufw...                                             [ OK ]
* Asking all remaining processes to terminate...                        [ OK ]
* All processes ended within 2 seconds....                              [ OK ]
* Deconfiguring network interfaces...                                   [ OK ]
* Deactivating swap...                                                  [ OK ]
* Unmounting local filesystems...                                       [ OK ]
* Will now halt
halt: Unable to iterate IDE devices: No such file or directory
[  522.482593] Power down.
Connection closed by foreign host.

WAVE-274#copy virtual-blade 1 disk 1 ftp 192.168.200.5 / WAVE-274-LX.vb
Enter username for remote ftp server: ftp
Enter password for remote ftp server:

2460112690 bytes total
WAVE-274#