If you aren't using X11, and if your primary user interface is via a web browser, create a script called /root/msg:
#!/bin/sh
stty noecho
while true
do
clear
for i in 1 2 3 4 5 6 7 8 9
do
echo
done
echo " This virtual machine should only be accessed via"
echo " a web browser directed to the following URL:"
echo
echo -n " "
ifconfig eth0|sed -n -e 's=inet addr:=http://=' -e 's=Bcast.*==p'
read
done
Next, in /etc/inittab, remove the standard getty for console 1 and replace it with this:
1:2345:respawn:/root/msg >/dev/tty1 </dev/tty1
Lastly, "kill -HUP 1" to get init to re-read /etc/inittab, then use "ps" to get the PID of the current getty and kill it.
Ta-da! Instant user-friendliness!
