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hello all i am asking once again for a little help. here is my question

i am trying to run a x11vnc the thing is i want it to be launched with a service command but not at startup and as well i want it running inside a screen session when it does start. i also want it to be able to view the root screen for the greeter. i am running ubuntu 13.04 with lightdm is there any way i can make this happen. the command i am trying to run is

    screen -S "x11vnc" -d -m &&
    screen -r "x11vnc" -X "/usr/bin/x11vnc -once -rfbauth /home/passwd -xkb -rfbport
    5900 -auth /var/run/lightdm/root/:0 -display :0 -bg" 

it would also need to use the root user for the greeter display so using the lightdm session is there anyway to make it run something like

   ME=`whoami`
   as_user() {
   if [ $ME == $USERNAME ] ; then
   bash -c "$1"
   else
   su - $USERNAME -c "$1"
   fi
   }

where username = root

if anyone can help me figure this out please let me know. and thanks for your time.

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