Thanks for the good answer. On Thu, 2008-01-31 at 15:05 +0100, Olivier Robert wrote: > Hi, > > I would check for established VNC connections this way: > > netstat -tape | grep ESTABLISHED | grep Xvnc > > As for warning connected users. If you see there is an established vnc > session on port 5902, you could simply do: > > export DISPLAY=:2.0; xmessage -center -timeout 60 -file shutdown.txt > > /dev/null 2>&1 How can I determine what the user responds, is there errorlevels or anything like that? Hundred years ago I was making a lot of advanced BAT-files in msdos, but have not done much of those things in Linux yet. I could or maybe should find out reading man-pages, but have already asked. :) What is the reason for doing ' > /dev/null 2>&1' > You could create a list of established connections, translate it to > active displays (5902 -> 2.0 | 5903 -> 3.0 ...) and send out a > message. > > Hope it helps > Olivier > It helps a lot, Thanks Henning Larsen