Hi,

Yes, the issue here is most likely to be zenity, as you say. zenity is a utility for displaying dialog boxes in an X Windows graphical environment. If you're running this server headless (i.e. you have no monitor connected and are interacting with it purely over a serial link) then zenity isn't going to work. Your best bet would be to switch out zenity for another text-only utility such as dialog, which can display interactive full-screen text mode dialog boxes to query the user for information. That should work in any terminal session regardless of whether the script was being started in an xterm running in X11, on a text mode virtual console, or over a serial link. If you check out the man page for dialog it'll give you a description of how it works, but it shouldn't be too hard to re-work your script to use one rather than the other.