I have installed a paravirtual image of Debian8 on XenServer, and I am adding a script to create a template of that vm. I added the script with the "systemctl enable script" command at startup. In the scritp I use the dialog that is already installed.
When I convert vm to template and create a new vm, in the syslog log I get the following error as if the script had started at the wrong time of the boot:
initial-conf[407]: Error opening terminal: unknown.
initial-conf[407]: cannot open tty-output
initial-conf[407]: Error opening terminal: unknown.