For Linux with X Windows server support, starts dbmlsync in shell mode if a usable display is not available.
dbmlsync -ui ...
When this option is used, dbmlsync tries to start with X Windows. If this fails, it starts in shell mode.
When -ui is specified, dbmlsync attempts to find a usable display. If it cannot find one, for example because the X Windows server isn't running, then dbmlsync starts in shell mode.