localhost.localdomain rc.local[15230]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to ‘/tmp/runtime-root’
localhost.localdomain rc.local[15230]: qt.qpa.screen: QXcbConnection: Could not connect to display
localhost.localdomain rc.local[15230]: Could not connect to any X display.
请各位大侠指教解决的方法！