Wineserver is a daemon process that provides roughly the same services to Wine that the Windows kernel provides on Windows.

Wineserver launches automatically when starting a wine application. In some cases, however, it can be useful to start wineserver explicitly.

For example, you have sessions on the same installation where you run only non-GUI batch jobs and have no DISPLAY set, and you also have sessions where you run Wine/OpenROAD GUI applications. In this case, you can first run wineserver as persistent once from the GUI sessions: