Hi there,
> What Arcgis softwares like Arcgis Enterprise or ArcGIS desktop we need to run GeoPortal
> What Arcgis softwares like Arcgis Enterprise or ArcGIS desktop we need to run ArcGIS HUB
FYI, Esri Geoportal Server and ArcGIS Hub are 2 separate and different product offerings from ArcGIS Enterprise and ArcGIS Desktop. So there are no specific dependencies. Although, it's highly likely that you would use ArcGIS Desktop to create and manage your GIS data and assets for use in Geoportal Server and ArcGIS Hub.
> Is Open data part of Arcgis Hub
Yes, ArcGIS Hub includes Open Data capabilities,
Enable Open Data capabilities—ArcGIS Hub | ArcGIS
Hope this helps,
