To better understand what I need: In systemsettings (KDE), in icon theme module, after I change the icon theme, I click apply. I need to know which command line I run to do the same when I click apply button. It is qbus related?
The command to reload the KDE configuration is:
But I can not test it with the icon theme, because you have not mentioned where exactly is the icon theme config located and it's not so obvious to me.