I'd like to know how I can open the default file manager with the focus on a given file.
I'd like to do that on KDE (Konqueror/Dolphin) and GNOME (Nautilus) and if possible on other environments.

kde-open does not have any argument to do this. and if i use the file as the url it will open that file.
even konqueror and dolphin do not have any option for this.
But there has to be some way to to this.