by DevynCJohnson. Dconf is a settings database used in Gnome3 and similar systems (such as Unity and XFCE). Dconf is the predecessor to Gconf which was used in Gnome2. Dconf acts like the registry used on Windows systems. Understanding this system may help users figure out how to make various changes and fixes to their system. Gconf was used in Gnome2. It used an XML database.