Install libgconf2-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libgconf2-doc
Description:
GNOME configuration database system (API reference)
GConf is a configuration database system for storing application preferences. It supports default or mandatory settings set by the administrator, and changes to the database are instantly applied to all running applications. It is written for the GNOME desktop but doesn't require it. . This package contains the API reference for the GConf library.
Homepage: http://projects.gnome.org/gconf/
Version: 3.2.6-4ubuntu1
Section: universe/doc