Gnome Cheat Sheet
From Gentoo Wiki
Create a custom application launcher in GNOME Shell
Create a APP_NAME.desktop (APP_NAME application name) file under /usr/share/applications (or ~/.local/share/applications or directly in ~/Desktop) with the following content:
FILE
APP_NAME.desktop
APP_NAME.desktop file[Desktop Entry] Encoding=UTF-8 Name=APP_NAME Exec=/PATH/TO/APP/EXECUTABLE Icon=/PATH/TO/APP/ICON Type=Application Categories=APPLICATION_CATEGORY_NAME;
For detailed .desktop
specification (eg. list of Registered Categories) see: specifications.freedesktop.org.