/etc/xdg/menus/debian-menu.menu -> /var/lib/menu-xdg/menus/debian-menu.menu 看到这儿的 /var/lib/menu-xdg/menus/debian-menu.menu 里是 <Menu> <AppDir>/var/lib/menu-xdg/applications/menu-xdg</AppDir> <DirectoryDir>/var/lib/menu-xdg/desktop-directories/menu-xdg</DirectoryDir> /var/lib/menu-xdg/applications/menu-xdg 和 /var/lib/menu-xdg/desktop-directories/menu-xdg 下都是一样的内容... 怎么回事 ？