gnome-manual-duplex – A utility that adds manual duplex to the print menu
gnome-manual-duplex is a utility that adds manual duplex to the "Print" menu.
Install gnome-manual-duplex in Ubuntu
You can download .deb package from here once you downloaded the .deb package install by double clicking on it or run the following command from your terminal
sudo dpkg -i gnome-manual-duplex_0.19_all.deb