apt-get download gnome-shell-common=3.28.4-0ubuntu18.04.1 gnome-control-center-faces=1:3.28.2-0ubuntu0.18.04.4 gnome-shell=3.28.4-0ubuntu18.04.1
E: Version '3.28.4-0ubuntu18.04.1' for 'gnome-shell-common' was not found
E: Version '1:3.28.2-0ubuntu0.18.04.4' for 'gnome-control-center-faces' was not found
E: Version '3.28.4-0ubuntu18.04.1' for 'gnome-shell' was not found