% apt-cache policy lightdm | grep -i install Installed: 0.9.2-0ubuntu4 % apt-cache policy lightdm-gtk-greeter | grep -i installed Installed: 0.9.2-0ubuntu4
% apt-cache policy lightdm | grep -i install
Installed: 0.9.2-0ubuntu4
% apt-cache policy lightdm-gtk-greeter | grep -i installed
Installed: 0.9.2-0ubuntu4