debian/apt.conf.ubuntu

   1 APT
   2 {
   3   NeverAutoRemove
   4   {
   5         "^linux-image.*";
   6         "^linux-restricted-modules.*";
   7   };
   8
   9   Install-Recommends-Section "metapackages";
  10   Never-MarkAuto-Section "metapackages";
  11 };