Filename: //etc//apt//apt.conf.d/01autoremove

APT
{
  NeverAutoRemove
  {
	"^firmware-linux.*";
	"^linux-firmware$";
	"^linux-image-[a-z0-9]*$";
	"^linux-image-[a-z0-9]*-[a-z0-9]*$";
  };

  VersionedKernelPackages
  {
	# kernels
	"linux-.*";
	"kfreebsd-.*";
	"gnumach-.*";
	# (out-of-tree) modules
	".*-modules";
	".*-kernel";
  };

  Never-MarkAuto-Sections
  {
	"metapackages";
	"contrib/metapackages";
	"non-free/metapackages";
	"restricted/metapackages";
	"universe/metapackages";
	"multiverse/metapackages";
  };

  Move-Autobit-Sections
  {
	"oldlibs";
	"contrib/oldlibs";
	"non-free/oldlibs";
	"restricted/oldlibs";
	"universe/oldlibs";
	"multiverse/oldlibs";
  };
};

./Ninja\.