Edit: /etc/apt/apt.conf.d/01autoremove (630B)
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";
};
};