dpkg -r --force-all zfs-initramfs zfs zfs-dkms libzfs2 libzpool2 libuutil1 libnvpair1 spl spl-dkms
dpkg -P --force-all zfs-initramfs zfs zfs-dkms libzfs2 libzpool2 libuutil1 libnvpair1 spl spl-dkms

#dpkg -r grub-common grub-pc grub-pc-bin grub2-common