lrwxrwxrwx 1 root root 32 Dec  3 19:33 /initrd.img.old -> boot/initrd.img-4.4.0-51-generic
lrwxrwxrwx 1 root root 29 Dec  2 22:38 /vmlinuz.old -> boot/vmlinuz-4.4.0-51-generic