raidwas@server:~$ sudo update-grub
Generating grub configuration file ...
Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.
Found linux image: /boot/vmlinuz-4.4.0-59-generic
Found initrd image: /boot/initrd.img-4.4.0-59-generic
Found linux image: /boot/vmlinuz-4.4.0-57-generic
Found initrd image: /boot/initrd.img-4.4.0-57-generic
Found linux image: /boot/vmlinuz-4.4.0-53-generic
Found initrd image: /boot/initrd.img-4.4.0-53-generic
Found linux image: /boot/vmlinuz-4.4.0-51-generic
Found initrd image: /boot/initrd.img-4.4.0-51-generic
Found linux image: /boot/vmlinuz-4.4.0-47-generic
Found initrd image: /boot/initrd.img-4.4.0-47-generic
Adding boot menu entry for EFI firmware configuration
done