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[radu@radu-pc ~]$ sudo grub-install /dev/sda
[sudo] password for radu:
Installing for i386-pc platform.
Installation finished. No error reported.
[radu@radu-pc ~]$ sudo update-grub
Generating grub configuration file ...
Found background: /usr/share/grub/background.png
Found Intel Microcode image
Found linux image: /boot/vmlinuz-4.14-x86_64
Found initrd image: /boot/initramfs-4.14-x86_64.img
Found initrd fallback image: /boot/initramfs-4.14-x86_64-fallback.img
Found linux image: /boot/vmlinuz-4.9-x86_64
Found initrd image: /boot/initramfs-4.9-x86_64.img
Found initrd fallback image: /boot/initramfs-4.9-x86_64-fallback.img
Found memtest86+ image: /boot/memtest86+/memtest.bin
done
[radu@radu-pc ~]$ sudo rm /boot/grub/grubenv
[radu@radu-pc ~]$ sudo grub-editenv /boot/grub/grubenv create
[radu@radu-pc ~]$ sudo update-grub
Generating grub configuration file ...
Found background: /usr/share/grub/background.png
Found Intel Microcode image
Found linux image: /boot/vmlinuz-4.14-x86_64
Found initrd image: /boot/initramfs-4.14-x86_64.img
Found initrd fallback image: /boot/initramfs-4.14-x86_64-fallback.img
Found linux image: /boot/vmlinuz-4.9-x86_64
Found initrd image: /boot/initramfs-4.9-x86_64.img
Found initrd fallback image: /boot/initramfs-4.9-x86_64-fallback.img
Found memtest86+ image: /boot/memtest86+/memtest.bin
done