root@lubuntu:~# sudo su
root@lubuntu:~# cd
root@lubuntu:~# umount -lf /mnt &>/dev/null
root@lubuntu:~# mount /dev/sdb1 /mnt
root@lubuntu:~# cp /etc/resolv.conf /mnt/etc/resolv.conf
root@lubuntu:~# mount --bind /dev /mnt/dev
root@lubuntu:~# mount --bind /proc /mnt/proc
root@lubuntu:~# mount --bind /sys /mnt/sys
root@lubuntu:~# chroot /mnt
root@lubuntu:/# mount -t devpts none /dev/pts
root@lubuntu:/# apt-get --reinstall install grub-common
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 211 not upgraded.
Need to get 1,680 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://ru.archive.ubuntu.com/ubuntu/ trusty-updates/main grub-common amd64 2.02~beta2-9ubuntu1 [1,680 kB]
Fetched 1,680 kB in 0s (2,019 kB/s)
(Reading database ... 105348 files and directories currently installed.)
Preparing to unpack .../grub-common_2.02~beta2-9ubuntu1_amd64.deb ...
Unpacking grub-common (2.02~beta2-9ubuntu1) over (2.02~beta2-9ubuntu1) ...
Processing triggers for ureadahead (0.100.0-16) ...
Processing triggers for man-db (2.6.7.1-1) ...
Setting up grub-common (2.02~beta2-9ubuntu1) ...
root@lubuntu:/#