How to restore grub bootloader in Ubuntu 14.04?

Question

GRUB

Good day!
I can not solve the problem of loading Ubuntu in priority, after installing Windows 8.1 in an adjacent partition, it is loaded by default on reboot. When I turn on the laptop through the Boot Options, I can select the Ubuntu item, just like if I hold Shift + Restart in Win8 - there is an Ubuntu item, it loads correctly. But I would like to load Ubuntu always by default, I tried this help.ubuntu.ru/wiki/%D0%B2%D0%BE%D1%81%D1%81%D1%82... and boot Ubuntu into recovery mode, choosing item "restore bootloader", no effect. What to do in this situation?

Answer 1

In LiveCD

sudo mount /dev/sdxN /mnt
sudo grub-install --root-directory=/mnt /dev/sdx
sudo update-grub --output=/mnt/boot/grub/grub.cfg
sudo reboot

x - device, N - section.