Open Terminal
Enter: sudo fdisk -l
Search ID=83,and remeber the sd[number],like sda3，If exist multiple 83, please verify which is / 。
switch root
- Enter:
mkdir /media/tmp - Mount / mount to the new directory:
mount /dev/sda5 /media/tmpIf the previous system /boot is mounted separately,you need to find /boot partition like sda6，then:
mount /dev/sda6 media/tmp/boot
install grub
`grub-install --root-directory=/media/tmp /dev/sda`
If you see Installation finished，no error occured. successful.
