[After ubuntu]windows reload, restore grub boot

A few days ago reloading the Windows,window will automatically erase the grub boot during the reload process, and now offers a feasible simplest and safest way to restore the Grub boot scenario:

Get ready:

Ubuntu14.  (U disk or CD-ROM available)

1, insert a USB flash drive or CD-ROM, enter the BIOS change boot mode, set the appropriate starting mode.

2. Choose trial Ubuntu,ctrl+alt+t to bring up terminal. First Enter root mode:

sudo su root

3, list the disk information, find the Linux partition number Sdax and remember.

# fdisk-l

4. Mount the hard disk partition where Linux resides

# Mount/dev/sdax

5. Installing Grub

# Grub-install--ROOT-DIRECTORY=/MNT/DEV/SDA

6. Restart

# reboot

Start the computer again and you will see the familiar grub interface.

[After ubuntu]windows reload, restore grub boot