How to restore Ubuntu boot after dual system reload WIN7/XP--Reprint

How to restore Ubuntu boot after reloading Win7

After reloading the system, Ubuntu boot on the boot screen is missing and goes directly to the newly installed window system. Here's how to restore the Ubuntu boot method:

1) Prepare an Ubuntu system installation disk;

2) Install the Ubuntu system installation disk into the CD-ROM drive, restart the computer, enter the BIOS, the boot is set to the CD-ROM (cd/rom) boot mode;

3) Then save the settings to exit, wait a moment to enter the Ubuntu installation interface, there are two options

1. Try the Ubuntu system on the CD

2. Install the Ubuntu system on the computer

Select "Try Ubuntu system on this disc" and enter the Ubuntu system to open the terminal (shortcut key combination is ctrl+alt+t);

4) Enter Sudo-i under terminal (Get Administrator privileges)

5) under Terminal input fdisk-l (is lowercase letter ' l ', view disk list characters)

A message similar to the following will appear:

disk/dev/sda:320.1 GB, 320072933376 bytes
255 heads, Sectors/track, 38913 cylinders
Units = Cylinders of 16065 * 8225280 bytes
Disk identifier:0x70f7ab9c

Device Boot Start End Blocks Id System
/DEV/SDA1 1 1627 13060096 Unknown
Partition 1 does not end on cylinder boundary.
/DEV/SDA2 * 1627 1639102400 7 Hpfs/ntfs
Partition 2 does not end on cylinder boundary.
/dev/sda3 1639 8166 52429859 7 Hpfs/ntfs
/DEV/SDA4 8167 38913 246975277+ 5 Extended
/dev/sda5 8167 32385 194539082+ 7 hpfs/ntfs
/dev/sda6 32386 38788 51432066-up Linux
/dev/sda7 38789 38913 1004031, Linux Swap/solaris

Then find the letter ID 83, according to the information shown above, when the fashion Ubuntu is installed in Sda6 this partition.

6) in terminal input mount/dev/sda*/mnt

(* represents the partition on which the Ubuntu system is located, that is, the previous step shows the partition number with ID 83 in the result, as shown above in Sda6 this partition,

So the input is mount/dev/sda6/mnt.

Note: There is a space behind mount, there is a space behind the SDA6, the two spaces must not be missed, otherwise it will be an error.

7) After the previous step is finished, continue entering Grub-install--ROOT-DIRECTORY=/MNT/DEV/SDA in the terminal

Wait for a while, if the Installationfinished,no error reported indicates success

(Note: There is no space between Grub-install,--root Front has a space,--root front is two '-',/mnt behind a space)

8) to this, Ubuntu boot basic recovery, restart the computer, you can see the familiar Ubuntu boot interface, enter the Ubuntu system, open the terminal input

sudo update-grub

Wait a moment to display the following information:

Generating grub.cfg ...
Found Linux Image:/boot/vmlinuz-2.6.31-20-generic
Found initrd Image:/boot/initrd.img-2.6.31-20-generic
Found memtest86+ Image:/boot/memtest86+.bin
Found Windows Vista (loader) on/dev/sda1
Found Windows 7 (loader) on/dev/sda2
Done

The resumption of work was all done.