After the dual-system is re-installed, it will be restored to boot xp, win7, and ubuntu

After the dual-system is re-installed, it will be restored to boot xp, win7, and ubuntu

This article consists of three steps for a single hard disk host.

Step 1:

Use liveCD or USB flash drive to guide the computer into ubuntu. It is best to ensure that the system versions of the two are the same.

Choose System> Administration> Disk Utility to view the ubuntu root Partition Number, for example,/dev/sda6.

[If it is independently attached to the boot partition, remember the Partition Number of the boot partition]

Call up the terminal by pressing CTRL + ALT + T,

Run the following command:

sudo -i

mount /dev/sda6 /mnt

Write down the result of the following command:

uname -r

Run the following command:

grub-install --root-directory=/mnt /dev/sda

Restart your computer.

Step 2:

If it is Ubuntu, the black screen shell input interface may appear after the system is restarted:

sh:grub>

Run the following command to view the partition information and check the Partition Number of the boot instance:

ls -l

Execute the command again based on the result.

sh:grub> root (hd0, 6)

Note: The above 6 is displayed based on the actual situation.

Run the following command:

sh:grub> linux /boot/vmlinuz-2.6.35-22-generic root=/dev/sda6

Note: 2.6.35-22-generic is the execution result of the uname-r mentioned above.

Run the following command:

sh:grub> initrd /boot/inttrd.img-2.6.35-22-generic

Run the following command to enter the system:

sh:grub> boot

If the system is a ubuntu-10.10, you can see the boot menu before reinstalling the system at the time of restart.

Select ubuntu to start.

Step 3:

Call up the terminal by pressing CTRL + ALT + T,

Run the following command:

sudo update-grub2

If it is a ubunt-9.10 system, continue executing the following command:

sudo grub-install /dev/sda

At this point, the repair is completed.

jason@ubuntu:~$ sudo update-grub[sudo] password for jason: Generating grub.cfg ...Found linux image: /boot/vmlinuz-2.6.35-22-genericFound initrd image: /boot/initrd.img-2.6.35-22-genericFound memtest86+ image: /boot/memtest86+.binFound Windows 7 (loader) on /dev/sda1done