Ubuntu cannot be started after it is upgraded to 12.04 online: nosuchpartition

After the instance is started, go to the grub system selection page, But no matter which startup Item is selected, an error is always reported ...... "Error: nosuchpartition ". Solution: Put the system disk (I used the Ubuntu11.10 disk) into the optical drive, restart the computer, enter the boot interface of the disc, and select trial -- "TryUbuntu ". If the system's preferred boot item is not started from the "Optical Drive", set the boot item (boot from the optical drive, hard drive, USB boot, NET boot, etc ). I use a Toshiba notebook.

After the instance is started, go to the grub system selection page, But no matter which startup Item is selected, an error is always reported ...... "Error: no such partition ".

Solution: Put the system disk (I am using a Ubuntu 11.10 disk) into the optical drive, restart the computer, enter the boot interface of the disc, and select Try Ubuntu ".

If the system's preferred boot item is not started from the "Optical Drive", set the boot item (boot from the optical drive, hard drive, USB boot, NET boot, etc ). I use a Toshiba notebook. After the boot, press F12 to set it.

In the trial version of Ubuntu, start the Terminal (Terminal) and enter the system administrator mode:

Sudo-I

Load the partition where the Ubuntu system is located (I use sda6) to the/mnt directory. If you are not sure, start Disk Utility to view the partition (you can also use the command ):

Mount/dev/sda6/mnt

Reinstall grub on the sda6 partition:

Grub-install -- boot-directory =/mnt/boot/dev/sda6

(If an error is reported and interrupted, add the forec option: grub-install -- force -- boot-directory =/mnt/boot/dev/sda6)

After grub is installed, restart your computer.

For more information about Ubuntu, see Ubuntu special page http://www.linuxidc.com/topicnews.aspx? Tid = 2