Ubuntu: After installing Ubuntu from USB, GRUB2 can't be installed!



Question:

Hello ladies and gentlemen! I installed Ubuntu alongside with Windows 7 using live USB.

It wouldn't let me install GRUB, it says there's a fatal error with the partition chose. I literally chose every single partition yet it didn't work! So I chose not to install a bootloader for the sake of it's not working. Can any one help me on how to install a bootloader, I'm talking from live usb.


Solution:1

your best bet to install grub2 is Boot-Repair tool.

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Boot-Repair is a simple tool to repair frequent boot issues you may encounter in Ubuntu like when you can't boot Ubuntu after installing Windows or another Linux distribution, or when you can't boot Windows after installing Ubuntu, or when GRUB is not displayed anymore, some upgrade breaks GRUB, etc.

How to install?

sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get update  sudo apt-get install -y boot-repair  

How to run?

boot-repair

How to use?

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more info here.


Solution:2

  1. Boot using a live cd of ubuntu.

  2. Open a terminal and run the command

sudo fdisk -l

It lists the complete partition table of the hard disk. In there, identify which partition you have got your linux installed on. You can identify it using the drive size you had allocated for it and looking at the last column of the output which will be ‘extended’ for all of your linux partitions. The partition will most probably be something like /dev/sda5 or something. Remember this partition.

  1. Create a temporary folder in your home directory (Note: You can make the temporary folder anywhere you want. I’m using the home folder just for the sake of explanation). I’m calling it ‘temp’ for now. So that ‘temp’ folder’s path will be /home/ubuntu/temp.

  2. Mount your linux partition there. That is, assuming that you found your linux partition to be /dev/sda5, you mount that at the ‘temp’ folder by doing the following command

sudo mount /dev/sda5 /home/ubuntu/temp

  1. If you want to check whether you have mounted the correct partition, go to your home folder and open temp. You will be in the ‘/’ directory. In there you will find ‘home’, in which your home folder’s name will be there. Once you’ve confirmed you have mounted the correct partition, do step 6.

  2. You have to install grub by showing the system where to read the data from the hard disk at the beginning. Don’t worry, just run the following command

sudo grub-install --root-directory=/home/ubuntu/temp /dev/sda

The ‘/dev/sda’ corresponds to your hard disk name. Replace it by whatever the command ‘sudo fdisk -l’ command showed you.

  1. You’re done. You may restart your system

Source : http://sosaysharis.wordpress.com/2011/06/29/recovering-grub-after-installing-windows-using-ubuntu/


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