Boot Failure – How to Install Boot-Repair Tool in Ubuntu Live Disc

bootboot failureboot-repair

When the bootloader (GRUB) is broken, I cannot access neither Ubuntu nor Windows.

I heard that an easy solution to fix this is to use the Boot-Repair tool from an Ubuntu liveCD (or liveUSB).

What are the steps to do this?

Best Answer

Insert or connect the Ubuntu live media (DVD or USB).
Find out how to boot your computer from removable media.

Note that there is a difference between booting of older computers (BIOS/MBR) and newer ones designed for Windows 8 and later releases (UEFI/GPT).

Reboot the computer from live media and choose Try Ubuntu when asked.
Connect to the internet, then open a terminal with Ctrl+Alt+t, paste the following commands and run them by pressing Enter:
```
sudo apt install software-properties-common; \
sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) universe"; \
sudo add-apt-repository -y ppa:yannubuntu/boot-repair; \
sudo apt-get update; \
sudo apt-get install -y boot-repair && boot-repair
```
Note: You copy and run them all at once. If you want to run them individually just remove the trailing "; \".

That's it, the Boot-Repair window will appear!

What is a terminal and how do I open and use it?

Related Solutions

Ubuntu – Unable to install boot-repair

If your are using an older version of the ubuntu live cd, you might need to change the package source. (I had this problem with the Natty (11.04) live cd.)

Start Synaptic, and in the menu go to Settings -> Repositories. Go to the "Other Software" tab, and select the line http://ppa.launchpad.net/yannubuntu/boot-repair/u... main and then click on the Edit button down below.
In the new window that pops up change the distribution: field to "quantal" (without quotes).
Repeat steps 1 and 2, except this time select http://ppa.launchpad.net/yannubuntu/boot-repair/u... (Source Code) , and then close the window.
Now, either click the reload button in synaptic, or enter into the terminal

sudo apt-get update

sudo apt-get install boot-repair

That's it! Boot Repair is now installed.

Dual Boot – Fix Grub and Ubuntu Disappeared After Windows Update

Windows 10 Anniversary Update, and I understand that Windows 10 Creators Update is the same, both can delete Linux partitions for no particular reason. It's not fully understood what factors trigger this action, however it might be related to MBR formatted disks.

Your sda4 is an extended partition that currently contains sda5 swap partition, and also held the previous Ubuntu partition, presumably sda6... which was located between blocks 253681662 and 484151295.

You can try using testdisk to recover your partition.

Boot to a Ubuntu Live DVD/USB, and in the terminal type:

sudo apt-get update

sudo apt-get install testdisk

sudo testdisk

See http://www.cgsecurity.org/wiki/TestDisk_Step_By_Step for help on how to use this tool.

Boot Failure – How to Install Boot-Repair Tool in Ubuntu Live Disc

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