How to install the Boot-Repair tool in an Ubuntu live disc?

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?

1. Insert or connect the Ubuntu live media (DVD or USB).



2. 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.

   
   
   
   

   




3. 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!

   
   
   

   

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