You know that feeling. You turn on your computer and it attempts to load but nothing happens. It just hangs. This tutorial will teach you how to restore the grub bootloader so that everything works again.
Ok the first thing we need is a Linux live CD, any distribution will do. Insert the Live CD and allow it to load. Once loaded you need to open a terminal. We need to find out where your linux partition is installed so type sudo fdisk -l. You will get a response similiar to;
Device Boot Start End Blocks Id System
/dev/sda1 1 60801 48838 4001 83 Linux
Make a note of this as we will use this later.
Next we need to make a directory on the desktop and mount the partition where Linux is installed
so type sudo mkdir realroot. Then sudo mount /dev/sda1 realroot. You should now see your partition mounted on the desktop.
Last thing is to re-install grub into the partition. We do this by typing sudo grub-install –root-directory=realroot /dev/sda.
And that is it. Make sure you type sudo where stated above as you need to perform these commands as root. Close down the system and reboot.
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Just Install the grub bootloader from the bootable dvd/cd which you have used during installation. And do not partition. Keep it as it is. Then restart.
It will take hardly 5 – 10 mins depending on your computer’s speed.
Fixing grub issues are a great topic – thanks for adding your how-to.
It might be worth noting that grub-install is a legacy grub command, used by Red Hat and Suse, whereas a different repair process is needed for distributions that use the newer Grub2 (Ubuntu, etc.)
I’ve also found the SuperGrub and SuperGrub2 live CDs to be handy in repairing grub issues.
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