Recovering Grub from accidental deletion
Every once in a while we may run into a situation where we accidentally delete the contents of MBR which stops grub bootloader from loading the menu and booting the system. This can happen when windows is installed on top of a *nix OS with grub installed in which case Windows deletes the MBR content and replaces it with it’s own. Here is a fix.
Download and burn Knoppix (or any live-cd for that matter) into a cd or dvd.
Boot the system from live cd/dvd.
Once boot is completed, type sudo su - to become a superuser. Type grub (enter). This will result in a grub prompt. type find /boot/grub/stage1 which will output a partition with stage1 file. In our example below it’s (hd0,1) which can be /dev/sda2 or /dev/hda2. Note the partition number because we will need this in the next step. Type root followed by the partition from above output. Finally type setup followed by the part before comma. In our example this is (hd0). This is the device block we will be installing grub loader to.
Note: This fix will work if the *nix partition is intact and hasn’t been corrupted.
An example scenario: # grub grub> find /boot/grub/stage1 (hd0,1) grub> root (hd0,1) grub> setup (hd0) grub> quit # reboot
Voila!
♡2018 by ghimire. Copying is an act of love. Please copy.
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