Boot-repair in ubuntu, how does it fix booting?
Googled and found boot-repair:#-Link-Snipped-#
But I didn't get how it works, it fixed the problem for me, found Ubuntu loader, Ubuntu recovery mode, Windows 7 loader twice, removed one Windows 7 loader later from live usb.
But how did boot-repair fix the booting problem.
What is Grub loader why does it needs to be repaired or it gets broken?