I faced a strange problem i went to college in the morning and when i came back in the evening my laptop was booting up to grub 2 command shell. And the reason was not known to me then i started looking for solutions. To my surprise there were no specific solutions available for Debian, However i thought i should try maybe they can work. The solutions were correct however somehow confusing so i thought i should write a blog about that so that if someone goes through same problem he can refer this blog.