amar pc te ubuntu 10.04 ar kubuntu 10.04 dutoi ase. ami jayga baranor jonno kubuntur drive ta format diya disi. akhon pc ar open hoy na. screen e lekha thake: error: unknown file system grub rescue> amar kase ubuntu 10.04 er cd nai. obosso addar customised dvd ase. ami ki amar hard disk nirapod e pabo? akn ki korbo? mobile diye mail korsi. help me plz.....