Outline
GNU GRUB (GRand Unified Bootloader referred to as "GRUB") from the GNU project is a multi-operating system startup program. GRUB is a multi-start implementation of the specification, which allows the user to have more than one operating system in the computer, and select the operating system you want to run when the computer starts. GRUB on different cores may be used to select the operating system partition, boot parameters can also be used to transfer the cores.
It is a multiple operating system boot manager. For directing different systems, such as windows, linux. When /boot/grub/grub.conf configuration file is missing, or the key to a configuration error, or MBR boot program records destruction may occur "grub>" prompt start the Linux host can not be completed further system startup process. As shown below
Simulation
(1) delete the grub configuration file grub / conf, simulated destruction gurb
(2) repair grub boot menu
Guide rescue mode, image loading system
MBR and repair sector, the need for the image file to boot into emergency mode commands, refer to the process of the last microblogging
Re-establish the load sda partition
Rebuild grub menu configuration file
Exit and restart bash environment
