Regeneration Dragon Recovery partition post repair boot or Debian Linux repair boot Trilogy

First reference

Sudo-i
mkdir  /mnt
Mount  /dev/sda1  /mnt
Grub-install  --force  --no-floppy  --root-directory=/mnt  /DEV/SDA

Then under GRUB or refer to the content below.

LiveCD under the Casper Directory of Vmlinuz and Initrd.lz, put it in the root directory of a random partition of Windows, and then start on the menu by pressing C, then grub> under input
Grub>set root= (hd0,x)----> This is the partition where Vmlinuz and Initrd.lz are located, such as the first partition is (hd0,1), to be confused with Grub>search-s-f-n/vmlinuz
Grub>linux/vmlinuz root=/dev/sday---->sday is your/partition number
Grub>initrd/initrd.lz
Grub>boot

After entering the system
Update-grub

Regeneration Dragon Recovery partition post repair boot or Debian Linux repair boot Trilogy