grub rescue commands linux
set boot=(hd0,msdos6)
set prefix=(hd0,msdos6)/boot/grub
insmod normal
normal
grub rescue> ls
(hd0), (hd0,msdos5),(hd0,msdos6),(hd0,msdos7),(hd0,msdos8)
So use ls to find the boot folder. Eg:
grub rescue> ls (hd0,msdos5)
no file system found
grub rescue> ls (hd0,msdos6)
ext4: file system