I was facing grub rescue issue in linux. However i was able to login in the OS with below tutorial https://www.lisenet.com/2014/grub2-rescue-mode-error-unknown-filesystem/.
I have to upgrade grub to fix the problem.
I am getting error
grub-install: error: cannot find EFI directory
I have filesystem as below
`sda4, sda5, sda6 for EFI system, linux swap, linux file system respectively.
I am not much experienced using mount or other commands.
grub-install /dev/sda grub-install: error: cannot find EFI directory.