After deleting old linux partitions in order to free space on hard disk I got an error from grub
error: no such partition
and then I see a
grub rescue> prompt.
After googling around I found that in order to boot normally I have to type following commands
set prefix=(hd0,msdos5)/boot/grub set root=(hd0,msdos5) insmod /boot/grub/linux.mod linux /vmlinuz root=/dev/sda5 ro initrd /initrd.img boot
Here is the boot info summary report created by Boot-Repair.
However, on each reboot I have to type this again. How can I tell to grub once and forever what configuration file to use.