I have a fedora system which, for the sake of brevity, got borked.
I have a bootable partition where I have moved grub.cfg because it does not boot.
The system has one hard disk : /dev/sda ; I wish to install BIOS grub2 boot on /dev/sda booting to /sda3 where I have a rootfs and /boot on the same partition.
Seems trivial situation. How can I boot from a live image , like a fed31 install iso and repair this without going through an entire installation process to a bogus partition just to get it to install grub and create a valid /boot/grub2/grub.cfg ?
Many thanks for how to achieve that .