If you are unable to boot into RebornOS, this guide will show you how to repair your bootloader using a live ISO.
If you are booted in UEFI mode, when you run the command
ls -ld /sys/firmware/efi, you will see an output like:
$ ls -ld /sys/firmware/efi drwxr-xr-x 5 root root 0 Dec 10 09:52 /sys/firmware/efi/
If you are booted in Legacy mode, when you run the command above, you will see an output like:
$ ls -ld /sys/firmware/efi ls: cannot access /sys/firmware/efi: No such file or directory
Follow the instructions on this page to chroot into your locally installed RebornOS.
After chrooting, please keep the same terminal window open to perform the below steps.
Based on whether you are booted in UEFI or Legacy mode, you can run the below commands:
sudo grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=RebornOS --recheck
sudo grub-install --target=i386-pc --bootloader-id=RebornOS --recheck
sudo grub-mkconfig -o /boot/grub/grub.cfg
If the above
grub-mkconfig steps run successfully, it is safe to reboot!