15 lines
No EOL
824 B
Markdown
15 lines
No EOL
824 B
Markdown
repair grub after installing windows
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https://www.youtube.com/watch?v=Zr9oyWjD6IA
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https://askubuntu.com/questions/88384/how-can-i-repair-grub-how-to-get-ubuntu-back-after-installing-windows
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1. use ` sudo fdisk -l` to find efi and main linux partition
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2. Mount linux partition to mnt. `sudo mount /dev/sdxy .mnt` and then mount efi partition to `/mnt/boot/efi`. `sudo mount /dev/sdab .mnt/boot/efi`.
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3. chroot to /mnt to access linux partition and then `update-grub`. Though most probably have to do this step too `grub-install /dev/sda` sda here but it have to be the drive where efi is installed
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4. finally exit and reboot
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and if installed distri is arch based then
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while in chroot do following
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`grub-mkconfig -o /boot/grub/grub.cfg`
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then
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`grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=GRUB` |