X13/fedora_chroot.md

Find root partition

sudo lsblk -f

Enter

• --bind makes the contents accessible in both locations
• -t defines the filesystem type.

sudo mount /dev/nvme0n1p5 /mnt
sudo mount /dev/nvme0n1p1 /mnt/boot/efi
sudo mount --bind /dev  /mnt/dev
sudo mount -t proc /proc /mnt/proc
sudo mount -t sysfs /sys /mnt/sys
sudo mount -t tmpfs tmpfs /mnt/run
sudo mount --bind /etc/resolv.conf /mnt/etc/resolv.conf
sudo chroot /mnt

Info

efi vars

In order to successfully use efibootmgr the EFI variables filesystem must be accessible.

mount | grep efivars                                                          # check rw EFI vars
mount -o remount,rw -t efivarfs efivarfs /sys/firmware/efi/efivars            # make rw if ro

Boot entries

The path of the EFI image to boot must use \ (backslash) instead of / (forward slash)

# List
efibootmgr

# Add
efibootmgr --create --disk /dev/nvme0n1 --part 1 -L Fedora -l \EFI\fedora\grubx64.efi  

# Order
efibootmgr -o 0000,0001,001C,001D,001E,001F,0020,0021,0022,0023,0024,0025

# Show
efibootmgr | grep Fedora
# Boot0002* Fedora	HD(1,GPT,a90b01c2-def6-3d28,0x800,0x82000)/\EFI\fedora\grubx64.efi

# Delete
efibootmgr -b -0 -B

Grub

lsblk -f -p
dnf reinstall shim-* grub2-*
grub2-mkconfig -o /boot/grub2/

Exit

exit
umount /mnt/dev
umount /mnt/proc
umount /mnt/sys
umount /mnt/run
umount /mnt