debian 12 live grub-install:error:/boot/efi doesn't look like an EFI partition
debian 12 live grub-install:error:/boot/efi doesn't look like an EFI partition
The `grub-install` error "`/boot/efi` doesn't look like an EFI partition" on Debian 12 Live typically indicates an issue with the EFI System Partition (ESP) setup. This critical partition, usually 100-500MB, must be formatted as FAT32 and have the "boot" or "esp" flag set. Common causes include not creating an ESP at all during manual partitioning, formatting it with an incorrect filesystem, or failing to mount it properly. When installing from a live environment, ensure your root partition is mounted to `/mnt`, then create the directory `/mnt/boot/efi`, and crucially, mount your designated FAT32 ESP (e.g., `/dev/sda1`) into `/mnt/boot/efi` before running `grub-install` (often within a `chroot` environment). Also, verify your live USB was booted in UEFI mode, not Legacy/BIOS, as this dictates the type of GRUB installation. Double-check partition types and mount points using `lsblk` and `mount` commands to diagnose and rectify the issue.
--------------
Video link: • debian 12 live grub-install:error:/boot/ef...
Channel link: / @heyinsights
Have questions or thoughts? Leave a comment below. Thank you! 😃