/efi/ is the default mount of EFI System Partition. Take a look at https://0pointer.net/blog/linux-boot-partitions.html on why mount ESP on /boot/efi should be discouraged.
On 2023-10-04 6:27 p.m., Felix Miata <mrmazda@xxxxxxxxxxxxx> wrote:
# inxi -S
System:
Host: ab560 Kernel: 6.4.16-200.fc38.x86_64 arch: x86_64 bits: 64
Console: pty pts/1 Distro: Fedora release 39 (Thirty Nine)
# rpm -qa | grep grub
# grep -w /efi /proc/mounts
systemd-1 /efi autofs rw,relatime,fd=52,pgrp=1,timeout=120,minproto=5,maxproto=5,direct,pipe_ino=24799 0 0
/dev/nvme0n1p1 /efi vfat rw,nosuid,nodev,noexec,relatime,nosymfollow,fmask=0077,dmask=0077,codepage=437,iocharset=ascii,shortname=mixed,errors=remount-ro 0 0
# tree /efi/
/efi/
├── EFI
│ ├── BOOT
│ │ ├── BOOTX64.EFI
│ │ ├── fbx64.efi
│ │ ├── grubx64.efi
│ │ └── mt74x64.efi
│ ├── opensusetw
│ │ └── grubx64.efi
│ └── tubuntu
├── grub2
│ ├── customAB250-17.cfg
│ └── custom.cfg
├── MemTest86.log
├── mt74x64.efi
└── mt83x64.efi
11 directories, 10 files
# efibootmgr
BootCurrent: 0000
Timeout: 1 seconds
BootOrder: 0000,0001
Boot0000* opensusetw HD(1,GPT,5b33...,0x800,0xa0000)/File(\EFI\OPENSUSETW\GRUBX64.EFI)
Boot0001* UEFI OS HD(1,GPT,5b33...,0x800,0xa0000)/File(\EFI\BOOT\BOOTX64.EFI)0000424f
# grep -E 'efi|boot|esp' /etc/fstab
#LABEL=TM8P01ESP /boot/efi vfat codepage=437 0 0
#
This is a multiboot PC. Only one bootloader is necessary. It isn't Fedora on
this one. I noticed existence of /efi/ shortly after last dnf upgrade, looked
at its content, thought it must have been an errant backup of some kind, moved
the content elsewhere as just-in-case before removing it all, and sure enough,
no more booting possible from NVME until after restoring from the backup and
recreating the required EFI boot entry.
Why was/is the ESP mounted anywhere when there is/was no fstab entry for it?
Why does /efi/ exist?
I added a new noauto fstab entry for the ESP to a unique location not within
/boot/ and deleted /efi/, with the result that it stays unmounted, and /efi/
stays absent.
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