Re: F27 boots to grub> after (failed?) dnf update ?

[linux guy <linuxguy123@xxxxxxxxx>]

Thanks for the reply.

I thought that "set root=(lvm/fedora/root)" told the boot process where root was.  Where is this stuff documented ?

So I should add something like "root=/dev/mapper/fedora-root" to the Linuxefi line ?  Do I need anything else to get a minimal system running ?

On Mon, Mar 26, 2018 at 4:38 PM, Samuel Sieb <samuel@xxxxxxxx> wrote:

On 03/26/2018 09:14 AM, linux guy wrote:

"Minimal BASH-like line editing..." grub>

So...

grub> set root=(lvm/fedora/root)
grub> linuxefi (hd0,gpt2)/linuz-4.14.13-300.fc27.x86_64
grub>initrdefi (hd0,gpt2)/initramfs-4.14.13-300.fc27.x86_64.img
grub>boot

This gives me a switch root error and stops at the emergency mode prompt #.

You're missing all the parameters to the kernel that tell it where the root is.

How do I get my server to boot again ?

>From your other email:

> grub2-mkconfig -o /boot/grub2/grub.cfg

That's the wrong place for an EFI system.  You need to mount the EFI partition (probably /dev/sda1 in your case) at /boot/efi and the grub.cfg is in /boot/efi/EFI/fedora/.
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