hello,

I don’t know if this is the right place to ask this question but could someone explain me how a UEFI system boots, I couldn’t find a guide online. I want to know because I don’t understand certain GRUB commands and how it get installed.

I just copy paste commands from Arch wiki and it just magically works without me knowing anything about it.

all the different distros use different grub command parameter and it’s so confusing. eg, Arch and Gentoo.

Arch command: grub-install --target=x86_64-efi --efi-directory=esp --bootloader-id=GRUB Gentoo command: grub-install --efi-directory=/efi

why both command is different? exactly where does grub gets installed?

sorry if this is a naive question but i really don’t understnad GRUB.

  • gnuhaut
    4·
    19 hours ago

    Pretty sure the main difference is that one puts stuff in a directory called esp (which I assume is a placeholder for the actual directory?), and the other one is put in /efi. That needs to be the path to your efi partition, because that’s where the UEFI expects to find things it can boot. The target is probably redundant, i.e. it defaults to x84_64-efi on Gentoo (maybe not on Arch?) and the id is just a name, you can put whatever there. See man grub-install.