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| #language en ~-[[DebianWiki/EditorGuide#translation|Translation(s)]]: none-~ ---- Since Wheezy, Debian kernel on x86 contain their own [[BootLoader]] called EFI stub. Therefore it is possible to load the kernel directly, without any additional bootloader (like grub-efi). ## If your page gets really long, uncomment this Table of Contents ## <<TableOfContents(2)>> === Copy the files === The UEFI firmware is only able to load files from the EFI partition (usually FAT). If you use a standard UEFI installation of Debian, you should copy the kernel and the initrd to /boot/efi. The best way to keep it up to date is to place a script in /etc/kernel/postinst.d/zz-update-efistub: {{{#!highlight bash #!/bin/sh cp /vmlinuz /initrd.img /boot/efi/EFI/debian/ }}} Make it executable and launch it manually: {{{ chmod +x /etc/kernel/postinst.d/zz-update-efistub ./etc/kernel/postinst.d/zz-update-efistub }}} === Add the boot entry === Replace the UUID with the one of your / partition, see the [[http://manpages.debian.net/cgi-bin/man.cgi?query=efibootmgr|efibootmgr manpage]] if you EFI partition is not /dev/sda1: {{{ efibootmgr -c -g -L "Debian (EFI stub)" -l '\EFI\debian\vmlinuz' -u 'root=UUID=$UUID ro quiet rootfstype=ext4 add_efi_memmap initrd=\\EFI\\debian\\initrd.img' }}} You can check your new boot entry. Since EFI uses UCS2, it should look like this: {{{ #efibootmgr -v ... .i.n.i.t.r.d.=.\.E.F.I.\.d.e.b.i.a.n.\.i.n.i.t.r.d. }}} {{{#!wiki tip If you were installing Debian from UEFI medium, `efibootmgr` should be installed by default. However, sometimes it can report that EFI variables are not supported. If you are '''sure''' that you have EFI partition, probably you need to download `efivar` package and modprobe `efivars` module. }}} ## You can add other _helpful_ links here. ##== See also == ---- ## If this page belongs to an existing Category, add it below. CategoryBootProcess |
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