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85 lines
4.0 KiB
Plaintext
85 lines
4.0 KiB
Plaintext
efibootmgr
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This is efibootmgr, a Linux user-space application to modify the Intel
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Extensible Firmware Interface (EFI) Boot Manager. This application can create
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and destroy boot entries, change the boot order, change the next running boot
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option, and more.
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Upstream: https://github.com/rhboot/efibootmgr
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[000] Index
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________________________________________________________________________________
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* Installation ........................................................... [001]
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* Setup .................................................................. [002]
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* Mounting The efivar Filesystem ....................................... [003]
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* Booting The System With An EFISTUB ................................... [004]
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* Usage .................................................................. [005]
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* References ............................................................. [006]
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[001] Installation
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________________________________________________________________________________
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+------------------------------------------------------------------------------+
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| $ kiss b efibootmgr |
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+------------------------------------------------------------------------------+
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[002] Setup
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________________________________________________________________________________
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--[003] Mounting The efivar Filesystem -----------------------------------------
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To use efibootmgr and other software to manipulate the UEFI boot entries, the
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efivars filesystem must be mounted. This isn't handled automatically by KISS
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due to the security implications in doing so. [1]
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+----------------------------------------------------------------------------+
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| $ mount -t efivarfs none /sys/firmware/efi/efivars/ |
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+----------------------------------------------------------------------------+
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--[004] Booting The System With An EFISTUB -------------------------------------
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Using an EFISTUB to boot the system removes the need for a bootloader and
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shortens boot times. Ensure that the following options are enabled in your
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kernel: CONFIG_EFI, CONFIG_EFI_STUB
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Run the following command to create a boot entry (replacing example arguments
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with their respective values). X and Y should point to where the ESP is
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located.
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+----------------------------------------------------------------------------+
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| $ efibootmgr \ |
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| --disk /dev/sdX \ |
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| --part Y \ |
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| --create \ |
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| --label "KISS" \ |
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| --loader /vmlinuz \ |
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| --unicode 'root=PARTUUID=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX rw' \ |
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| --verbose |
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+----------------------------------------------------------------------------+
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[005] Usage
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________________________________________________________________________________
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Refer to the manual pages and command help output for more information.
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[006] References
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________________________________________________________________________________
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[0] https://github.com/rhboot/efibootmgr
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[1] https://github.com/systemd/systemd/issues/2402
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