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technology/linux/systemd/systemd-boot.md

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+---
+obj: application
+arch-wiki: https://wiki.archlinux.org/title/Systemd-boot
+---
+
+# Systemd Boot
+systemd-boot is a simple UEFI boot manager which executes configured EFI images. The default entry is selected by a configured pattern (glob) or an on-screen menu to be navigated via arrow keys. It is included with [systemd](systemd/Systemd.md), which is installed on an Arch system by default.
+
+It is simple to configure but can only start EFI executables such as the [Linux](Linux.md) kernel EFISTUB, UEFI shell, GRUB, or the [Windows](../../windows/Windows.md) Boot Manager.
+
+## Install
+Install:
+```shell
+bootctl install
+```
+
+Update:
+```shell
+bootctl update
+```
+
+## Configuration
+The loader configuration is stored in the file `_esp_/loader/loader.conf`
+Example:
+```
+default  arch.conf
+timeout  4
+console-mode max
+editor   no
+```
+
+### Adding loaders
+_systemd-boot_ will search for boot menu items in `_esp_/loader/entries/*.conf`
+
+Values:
+- `title` : Name
+- `version` : Kernel Version
+- `efi` : EFI Executable
+- `options` : Kernel Parameter
+
+Example:
+`_esp_/loader/entries/arch.conf`
+```
+title   Arch Linux
+linux   /vmlinuz-linux
+initrd  /intel-ucode.img
+initrd  /initramfs-linux.img
+options root="LABEL=_arch_os_" rw
+```
+
+## Changing Boot
+Choosing next boot:
+```shell
+systemctl reboot --boot-loader-entry=arch-custom.conf
+```
+
+Firmware Setup:
+```shell
+systemctl reboot --firmware-setup
+```