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# Bootloader
This document covers installing and configuring the two bootloaders available in Alice Linux: Limine and GRUB.
## Limine
Limine is a modern, lightweight bootloader supporting BIOS and UEFI.
Install the package:
```
# apkg -I limine
```
### BIOS
Deploy Limine to the target disk:
```
# limine bios-install /dev/sdX
```
### UEFI
Copy the Limine EFI executable to the EFI system partition:
```
# mkdir -p /boot/EFI/BOOT
# cp /usr/share/limine/BOOTX64.EFI /boot/EFI/BOOT
```
### Configuration
Create `/boot/limine.conf`:
```
timeout: 5
/Alice Linux
protocol: linux
kernel_path: boot():/vmlinuz
cmdline: root=/dev/sda2 rw loglevel=3 quiet
module_path: boot():/initrd-linux
```
Use `boot()` to reference the partition where `/boot` resides, or specify the partition directly with `uuid()` or a path like `hd(0,2)`.
For full configuration options, see the [Limine documentation](https://github.com/limine-bootloader/limine/blob/trunk/CONFIG.md).
## GRUB
GRUB is the GNU Grand Unified Bootloader, supporting UEFI on x86_64 only.
Install the package:
```
# apkg -I grub
```
### Install
Install GRUB for UEFI (requires the EFI system partition mounted at `/boot`):
```
# grub-install --target=x86_64-efi --efi-directory=/boot
```
### Configuration
Generate the GRUB configuration file:
```
# grub-mkconfig -o /boot/grub/grub.cfg
```
GRUB settings are controlled by `/etc/default/grub`. Key options:
- **`GRUB_DEFAULT`**: Default menu entry (default: `0`)
- **`GRUB_TIMEOUT`**: Seconds before booting the default entry (default: `5`)
- **`GRUB_CMDLINE_LINUX_DEFAULT`**: Kernel command line arguments
- **`GRUB_GFXMODE`**: Framebuffer resolution (default: `auto`)
- **`GRUB_DISABLE_OS_PROBER`**: Disable probing for other operating systems (default: enabled for security)
After editing `/etc/default/grub`, regenerate the config:
```
# grub-mkconfig -o /boot/grub/grub.cfg
```
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