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Extlinux

Since the version 0.6.58 there's a new extlinux helper code that replaces flash-kernel making it possible to have completely device agnostic images, as long as images do have SPI flash and u-boot loaded there (not yet, but in the future).

The new extlinux makes it easy to switch between all installed kernel versions.

The extlinux.conf is generated from contents of /boot and /etc/default/extlinux. The configuration is automatically generated on the kernel installation.

You can edit /etc/default/extlinux to configure for example command line.

Enable it

new_extlinux_boot.sh rootfs

It will make to boot device from / instead of /boot/efi that was used before.

Disable it

new_extlinux_boot.sh flash-kernel

Manually regenerate configuration

update_extlinux.sh

Inspect configuration

The result is stored in /boot/extlinux/extlinux.conf.