Lilo linux loader is a boot loader to load linux, and other operating systems. Lilo is called by default when running make install in kernel source directories.
# emerge lilo
Lilo's default configuration example has hda references, lets change those to sda recursively using sed.
# sed -i -e 's/hda/sda/' /etc/lilo.conf.example
Now we copy the example configuration to the running configuration.
# cp /etc/lilo.conf.example /etc/lilo.conf
image = /boot/bzImage initrd=/boot/init.bzImage label = Funtoo-Debsrcs read-only # read-only for checking append="quiet real_root=/dev/sda1"
To change default booting os.
# MBR to install LILO to: boot = /dev/sda map = /boot/.map default = Funtoo
To have lilo auto start after a set time.
# If you always want to see the prompt with a 15 second timeout: timeout=150
For silent kernel decompression at boot:
label = Funtoo read-only # read-only for checking append = "quiet"
alternate init systems
to load an alternate init system, example systemd instead of openrc:
label = Funtoo-systemd read-only # read-only for checking append = "quiet init=/usr/lib/systemd/systemd"
It is a good idea to keep an old image around in case problems crop up in new kernel builds.
#image = /boot/bzImage.old root = /dev/sda3 #root = /devices/discs/disc0/part3 label = funtoo.old read-only # read-only for checking#
Using symlinks is a good idea to be able to determine if the loader is loading the correct image, and enable tab auto completion to ensure we are loading what we intend to. symlinks remove an easy area to fumble when adjusting configurations.
First install of debian sources:
# ln -s /boot/kernel-debian-sources-* /boot/bzImage
# ln -s /boot/initramfs-debian-sources-* /boot/init.bzImage
If you have multiple debian sources installed, and compiled, change the * to the exact file name.
# ln -s /boot/vmlinuz-version /boot/bzImage
# ln -s /boot/vmlinuz-version.old /boot/bzImage.old
if you do not use make install to copy your kernel to /boot, you must run lilo to load the new kernel images & install lilo to the hard drives mbr
Install lilo to the MBR.
problem: Fatal: First sector of /dev/sda1 doesn't have a valid boot signature solution: delete or comment out un-used blocks at the bottom of /etc/lilo.conf and just leave in the funtoo statements.