5.3. Customising the bootup process

This chapter discusses customisation of bootup process of a live system, including kernel options, modifications to the bootloader, "splash" screens and startup scripts.


5.3.1. Kernel

5.3.2. Bootloaders

FIXME Choosing a bootloader

FIXME Syslinux

In the default configuration, Syslinux will pause indefinitely at its splash screen. To adjust this, modify the LH_SYSLINUX_TIMEOUT value or pass --syslinux-timeout TIMEOUT to lh_config. The value is specified in units of 1/10s and the maximum possible timeout is 35996. A timeout of 0 (zero) disables the timeout completely. For more information please see syslinux(1). Bootloader templates

FIXME Booting a Debian Live USB/HDD system from a USB stick with Grub

Suppose you've built your Debian Live USB/HDD image, but want to install it on an already used USB stick with ext2/3 partition and Grub bootloader:

First, copy live components in a directory on your key: the Linux kernel (vmlinuz*), its Initial RAM disk (initrd*) and the system (filesystem.squashfs):

# mkdir /media/myUsb/boot/live/
# cp binary/vmlinuz1 binary/initrd1.img binary/live/filesystem.squashfs /media/myUsb/boot/live/

Then, add a stanza in Grub's menu definition to boot up this system:

echo >>/media/myUsb/boot/grub/menu.lst  <<EOF

title           my Debian Live
root            (hd0,1)    # my Ext2 partition is the second on this stick
kernel          /boot/live/vmlinuz1 boot=live vga=791 persistent union=aufs live-media-path=boot/live
initrd          /boot/live/initrd1.img


The important kernel command line option to add here is <variablename>live-media-path</variablename>, which tells to Live initrd's script in which subdirectory to look for the SquashFS image.

Next, umount your USB stick and reboot on it. That's all!

5.3.3. Splash screens


5.3.4. Memtest


5.3.5. Startup scripts


5.3.6. Cheat codes