Novell LINUX ENTERPRISE SERVER 10 SP2 - INSTALLATION AND ADMINISTRATION Installation Manual page 426

21.2.1 The GRUB Boot Menu
The graphical splash screen with the boot menu is based on the GRUB configuration
file /boot/grub/menu.lst, which contains all information about all partitions or
operating systems that can be booted by the menu.
Every time the system is booted, GRUB loads the menu file from the file system. For
this reason, GRUB does not need to be reinstalled after every change to the file. Use
the YaST boot loader to modify the GRUB configuration as described in Section 21.3,
"Configuring the Boot Loader with YaST" (page 416).
The menu file contains commands. The syntax is very simple. Every line contains a
command followed by optional parameters separated by spaces like in the shell. For
historical reasons, some commands permit an = in front of the first parameter. Comments
are introduced by a hash (#).
To identify the menu items in the menu overview, set a title for every entry. The
text (including any spaces) following the keyword title is displayed as a selectable
option in the menu. All commands up to the next title are executed when this menu
item is selected.
The simplest case is the redirection to boot loaders of other operating systems. The
command is chainloader and the argument is usually the boot block of another
partition, in GRUB block notation. For example:
chainloader (hd0,3)+1
The device names in GRUB are explained in Section "Naming Conventions for Hard
Disks and Partitions" (page 409). This example specifies the first block of the fourth
partition of the first hard disk.
Use the command kernel to specify a kernel image. The first argument is the path to
the kernel image in a partition. The other arguments are passed to the kernel on its
command line.
If the kernel does not have built-in drivers for access to the root partition or a recent
Linux system with advanced hotplug features is used, initrd must be specified with
a separate GRUB command whose only argument is the path to the initrd file. Be-
cause the loading address of the initrd is written into the loaded kernel image, the
command initrd must follow after the kernel command.
408 Installation and Administration