Linux Filesystem Hierarchy(/boot)

/boot/boot.0300

Backup master boot record.

/boot/boot.b

This is installed as the basic boot sector. In the case of most modern distributions it is actually a symbolic link to one of four files /boot/boot-bmp.b, /boot/boot-menu.b, /boot/boot-text.b, /boot/boot-compat.b which allow
a user to change the boot-up schema so that it utilises a splash screen, a simple menu, a text based interface or a minimal boot loader to ensure compatibility respectively. In each case re-installation of lilo is necessary in order to complete the changes.
To change the actual 'boot-logo' you can either use utilities such as fblogo or the more refined bootsplash.

/boot/chain.b

Used to boot non-Linux operating systems.

/boot/config-kernel-version

Installed kernel configuration. This file is most useful when compiling kernels on other systems or device modules

/boot/os2_d.b

Used to boot to the 0S/2 operating system.

/boot/map

Contains the location of the kernel.

/boot/vmlinuz, /boot/vmlinuz-kernel-version

Normally the kernel or symbolic link to the kernel.

/boot/grub

This subdirectory contains the GRUB configuration files including boot-up images and sounds. GRUB is the GNU GRand Unified Bootloader, a project which intends to solve all bootup problems once and for all. One of the most interesting
features, is that you don't have to install a new partition or kernel, you can change all parameters at boot time via the GRUB Console, since it knows about the filesystems.

/boot/grub/device.map

Maps devices in /dev to those used by grub. For example, (/dev/fd0) is represented by /dev/fd0 and (hd0, 4) is referenced by /dev/hda5.

/boot/grub/grub.conf, /boot/grub/menu.lst

Grub configuration file.

/boot/grub/messages

Grub boot-up welcome message.

/boot/grub/splash.xpm.gz

Grub boot-up background image