Meaning of LILO letter

Dragonfly

Hi, I nenver know this. SO post it here. Maybe some of you know this.
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Lilo prints its name one letter at a time on the screen. Each letter
is a signal that part of the bootstrap process has completed
successfully.  If lilo freezes your machine during boot-up, you can
discover useful information by looking at how far it got before
freezing.
- No part of LILO has been loaded. Either LILO isn't
installed or the partition on which its boot sector is located isn't
active.

L - The first stage boot loader has been loaded and started, but it
can't load the second stage boot loader (/boot/boot.b). The two-digit
error codes indicate the type of problem. This condition usually
indicates a media failure or a geometry mismatch.
LI - The first stage boot loader was able to load the second stageboot
loader, but has failed to execute it. This can either be caused by a
geometry mismatch or by moving /boot/boot.b without running the map
installer.  Perhaps you bilt a new kernel and did not run the
"lilo" command afterwards?

LIL - The second stage boot loader has been started, but it can't load
the descriptor table from the map file. This is typically caused by
a mediafailure or by a geometry mismatch.
LIL? - The second stage boot loader has been loaded at an incorrect
address. This is typically caused by a subtle geometry mismatch or
by moving /boot/boot.b without running the map installer. Try
rerunning lilo.

LIL- - The descriptor table is corrupt. This can either be caused by a
geometry bad/mismatch or by moving /boot/map without running the map
installer,or not reinstalling lilo (running the lilo command).

LILO - Lilo executed with no errors.