/usr/share/doc/grub-<version-number>/
— This directory contains good information about using and
configuring GRUB, where
<version-number> corresponds to
the version of the GRUB package installed.
info grub — The GRUB info page
contains a tutorial, a user reference manual, a programmer
reference manual, and a FAQ document about GRUB and its usage.
https://www.gnu.org/software/grub/
— The home page of the GNU GRUB project. This site
contains information concerning the state of GRUB development
and an FAQ.
https://www.linuxgazette.com/issue64/kohli.html
— An introductory article discussing the configuration of
GRUB on a system from scratch, including an overview of GRUB
command line options.
Red Hat Enterprise Linux Security Guide; Red Hat, Inc. — The
Workstation Security chapter explains, in a
concise manner, how to secure the GRUB boot loader.
