01-16-2014
GRUB Queries ?!
Hello,
I am posting the following questions here because I need them answered by people who have actually done a lot of work in GRUB.
DO NOT GIVE ME GUESS ANSWERS PLEASE. Feel free to redirect me if this is not the right place to ask these questions.
- Can I download GRUB separately from GNU GRUB - Obtaining GRUB ? If so why do Linux distributions such as Debian have their own versions of GRUB ? ie. Debian -- Details of package grub-efi-amd64 in squeeze. What is the difference and why are both required ?
- Does the recent version of GRUB require Linux configuration files before it can boot Linux ? Is that the reason why every Linux distro has its own version of GRUB ?
- If GRUB requires Linux configuration files then how does it boot Windows without similar config files ? And if it is possible to boot an OS like Windows with any extra files in the bootloader why isn't the same thing done for any Linux distro ? wouldn't that make things more streamlined ?
- Do all the recent versions of GRUB support EFI booting ?
- I have installed Debian on my pc without GRUB thus I can't access it. Can GRUB be installed now manually so that I can dual boot Windows and Debian in EFI mode ?
I am really confused about these basic things. I need to get these things cleared up before I ask further questions in this forum.
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LEARN ABOUT CENTOS
grub-editenv
GRUB-EDITENV(1) User Commands GRUB-EDITENV(1)
NAME
grub-editenv - edit GRUB environment block
SYNOPSIS
grub-editenv [OPTION...] FILENAME COMMAND
DESCRIPTION
Tool to edit environment block.
Commands:
create Create a blank environment block file.
list List the current variables.
set [NAME=VALUE ...]
Set variables.
unset [NAME ...]
Delete variables.
-?, --help
give this help list
--usage
give a short usage message
-v, --verbose
print verbose messages.
-V, --version
print program version
Options:
If FILENAME is `-', the default value /boot/grub/grubenv is used.
There is no `delete' command; if you want to delete the whole environment block, use `rm /boot/grub/grubenv'.
REPORTING BUGS
Report bugs to <bug-grub@gnu.org>.
SEE ALSO
grub-reboot(8), grub-set-default(8)
The full documentation for grub-editenv is maintained as a Texinfo manual. If the info and grub-editenv programs are properly installed at
your site, the command
info grub-editenv
should give you access to the complete manual.
grub-editenv (GRUB) 2.02-2ubuntu8.3 July 2018 GRUB-EDITENV(1)