GRUB 2 Menu

 
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Old 11-13-2016
GRUB 2 Menu

The quick & dirty question I have is... What app/script actually loads the Grub 2 menu system? And where is it located?

The longer question is I understand the core.img is loaded onto the first 63 sectors (stage 1.5) and after it loads I starts the stage 2 Grub bootloader which loads the Menu system. I've searched to try & figure this out but all I keep seeing are references to an ambiguous "Grub 2 bootloader"... What is the exact process of transferring the boot process between stage 1.5 and stage 2?

Can someone PLEASE help me with the specifics... at this point finding the answer has kicked in my OCD & it's driving me crazy.... Thanks!!!
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GRUB-SETUP(8)						  System Administration Utilities					     GRUB-SETUP(8)

NAME
grub-setup - set up a device to boot using GRUB SYNOPSIS
grub-setup [OPTION...] DEVICE DESCRIPTION
Set up images to boot from DEVICE. You should not normally run this program directly. Use grub-install instead. -a, --allow-floppy Make the drive also bootable as floppy (default for fdX devices). May break on some BIOSes. -b, --boot-image=FILE Use FILE as the boot image [default=boot.img] -c, --core-image=FILE Use FILE as the core image [default=core.img] -d, --directory=DIR Use GRUB files in the directory DIR [default=/boot/grub] -f, --force Install even if problems are detected -m, --device-map=FILE Use FILE as the device map [default=/boot/grub/device.map] -r, --root-device=DEV Use DEV as the root device [default=guessed] -s, --skip-fs-probe Do not probe for filesystems in DEVICE -v, --verbose Print verbose messages. -?, --help give this help list --usage give a short usage message -V, --version print program version Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options. DEVICE must be an OS device (e.g. /dev/sda). REPORTING BUGS
Report bugs to <bug-grub@gnu.org>. SEE ALSO
grub-install(8), grub-mkimage(1), grub-mkrescue(1) The full documentation for grub-setup is maintained as a Texinfo manual. If the info and grub-setup programs are properly installed at your site, the command info grub-setup should give you access to the complete manual. grub-setup (GRUB) 1.99-12ubuntu5 October 2011 GRUB-SETUP(8)