009 Embedded Linux-ARM. StorageQueries and discussion related to usage of Linux on ARM based devices. Linux has been ported to a variety of CPUs which are not only primarily used as the processor of a desktop or server computer, but also ARM, AVR32, ETRAX CRIS, FR-V, H8300, IP7000, m68k, MIPS, mn10300, SuperH, and Xtensa processors, It is also used as an alternative to using a proprietary operating system and toolchain. » 009.04.Boot Loaders
009.04.91.26. Could you explain how the `00_header` script in GRUB2's configuration sets up the initial environment and fundamental behaviors of the bootloader? Specifically, how does it manage default boot entries and handle environment variables such as `grubenv`?
00_header - It sets up initial environment and fundamental behaviour of bootloader.
Environmental variable loading - `grubenv` file is loaded which contains saved environment variables.
Fundamental behaviour - Default boot entry is done based on previous boots where `Savedefault` Fuction saves default boot entry and also menuentries that are unique in scripts are displayed.
