Answer :
The GRUB2 configuration file (non-editable) is the script that identifies kernels on the root device and creates menu entries.
What us a GRUB2 configuration file?
GRUB, or GRand Unified Bootloader, is an acronym. At boot time, it takes over from the BIOS, loads itself, then loads the Linux kernel into memory before handing control of execution to the kernel. GRUB has served its purpose and is no longer required after the kernel takes over.
Multiple Linux kernels are supported by GRUB, and a menu lets the user choose one of them during bootup. This has proven to be a really helpful tool for me because I have frequently run into issues with programmes or system services that are incompatible with a specific kernel version. Many times, problems like these can be avoided by booting to an older kernel.
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