Linux reboot to the UEFI setup screen like Windows 8:
=====================================================
You can reboot into UEFI settings from Linux Terminal by:

sudo systemctl reboot --firmware-setup


------------------------------------------------------
Source: https://superuser.com/questions/519718/linux-on-uefi-how-to-reboot-to-the-uefi-setup-screen-like-windows-8-can
Date: February 24th 2022