efibootmgr

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How to check if a computer is using BIOS or UEFI; GRUB or systemd-boot bootloader; MBR or GPT partition table

Author: Aleksei Miloserdov Jun 17, 2022 BIOS boot loader bootctl efibootmgr efivar fdisk file systems GPT GRUB lsblk MBR partition tables System Boot systemd-boot UEFI Linux

How to know if UEFI or GRUB is being used? The system booting process consists of the following 4 steps: System initialization: UEFI or BIOS (POST) Starting the bootloader (GRUB2 or systemd-boot) Kernel initialization Starting sys…

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