UEFI

• Arch wiki: UEFI

UEFI or bios mode ?

Did my system boot in EFI mode ?

ls /sys/firmware/efi/

Does my system booted with EFI secure boot ?

mokutil --sb-state

Migrate existing system from Bios to UEFI

• Switch Debian from legacy to UEFI boot mode

UEFI secure boot

• Arch wiki: UEFI secure boot
• Debian wiki: Secure boot