EFIubuntu

EFIubuntu refers to an installation of the Ubuntu operating system that utilizes the Unified Extensible Firmware Interface (UEFI) instead of the traditional BIOS. UEFI is a more modern firmware interface that replaces the older BIOS system found on most computers. When installing Ubuntu on a system that boots using UEFI, the installer will typically set up the operating system to also boot using UEFI. This involves creating specific partitions like the EFI System Partition (ESP) which stores bootloaders.

An EFIubuntu installation is generally straightforward on compatible hardware. The Ubuntu installer detects the UEFI environment and configures the necessary boot files accordingly. This allows for features like Secure Boot, which can enhance system security by ensuring that only trusted software is loaded during startup. Unlike legacy BIOS installations, EFIubuntu relies on bootloaders that are compatible with the UEFI specification. GRUB, the default bootloader for Ubuntu, has robust UEFI support.

Distinguishing between a UEFI and a BIOS installation of Ubuntu often involves checking the boot mode in the system's firmware settings or examining the disk partitioning scheme. In a UEFI setup, you'll typically find an EFI System Partition formatted as FAT32. While most modern computers come with UEFI, older systems might still use BIOS. For users aiming for compatibility and modern features, installing Ubuntu in UEFI mode is the standard approach.