In EFI/ UEFI shell how to reboot or shutdown the system?

Question

Having consulted resources related to the commands available in a UEFI/EFi Shell I cannot find two commands I would expect to be available

1. reboot
2. poweroff/halt/shutdown

What am I missing here? (can it be that EFI shell is somewhat overengineered, but lacks basic functionality?)

Solution

The command reset will do both poweroff and reboot. From the UEFI Shell Specification

reset

Summary

Resets the system.

Usage

reset [-w|-s|-c [string]] [-fwui]

Options

-s

• Performs a shutdown

-w

• Performs a warm boot

-c

• Performs a cold boot

string

• String to be passed to reset service

-fwui

If the system firmware supports it, perform a reset back to the firmware user interface (FW UI)

Examples

To shut down the system:

Shell> reset -s

To cold reset the system and stop boot at the firmware user interface:

Shell> reset –c -fwui