Alex Shevchenko skeeet

Ubuntu Grub Boot Kernel

Boot a specific installed Ubuntu kernel using grub-reboot and grub-set-default.

This allows you to pick what kernel you want to boot on next reboot, or set the default, without having to know much about how grub works or editing config files.

Usage

  Usage: boot-kernel [options] [kernel]

call grub-reboot or grub-set-default to boot the provided kernel.

Native Secure Enclave backed ssh keys on MacOS

It turns out that MacOS Tahoe can generate and use secure-enclave backed SSH keys! This replaces projects like https://github.com/maxgoedjen/secretive

There is a shared library /usr/lib/ssh-keychain.dylib that traditionally has been used to add smartcard support to ssh by implementing PKCS11Provider interface. However since recently it also implements SecurityKeyProivder which supports loading keys directly from the secure enclave! SecurityKeyProvider is what is normally used to talk to FIDO2 devices (e.g. libfido2 can be used to talk to your Yubikey). However you can now use it to talk to your Secure Enclave instead!

	import CoreML
	import XCTest
	@testable import mlsample

	class mlsampleTests: XCTestCase {

	override func setUp() {
	super.setUp()
	}

	import torch

	def gauss_kernel(size=5, device=torch.device('cpu'), channels=3):
	kernel = torch.tensor([[1., 4., 6., 4., 1],
	[4., 16., 24., 16., 4.],
	[6., 24., 36., 24., 6.],
	[4., 16., 24., 16., 4.],
	[1., 4., 6., 4., 1.]])
	kernel /= 256.
	kernel = kernel.repeat(channels, 1, 1, 1)

	import mmap
	import torch
	import json
	import os
	from huggingface_hub import hf_hub_download


	def load_file(filename, device):
	with open(filename, mode="r", encoding="utf8") as file_obj:
	with mmap.mmap(file_obj.fileno(), length=0, access=mmap.ACCESS_READ) as m:

	# https://youtu.be/DNKAvDeqH_Y
	# https://google.github.io/mediapipe/solutions/iris.html#ml-pipeline
	# https://google.github.io/mediapipe/solutions/face_mesh.html#python-solution-api

	import cv2 as cv
	import numpy as np
	from mediapipe import solutions

	LEFT_IRIS = [pair[0] for pair in solutions.face_mesh.FACEMESH_LEFT_IRIS]
	RIGHT_IRIS = [pair[0] for pair in solutions.face_mesh.FACEMESH_RIGHT_IRIS]