Ben Peachey Potherca

Exporting your 2FA tokens from Authy to transfer them into another 2FA application

IMPORTANT - Update regarding deprecation of Authy desktop apps

Past August 2024, Authy stopped supported the desktop version of their apps:
See Authy is shutting down its desktop app | The 2FA app Authy will only be available on Android and iOS starting in August for details.

And indeed, after a while, Authy changed something in their backend which now prevents the old desktop app from logging in. If you are already logged in, then you are in luck, and you can follow the instructions below to export your tokens.

If you are not logged in anymore, but can find a backup of the necessary files, then restore those files, and re-install Authy 2.2.3 following the instructions below, and it should work as expected.

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

What's an Effective Engineer?

Bash command line Shortcuts

Picked these from here

Command Editing Shortcuts

Command	Note
`Ctrl` + `a`	go to the start of the command line
`Ctrl` + `e`	go to the end of the command line
Ctrl + k	delete from cursor to the end of the command line

Create a bookmark with the following text in the URL field:

javascript:(function() {
  if (!document.querySelectorAll('link[rel*=icon]').length) {
      const link = document.createElement('link');
      link.rel   = 'icon';
      document.querySelector('head').appendChild(link);
  }

Regular Expression Engine Comparison Chart

Many different applications claim to support regular expressions. But what does that even mean?

Well there are lots of different regular expression engines, and they all have different feature sets and different time-space efficiencies.

The information here is just copied from: http://regular-expressions.mobi/refflavors.html

Falsehoods programmers believe about addresses

This is an anchor-linked version of the excellent, amazing original opus magnum by Michael Tandy.

An address will start with, or at least include, a building number.

Counterexample: Royal Opera House, Covent Garden, London, WC2E 9DD, United Kingdom.

When there is a building number, it will be all-numeric.

Counterexample: 1A Egmont Road, Middlesbrough, TS4 2HT

	#!/bin/bash
	parent_short_id=$1
	parent_id=`docker inspect --format '{{.Id}}' $1`

	get_kids() {
	local parent_id=$1
	docker inspect --format='ID {{.Id}} PAR {{.Parent}}' $(docker images -a -q) \| grep "PAR ${parent_id}" \| sed -E "s/ID ([^ ]) PAR ([^ ])/\1/g"
	}

	print_kids() {

	<?php

	if (!function_exists('interface_exists')) {
	die('PHP version too old');
	}
	$throwables = listThrowableClasses();
	$throwablesPerParent = splitInParents($throwables);
	printTree($throwablesPerParent);
	if (count($throwablesPerParent) !== 0) {
	die('ERROR!!!');

	for f in /usr/share/figlet/*
	do
	fs=$(basename $f)
	fname=${fs%%.tlf}
	toilet -f $fname $fname
	done

	<?php declare(strict_types=1);

	require_once "✨.🐘";

	✨($_)->strlen("foo")->var_dump($_);