Rick Blommers gamecreature

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.

Git Subtree Basics

If you hate git submodule, then you may want to give git subtree a try.

Background

When you want to use a subtree, you add the subtree to an existing repository where the subtree is a reference to another repository url and branch/tag. This add command adds all the code and files into the main repository locally; it's not just a reference to a remote repo.

When you stage and commit files for the main repo, it will add all of the remote files in the same operation. The subtree checkout will pull all the files in one pass, so there is no need to try and connect to another repo to get the portion of subtree files, because they were already included in the main repo.

Adding a subtree

Let's say you already have a git repository with at least one commit. You can add another repository into this respository like this:

The code here is a tech demo showing how to switch between databases in Rails 5, in a thread-safe manner.

BACKGROUND: HOW NOT TO CHANGE DATABASES

The simple way to switch databases is:

ActiveRecord::Base.establish_connection :user_shard1
puts User.find(1) # this is executed on the database keyed on "user_shard1" in database.yml
ActiveRecord::Base.establish_connection :development

Generate keys for system SSH deamon

System openssh

Generate all key types:

/etc/rc.d/sshd keygen

	<VirtualHost :80 :443>
	# Domain
	ServerName servername.domain

	SSLEngine On
	SSLProxyEngine On
	# Path to SSL CRT file
	SSLCertificateFile /etc/apache2/ssl/apache.crt
	# Path to SSL KEY file
	SSLCertificateKeyFile /etc/apache2/ssl/apache.key

	# FreeBSD 10.2 -- /etc/sysctl.conf version 0.47
	# https://calomel.org/freebsd_network_tuning.html
	#
	# low latency is important so we highly recommend that you disable hyper
	# threading on Intel CPUs as it has an unpredictable affect on latency, cpu
	# cache misses and load.
	#
	# These settings are specifically tuned for a "low" latency FIOS (300/300) and
	# gigabit LAN connections. If you have 10gig or 40gig you will need to increase
	# the network buffers as proposed. "man tuning" for more information.

	# Generate your backup private key and certificate
	openssl req -nodes -newkey rsa:1536 -x509 -keyout backup.key -out backup.crt

	# Encrypt your data to a temporary folder
	rsyncrypto --verbose --ne-nesting=2 --trim=2 --name-encrypt=/tmp/rsyncrypto-map --delete-keys --changed --recurse /home/cristian/Dropbox/ /tmp/Dropbox/ /tmp/rsyncrypto-keys ~/Dropbox/backups/laptop/crypto/rsyncrypto/backup.crt

	# Send it over the network
	rsync --verbose --archive --compress --delete /tmp/Dropbox/ pi:~/backups/laptop

	# Decryption time!

	require 'rails_helper'

	RSpec.describe TodosController, :type => :controller do

	describe "GET #index" do
	#describe "POST #create" do
	#describe "GET #show" do
	#describe "PATCH #update" do (or PUT #update)
	#describe "DELETE #destroy" do
	#describe "GET #new" do

	# /etc/make.conf
	# Clemens Gruber, 2017
	#

	# Nearby mirror
	#MASTER_SITE_OVERRIDE="ftp://ftp.at.freebsd.org/pub/FreeBSD/ports/distfiles/"
	#MASTER_SITE_OVERRIDE="ftp://ftp.de.freebsd.org/pub/FreeBSD/ports/distfiles/"

	# Build
	MAKE_JOBS_NUMBER?=8

	module Paperclip

	# A wrapper for a queued item. Normally this would be a temporary file, but we can't do that, because Paperclip
	# would copy the temporary file before the content is actually written.
	class BulkQueueItem
	attr_reader :destination
	def initialize(destination)
	@destination = destination
	end
	end