Snawoot

Don't use VPN services.

No, seriously, don't. You're probably reading this because you've asked what VPN service to use, and this is the answer.

Note: The content in this post does not apply to using VPN for their intended purpose; that is, as a virtual private (internal) network. It only applies to using it as a glorified proxy, which is what every third-party "VPN provider" does.

A Russian translation of this article can be found here, contributed by Timur Demin.
A Turkish translation can be found here, contributed by agyild.
There's also this article about VPN services, which is honestly better written (and has more cat pictures!) than my article.

Moved to git repository: https://github.com/denji/golang-tls

Generate private key (.key)

# Key considerations for algorithm "RSA" ≥ 2048-bit
openssl genrsa -out server.key 2048

# Key considerations for algorithm "ECDSA" ≥ secp384r1
# List ECDSA the supported curves (openssl ecparam -list_curves)

How to mount a qcow2 disk image

This is a quick guide to mounting a qcow2 disk images on your host server. This is useful to reset passwords, edit files, or recover something without the virtual machine running.

Step 1 - Enable NBD on the Host

modprobe nbd max_part=8

	curl --include \
	--no-buffer \
	--header "Connection: Upgrade" \
	--header "Upgrade: websocket" \
	--header "Host: example.com:80" \
	--header "Origin: http://example.com:80" \
	--header "Sec-WebSocket-Key: SGVsbG8sIHdvcmxkIQ==" \
	--header "Sec-WebSocket-Version: 13" \
	http://example.com:80/

	package main

	// https://github.com/dps/go-xml-parse/blob/master/go-xml-parse.go

	import (
	"fmt"
	"os"
	"encoding/xml"
	)

	# You don't need Fog in Ruby or some other library to upload to S3 -- shell works perfectly fine
	# This is how I upload my new Sol Trader builds (http://soltrader.net)
	# Based on a modified script from here: http://tmont.com/blargh/2014/1/uploading-to-s3-in-bash

	S3KEY="my aws key"
	S3SECRET="my aws secret" # pass these in

	function putS3
	{
	path=$1

	def power(base, exp):
	""" Fast power calculation using repeated squaring """
	if exp < 0:
	return 1 / power(base, -exp)
	ans = 1
	while exp:
	if exp & 1:
	ans *= base
	exp >>= 1
	base *= base

	#!/usr/bin/env python
	"""
	LICENSE http://www.apache.org/licenses/LICENSE-2.0
	"""

	import argparse
	import datetime
	import sys
	import time
	import threading

	# Heavily depends on:
	# libqrencode (fukuchi.org/works/qrencode/)
	# paperkey (jabberwocky.com/software/paperkey/)
	# zbar (zbar.sourceforge.net)

	# Producing the QR codes:
	# Split over 4 codes to ensure the data per image is not too large.
	gpg --export-secret-key KEYIDGOESHERE \| paperkey --output-type raw \| base64 > temp
	split temp -n 4 IMG
	for f in IMG*; do cat $f \| qrencode -o $f.png; done