Reinaldo Souza juniorz

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

Intro

Operational PGP

This is a guide on how to email securely.

There are many guides on how to install and use PGP to encrypt email. This is not one of them. This is a guide on secure communication using email with PGP encryption. If you are not familiar with PGP, please read another guide first. If you are comfortable using PGP to encrypt and decrypt emails, this guide will raise your security to the next level.

I heard from GitHub Two-Factor Authentication](https://github.com/blog/1614-two-factor-authentication) nearly a couple of days ago when I was reading my RSS feed. I enabled it and couldn' push to any of my repositories anymore. Learn in this blog post how to fix it.

Two-Factor Authentication

"Is a process involving two stages to verify the identity of an entity trying to access services in a computer or in a network". Github solves this authentication with sending an SMS to a device which wants to push to their platform.

Enabling Two-Factor Authentication

The reason why you might get certificate errors in Ruby 2.0 when talking HTTPS is because there isn't a default certificate bundle that OpenSSL (which was used when building Ruby) trusts.

Update: this problem is solved in edge versions of rbenv and RVM.

$ ruby -rnet/https -e "Net::HTTP.get URI('https://github.com')"
net/http.rb:917:in `connect': SSL_connect returned=1 errno=0 state=SSLv3
  read server certificate B: certificate verify failed (OpenSSL::SSL::SSLError)

You can work around the issue by installing a certificate bundle that you trust. I trust Mozilla and curl.

	package main

	/*
	#cgo CFLAGS: -x objective-c
	#cgo LDFLAGS: -framework Cocoa
	#import <Cocoa/Cocoa.h>

	int
	StartApp(void) {
	[NSAutoreleasePool new];

	FROM ubuntu:12.04
	RUN DEBIAN_FRONTEND=noninteractive apt-get install -y openjdk-6-jdk curl git-core build-essential bzr
	RUN mkdir -p /tmp/downloads

	# install go
	RUN curl -sf -o /tmp/downloads/go1.1.1.linux-amd64.tar.gz -L https://go.googlecode.com/files/go1.1.1.linux-amd64.tar.gz
	RUN mkdir -p /opt && cd /opt && tar xfz /tmp/downloads/go1.1.1.linux-amd64.tar.gz

	# install jenkins
	RUN curl -sf -o /opt/jenkins-1.523.war -L http://mirrors.jenkins-ci.org/war/1.523/jenkins.war

	ubuntu@continubus:~/dockerfiles/go-agent$ docker ps
	ID IMAGE COMMAND CREATED STATUS PORTS
	d89f44c4df5b fujin/go-agent:latest /bin/sh -c /start.sh About a minute ago Up About a minute
	a132f54a0442 fujin/go-agent:latest /bin/sh -c /start.sh About a minute ago Up About a minute
	da8b513fbb2a fujin/go-agent:latest /bin/sh -c /start.sh About a minute ago Up About a minute
	c100df11f9d7 fujin/go-agent:latest /bin/sh -c /start.sh About a minute ago Up About a minute
	929adf4cbc3b fujin/go-agent:latest /bin/sh -c /start.sh About a minute ago Up About a minute
	79720ed86e0b fujin/go-agent:latest /bin/sh -c /start.sh About a minute ago Up About a minute
	ca9403fe93e2 fujin/go-agent:latest /b

	#!/usr/bin/env ruby

	require 'bundler'

	gems = ARGV

	if gems.empty?
	puts "Updating all gems"

	Bundler.definition(true)

	require 'formula'

	class Carbon < Formula
	homepage 'http://graphite.wikidot.com/'
	url 'http://pypi.python.org/packages/source/c/carbon/carbon-0.9.10.tar.gz'
	md5 '1d85d91fe220ec69c0db3037359b691a'

	depends_on 'python'
	depends_on 'twisted' => :python
	depends_on 'whisper'

	# Gemfile
	gem "puma"

	# Procfile
	web: bundle exec puma -p $PORT -e $RACK_ENV -C config/puma.rb

	# add to config block config/environments/production.rb
	config.threadsafe!

	# get rid of NewRelic after_fork code, if you were doing this: