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tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

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How To Secure Nginx with Let's Encrypt on Ubuntu 16.04

Step 1 — Installing Certbot

First, add the repository.

sudo add-apt-repository ppa:certbot/certbot

You'll need to press ENTER to accept. Then, update the package list to pick up the new repository's package information.

sudo apt-get update

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function slugify(text)
{
  return text.toString().toLowerCase()
    .replace(/\s+/g, '-')           // Replace spaces with -
    .replace(/[^\w\-]+/g, '')       // Remove all non-word chars
    .replace(/\-\-+/g, '-')         // Replace multiple - with single -
    .replace(/^-+/, '')             // Trim - from start of text
    .replace(/-+$/, '');            // Trim - from end of text
}

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OS X Terminal color prompt

Update .bash_profile with content:

export CLICOLOR=1
export PS1="\[\e[36m\]\w\[\e[0m\]$ "
alias ll='ls -GFhl' dir='ls -GFhl'
alias start=open
printf "\033]0;`date "+%a %d %b %Y %I:%M %p"`\007"

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# an initializer
# gem install bunny
# written by: Tam Nguyen (twitter: @nguyentamvn)

require 'bunny'
require 'json'

class RabbitPublisher
  def initialize(options = {})
    bunny_config = {

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Tutorial: Designing a GraphQL API

This tutorial was created by Shopify for internal purposes. We've created a public version of it since we think it's useful to anyone creating a GraphQL API.

It's based on lessons learned from creating and evolving production schemas at Shopify over almost 3 years. The tutorial has evolved and will continue to change in the future so nothing is set in stone.

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ActionCable: How to use dynamic channels

Pass a roomId on your subscription creation in javascripts/channels/room.js:

MakeMessageChannel = function(roomId) {
  // Create the new room channel subscription
  App.room = App.cable.subscriptions.create({
    channel: "RoomChannel",
    roomId: roomId
 }, {