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Setup Rails application production environment on Ubuntu

Add deploy user

ssh root@YOURDOMAIN
adduser deploy
visudo # Add deploy ALL=(ALL) ALL

Install necessary libraries

Preparing Jboss environment

Create Jboss user and group

Create a group for a system user (daemnos and program users like www-data, mysql...)

# addgroup --system jboss

Create a user (system user, without home -> See below the command, to the jboss group and no login shell)

Some JavaScript

// Delete confirmation modals
$('#delete-confirm').on('show', function() {
  var $submit = $(this).find('.btn-danger'),
      href = $submit.attr('href');
  $submit.attr('href', href.replace('pony', $(this).data('id')));

Some CoffeeScript (verbosely commented for clarity)

# Override Rails handling of confirmation

$.rails.allowAction = (element) ->
  # The message is something like "Are you sure?"
  message = element.data('confirm')

	<!DOCTYPE html>
	<html>
	<head>
	<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
	<title>One Graph</title>
	<script type="text/javascript" src="http://mbostock.github.com/d3/d3.v2.js"></script>
	<script type="text/javascript" src="simple-graph.js"></script>
	<style type="text/css">
	body { font: 13px sans-serif; }
	rect { fill: #fff; }

	# https://www.varnish-cache.org/docs/2.1/tutorial/vcl.html
	# https://www.varnish-cache.org/trac/wiki/VCLExamples

	# Summary
	# 1. Varnish will poll the backend at /health_check to make sure it is
	# healthy. If the backend goes down, varnish will server stale content
	# from the cache for up to 1 hour.
	# 2. Varnish will pass X-Forwarded-For headers through to the backend
	# 3. Varnish will remove cookies from urls that match static content file
	# extensions (jpg, gif, ...)

	class Api::RegistrationsController < Api::BaseController

	respond_to :json
	def create

	user = User.new(params[:user])
	if user.save
	render :json=> user.as_json(:auth_token=>user.authentication_token, :email=>user.email), :status=>201
	return
	else

	require 'haml'

	class ErbEngine < Haml::Engine
	def push_script(text, preserve_script, in_tag = false, preserve_tag = false,
	escape_html = false, nuke_inner_whitespace = false)
	push_text "<%= #{text.strip} %>"
	end

	def push_silent(text, can_suppress = false)
	push_text "<% #{text.strip} %>"

	echo "deb http://emdebian.org/debian/ lenny main" >> /etc/apt/sources.list
	apt-get update
	apt-get install binutils-arm-linux-gnueabi gcc-4.3-arm-linux-gnueabi libc6-dev-armel-cross

	cd /path/to/ruby/1.8.7/sources
	autoconf
	CFLAGS="--static" LDFLAGS="--static" CC="arm-linux-gnueabi-gcc" ac_cv_func_setpgrp_void=yes ac_cv_func_isinf=no ac_cv_func_isnan=no ac_cv_func_finite=no CROSS_COMPILING=1 ./configure --host="arm-linux-gnueabi" --prefix=/mnt/us/opt
	make
	make install

	class ApplicationController < ActionController::Base
	# ...

	unless Rails.application.config.consider_all_requests_local
	rescue_from Exception, with: lambda { \|exception\| render_error 500, exception }
	rescue_from ActionController::RoutingError, ActionController::UnknownController, ::AbstractController::ActionNotFound, ActiveRecord::RecordNotFound, with: lambda { \|exception\| render_error 404, exception }
	end

	private
	def render_error(status, exception)