Hmmm no idea why this works and other combinations of popen don't.

gistfile1.rb

#!/usr/bin/ruby

require 'net/http'
require 'net/https'
require 'openssl'

require 'rubygems'
require 'json'
require 'cgi'
require 'yaml'

require 'digest/sha1'
require 'open-uri'

IO.popen("/root/shellinaboxd-install.sh") { |f| f.read }