kidlab

<a href="http://en.wikipedia.org/wiki/Lsof">lsof</a>
----

show open files

lsof -nPp <pid>

<a href="http://linux.die.net/man/1/strace">strace</a>
------

kidlab

begin
  require 'bundler/inline'
rescue LoadError => e
  $stderr.puts 'Bundler version 1.10 or later is required. Please update your Bundler'
  raise e
end

gemfile(true) do
  source 'https://rubygems.org'
  gem 'activerecord', '4.2.4'

kidlab

Installing a Gem on Heroku from a Private GitHub Repo

Sometimes you want to use a gem on Heroku that is in a private repository on GitHub.

Using git over http you can authenticate to GitHub using basic authentication. However, we don't want to embed usernames and passwords in Gemfiles. Instead, we can use authentication tokens.

1. Get an OAuth Token from GitHub

---

First you will need to get an OAuth Token from GitHub using your own username and "note"