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Installing OpenSSH 7.4 on Ubuntu 16.04

sudo apt install -y build-essential libssl-dev zlib1g-dev
wget "http://mirrors.evowise.com/pub/OpenBSD/OpenSSH/portable/openssh-7.4p1.tar.gz"
tar xfz openssh-7.4p1.tar.gz
cd openssh-7.4p1
./configure
make
sudo make install

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require 'yaml'
require 'json'
require 'bundler/inline'

gemfile _install=true do
  source 'https://rubygems.org'

  gem 'pry'
  gem 'puma'
  gem 'sinatra', require: 'sinatra/base'

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module Docs
  def self.extended(version)
    version.include Swagger::Blocks
  end
 
  def root
    Swagger::Blocks.build_root_json [self]
  end

  concerning :App do

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# Usually normalization is performed during `before_validation`
# or in a setter. But neither would help with normalization of
# where conditions.
#
# This will add `normalize` to ActiveRecord with support for
# where conditions. For example,
#
#   class User
#     normalize(:email) { email.downcase }
#   end

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# This class is used to render jbuilder templates in grape.
#
# There is an existing grape-jbuilder gem but it depends
# on tilt-jbuilder gem which
# - does not support partial! with :collection
# - does not support template compilation
#
# In constrast this template handler supports all features of jbuilder
# and uses template compilation (5x-10x times faster than without).
class Tilt::Jbuilder < Tilt::Template

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Gem::Specification.new do |s|
  s.name         = 'docs'
  s.version      = '0.0.1'
 
  s.files        = ['docs.rb']
  s.require_path = '.'
 
  s.add_dependency('swagger-ui_rails', ">= 2.1.0.alpha.7.1")
end

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require 'fiddle'
A = Class.new
B = Class.new
C = Class.new A

p C.superclass # => A
(Fiddle::Pointer[Fiddle.dlwrap C] + 16)[0, 8] = Fiddle::Pointer[Fiddle.dlwrap B].ref
p C.superclass # => B

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def method_calls(detailed: false, thread: nil)
  [].tap do |log|
    ident = -1
    trace = TracePoint.new(:call, :return, :c_call, :c_return) do |tp|
      break if thread and thread != Thread.current

      case tp.event
      when :call, :c_call
        if tp.event == :call or detailed
          ident += 1

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# rails 3.X patch to remove extra allocations on field access
module ActiveRecord::AttributeMethods::Read::ClassMethods
  def internal_attribute_access_code(attr_name, cast_code)
    access_code = "(v=@attributes[attr_name]) && #{cast_code}"

    unless attr_name == primary_key
      access_code.insert(0, "missing_attribute(attr_name, caller) unless @attributes.has_key?(attr_name); ")
    end

    if cache_attribute?(attr_name)

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def track_sql(&block)
  timing = Hash.new 0
  track = ->(_,start,finish,_,data) do
    Thread.exclusive do
      timing[data[:name]] += (finish - start)
    end
  end

  ActiveSupport::Notifications.subscribed(track, 'sql.active_record', &block)
  timing