alexanderadam

#!/bin/sh

# qemu-img create -f qcow2 mac_hdd.img 64G
# echo 1 > /sys/module/kvm/parameters/ignore_msrs
#
# Type the following after boot,
# -v "KernelBooter_kexts"="Yes" "CsrActiveConfig"="103"
#
# printf 'DE:AD:BE:EF:%02X:%02X\n' $((RANDOM%256)) $((RANDOM%256))
#

alexanderadam

---
layout: page
title: debug
permalink: /debug
---

<div id="jekyll-debug"></div>

<script>
  var debugDiv = document.getElementById('jekyll-debug');

alexanderadam

#!/usr/bin/env ruby

# set env variables GITHUB_USER and GITHUB_PASS

require 'bundler/inline'
gemfile do
  source 'https://rubygems.org'
  gem 'ferrum'
end

alexanderadam

FROM golang:1.14-alpine
COPY . /go/src/app
WORKDIR /go/src/app
RUN go get -v -d
RUN go install
CMD ["app"]

alexanderadam

def alert(color=:default, message)
  colors = {default: 0, black: 30, red: 31, green: 32, orange: 33, blue: 34, magenta: 35, teal: 36, white: 37}
  $stdout.puts "----\e[#{colors[color]}m#{message}\e[0m----"
end

alert :red, 'before all tests'
at_exit { alert :red, 'after all tests' }

require 'minitest/autorun'

alexanderadam

* Shows a message while asserting like: 

ok: [host] => {                  
    "msg": "disk usage 4.2B of total 20.0GB (21.0%) (should exceed limit 90.0%)"
}

* Note this only looks at first mount point on current node
* Fails if disk is near-full
* Last step pushes to a push-based monitoring service, which will alert us if it doesn't get there after some time
* Need to setup a  variable `disk_limit`, which is the max acceptable usage ratio, e.g. set it to 0.8 if you want to keep disks within 80% of max size

alexanderadam

namespace :optimization do
  desc "Provide DB vacuum for production environment"
  task :vacuum => :environment do
    begin
      tables = ActiveRecord::Base.connection.tables
      tables.each do |table|
        ActiveRecord::Base.connection.execute("VACUUM FULL ANALYZE #{table};")
      end
    rescue Exception => exc
      Rails.logger.error("Database VACUUM error: #{exc.message}")

alexanderadam

EasterHegg 18 Workshop: Smart Contracts on Ethereum

Requirements:

• Chrome/ium or Firefox
• Metamask

Coding your first smart contract!

a. Setting up Metamask

alexanderadam

#!/bin/sh
# put this file in /etc/network/if-up.d/
if iwconfig wlp4s0 | grep -c "ESSID:\"WIFIonICE\""
then
    curl -s "https://www.ombord.info/hotspot/hotspot.cgi?connect=&method=login&realm=db_advanced_wifi"
fi

alexanderadam

// Sometimes it's necessary to do a bit of clean-up
Array.prototype.forEach.call(document.querySelectorAll('.js-comment-delete button'), function(el, i) {
  el.removeAttribute('data-confirm');
  el.click();
});