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#!/usr/bin/env ruby

# Dump firmware from nrf51 and maybe other cortex-m devices
# The script thats missing from http://blog.includesecurity.com/2015/11/NordicSemi-ARM-SoC-Firmware-dumping-technique.html
# Also inspired by https://tasteless.eu/post/2015/12/32c3ctf-emb400/
# Requires seperate instace gdb server already running, for my jlink I use 
# openocd -f interface/jlink.cfg -c "adapter_khz 2000; transport select swd;" -f target/nrf51.cfg

# uicr and ficr are always accessible so you might want to dump those externally and compare?
# openocd -f interface/jlink.cfg -c "adapter_khz 2000; transport select swd; set WORKAREASIZE 0;" -f target/nrf51.cfg -c "init; reset halt; flash read_bank 1 uicr-normal.bin 0x0 0x100; exit"

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# Capistrano 3.x Vagrant stage
# config/deploy/vagrant.rb

set :stage, :vagrant
set :rails_env, "production"

vagrant_ssh_config = `vagrant ssh-config`.split("\n")[1..-1].map(&:strip).inject({}) do |m, s|
  k, v = s.split(/\s/, 2).map(&:strip); m[k] = v; m
end

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// String utils
//
// resources:
//  -- mout, https://github.com/mout/mout/tree/master/src/string

/**
 * "Safer" String.toLowerCase()
 */
function lowerCase(str){
  return str.toLowerCase();

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Instructions

CloudFlare is an awesome reverse cache proxy and CDN that provides DNS, free HTTPS (TLS) support, best-in-class performance settings (gzip, SDCH, HTTP/2, sane Cache-Control and E-Tag headers, etc.), minification, etc.

1. Make sure you have registered a domain name.
2. Sign up for CloudFlare and create an account for your domain.
3. In your domain registrar's admin panel, point the nameservers to CloudFlare's (refer to this awesome list of links for instructions for various registrars).
4. From the CloudFlare settings for that domain, enable HTTPS/SSL and set up a Page Rule to force HTTPS redirects. (If you want to get fancy, you can also enable automatic minification for text-based assets [HTML/CSS/JS/SVG/etc.], which is a pretty cool feature if you don't want already have a build step for minification.)
5. If you

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Let's say you're using Ubuntu 13.04 (Raring Ringtail, released in April 2013) and it just went End-of-Life on you, because it's supported for only 6 months, and the deprecated packages are taken down after 12 months.

You'll probably figure this out the hard way. When you run sudo apt-get update, it will eventually report these errors:

Ign http://archive.ubuntu.com raring-updates/universe Sources/DiffIndex
Err http://security.ubuntu.com raring-security/main Sources
  404  Not Found [IP: 91.189.91.15 80]
Err http://security.ubuntu.com raring-security/universe Sources
  404  Not Found [IP: 91.189.91.15 80]

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# perform a fresh install of Ubuntu 17.10

# upgrade the kernel to v4.13.10
mkdir ~/kernel-v4.13.10
cd ~/kernel-v4.13.10
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13.10/linux-headers-4.13.10-041310_4.13.10-041310.201710270531_all.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13.10/linux-headers-4.13.10-041310-generic_4.13.10-041310.201710270531_amd64.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13.10/linux-image-4.13.10-041310-generic_4.13.10-041310.201710270531_amd64.deb
sudo dpkg -i *.deb

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// Place user-specific overrides in this file, to ensure they're preserved
// when upgrading
{
  "folder_exclude_patterns": [".svn", ".git", ".hg", "CVS", "node_modules"]
}

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#!/bin/bash
sudo apt-get install xserver-xorg xserver-xorg-core x11-apps x11-xserver-utils

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# This is an example resource file for rTorrent. Copy to
# ~/.rtorrent.rc and enable/modify the options as needed. Remember to
# uncomment the options you wish to enable.

# Maximum and minimum number of peers to connect to per torrent.
min_peers = 1
max_peers = 100

# Same as above but for seeding completed torrents (-1 = same as downloading)

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To Design or Not To Design? A Third Good Question

Following my earlier discussions of testing and defect fixing, I’ll complete the trilogy by discussing the role of design early in projects. Recall the context: projects that have validated a genuine need by haven’t validated an economic proposition. Because of the uncertainties of such a situation, iteration is inevitable. Piloting a project on the runway you will like have to try many experiments to find value customers will buy. Capital efficiency while iterating extends the lifespan of the project and increases its chances of success. The more experiments you can perform per dollar, the higher your expected return.

Review

In the sibling essays to this one I argued that the Extreme Programming principles of Test Until Bored and Defects Zero were perfectly appropriate to the cruise phase of a product, where the business driver is increasing profit by lowering cost. These principles also serve to prepare the software to act as a platform from which to