Dmitry Polushkin dmitry

Deploy Rails 4 app with Dokku on DigitalOcean

Install dokku

First create a Ubuntu 13.04 x64 droplet on DigitalOcean Control Panel

Then ssh with root account, run this in termianl:

$ wget -qO- https://raw.github.com/progrium/dokku/master/bootstrap.sh | sudo bash

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

Rectifier

The diode bridge is the simplest rectifier I know.

Rectifier lets you share a directory with a docker container (just like $yourvm shared folders).

You don't have to install anything in your containers, and you only need to install diod in the host. diod is packaged on Ubuntu/Debian distros, and will automatically be apt-get install-ed if needed.

Since it uses diod to make a bridge, I called it rectifier. Yeah, that sucks, so if you have a better name, I'll steal it!

Capybara Cheat Sheet

View the original gist: https://gist.github.com/428105

Navigating

visit "/projects"
visit post_comments_path(post)

Clicking Links and Buttons

How Companies Communicated Being Hacked

Evernote

It’s probably a pretty bad idea to have your site go down, when people are supposed to read the blog post explaining the hack.

Twitter

Notice how another site reporting the hack received more attention than Twitter’s own announcement. Why was that?

	# vim: ft=sh

	from ubuntu:precise

	# change to fast mirror
	# run echo "deb http://archive.ubuntu.com/ubuntu precise main universe" > /etc/apt/sources.list
	run echo "deb http://ftp.neowiz.com/ubuntu precise main universe" > /etc/apt/sources.list

	# reduce output from debconf
	env DEBIAN_FRONTEND noninteractive

	Ctrl + A Go to the beginning of the line you are currently typing on
	Ctrl + E Go to the end of the line you are currently typing on
	Ctrl + L Clears the Screen, similar to the clear command
	Ctrl + U Clears the line before the cursor position. If you are at the end of the line, clears the entire line.
	Ctrl + H Same as backspace
	Ctrl + R Let’s you search through previously used commands
	Ctrl + C Kill whatever you are running
	Ctrl + D Exit the current shell
	Ctrl + Z Puts whatever you are running into a suspended background process. fg restores it.
	Ctrl + W Delete the word before the cursor

	class RBLineProfiler
	WALL_TIME_LIMIT = 10e3 # ms

	def initialize(app)
	@app = app
	end

	def call(env)
	result = nil
	profile = lineprof(/./) { result = @app.call(env) }

	#!/bin/sh

	# http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-ubuntu-via.html

	sudo add-apt-repository ppa:webupd8team/java
	sudo apt-get update
	sudo apt-get install oracle-java7-installer

	source 'https://rubygems.org'

	gem "method_source", "~> 0.8.1"