Dmitry Polushkin dmitry

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Location: https://github.com/wsargent/docker-cheat-sheet

Hi there!

The docker cheat sheet has moved to a Github project under https://github.com/wsargent/docker-cheat-sheet.

Please click on the link above to go to the cheat sheet.

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)

	# if you want to monkey patch every controller, put this in initializers/active_admin.rb
	ActiveAdmin::ResourceController.class_eval do
	include ActiveAdmin::CSVStream
	end

	# 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