Róbert Oroszi oroce

Deploy your own PaaS!

Setting up Dokku with DigitalOcean and Namecheap

..or how I made my own heroku in a few hours for $3.98.

This write-up is several years out of date! You probably shouldn't use it.

WARNING

These packages are obsolete! Please use the official packages from http://www.Graylog2.org

=================================================

Distributed database with content-addressable values
Node types are blobs and trees.
Hashes use a secure hash (not sha1) since distributed p2p systems contain many untrusted nodes. (Or we could let security be a concern of a higher-level and just use this for the hard network scale problem)
The actual named refs can still be in a central server with user authorization. Making that secure in a distributed system is considerably harder.

For example, suppose I wanted to download the package foo at the version ~0.2.3. My package client would go to the central ref server and query the tags of foo. It would then see that foo has versions 0.2.3, 0.2.4, and 0.3.0. It would decide that 0.2.4 is the desired version based on the original range query. Along with the refs the central server also told it the hashes of the root tree node for these package versions. It now knows which hash contains the desired package.

Now to get the package, we need to query the distributed network for t

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

The prep-script.sh will setup the latest Node and install the latest perf version on your Linux box.

When you want to generate the flame graph, run the following (folder locations taken from install script):

sudo sysctl kernel.kptr_restrict=0
# May also have to do the following:
# (additional reading http://unix.stackexchange.com/questions/14227/do-i-need-root-admin-permissions-to-run-userspace-perf-tool-perf-events-ar )
sudo sysctl kernel.perf_event_paranoid=0

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!

\

JSConf Slides, Codes and Notes

These are all the JSConf 2014 slides, codes, and notes I was able to cull together from twitter. Thanks to the speakers who posted them and thanks to @chantastic for posting his wonderful notes.

	Steps to get Raspberry Pi running with Mopidy and Spotify

	1. Raspian Wheezy Installation
	2. Install Python tools following these instructions
	(had to run most of it as sudo):
	http://raspberry.io/wiki/how-to-get-python-on-your-raspberrypi/
	3. Install Spotify libspotify
	https://developer.spotify.com/technologies/libspotify/#download
	4. Install Mopidy following these directions:
	http://docs.mopidy.com/en/latest/installation/raspberrypi/

	var _log = console.log;

	window.console.log = function(log){
	_log.call(console, log.reverse ? log.reverse() : typeof log === 'string' ? log.split('').reverse().join('') : typeof log === 'number' ? log.toString().split('').reverse().join('') : typeof log === 'boolean' ? !log : log);
	};

	sub crappy_async_lwp($host, $path) {
	my $p = Promise.new;
	my $v = $p.vow;
	IO::Socket::Async.connect($host, 80).then(-> $sr {
	if $sr.status == Kept {
	my $socket = $sr.result;
	$socket.send("GET $path\r\n\r\n").then(-> $wr {
	if $wr.status == Broken {
	$v.break($wr.cause);
	$socket.close();