Kianoosh Raika djKianoosh

#Unix Toolbox

This document is a collection of Unix/Linux/BSD commands and tasks which are useful for IT work or for advanced users. This is a practical guide with concise explanations, however the reader is supposed to know what s/he is doing.

##Unix Toolbox revision 14.4

The latest version of this document can be found at http://cb.vu/unixtoolbox.xhtml. Replace .xhtml on the link with .pdf for the PDF version and with .book.pdf for the booklet version. On a duplex printer the booklet will create a small book ready to bind. This XHTML page can be converted into a nice PDF document with a CSS3 compliant application (see the script example). See also the about page.
Error reports and comments are m

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

nest.js

A multi-level groupBy for arrays inspired by D3's nest operator.

Nesting allows elements in an array to be grouped into a hierarchical tree structure; think of it like the GROUP BY operator in SQL, except you can have multiple levels of grouping, and the resulting output is a tree rather than a flat table. The levels in the tree are specified by key functions.

See this fiddle for live demo.

Steps to Install Hubot in Slack using Heroku

Install Hubot locally
Install Slack Adapter
Configure integration on Slack
- Go to [your-slack].slack.com/services/new/hubot
Deploy to Heroku

If you want to rename the automatically generated heroku domain name:

	#!/bin/bash

	# Colors
	RED='\033[0;31m'
	GREEN='\033[0;32m'
	NO_COLOR='\033[0m'
	BLUE='\033[0;34m'
	YELLOW='\033[0;33m'
	NO_COLOR='\033[0m'

	Dear coworkers,

	Earlier this week Puerto Rico was hit by one of the most powerful hurricanes ever recorded in the Atlantic. The life and economic loss are expected to be massive. In most of the islands roads are either blocked or washed out, and the electricity and telecoms systems went down broadly.(In a personal note: <ADD SOMETHING ABOUT YOUR FAMILY OR FRIENDS IN THE ISLAND>).

	While it's still early to assess all damage, the early reports are incredibly awful. Much like the areas of US that were affected by Harvey and Irma, Maria will leave a painful scar. Electricity, food, & clean water will be scarce for months. Some areas will probably be completely disconnected from the outer world for a while.

	I share this with you so you can appreciate the gravity of the situation and ask you for your help.

	How to help:

	# app deps
	sudo yum install git

	# erlang deps
	sudo yum groupinstall "Development Tools"
	sudo yum install ncurses-devel

	# erlang
	wget http://www.erlang.org/download/otp_src_18.1.tar.gz
	tar -zxvf otp_src_18.1.tar.gz

	module {
	"name": "schema",
	"description": "JSON Schema Inference",
	"version": "0.0.3.1",
	"homepage": "https://gist.github.com/pkoppstein/a5abb4ebef3b0f72a6ed",
	"license": "MIT",
	"author": "pkoppstein at gmail dot com"
	};

	# NEWS:

	[Unit]
	Description=consul-template
	Requires=network-online.target
	After=network-online.target consul.service vault.service

	[Service]
	EnvironmentFile=-/etc/sysconfig/consul-template
	Restart=on-failure
	ExecStart=/usr/local/sbin/consul-template $OPTIONS -config=/etc/consul-template.d

	launchctl unload /Library/LaunchAgents/org.macosforge.xquartz.startx.plist
	sudo launchctl unload /Library/LaunchDaemons/org.macosforge.xquartz.privileged_startx.plist
	sudo rm -rf /opt/X11* /Library/Launch/org.macosforge.xquartz. /Applications/Utilities/XQuartz.app /etc/paths.d/XQuartz
	sudo pkgutil --forget org.macosforge.xquartz.pkg

	# Log out and log in