Alireza Davoodi alizdavoodi

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

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.

ipvtap over wifi for libvirt

ipvtap is similar to macvtap, but works over wifi too, since it uses the same mac address as the wifi interface.

libvirt doesn't support ipvtap, so we have to configure everything manually. Important data we need before we start:

the name of the wifi interface, wlan0 in my case (it's already connected - use NM or networkd+iwd).
the mac address of the wifi interface (it must be the same in the guest too)

On the host:

Initial checks

Start by checking that there aren't any previous ssh keys inside the FIDO2 authenticator of your YubiKey. You can check if they exist by running the command below:

nix shell nixpkgs#yubikey-manager -c ykman fido credentials list

If the command above outputs a string mentioning "ssh" or "openssh", then you have already got a key generated and store on your YubiKey.

Evaluating additional authentication factors

Before generating a new ssh key to store on your YubiKey you must consider which additional required authentication factors you want to use. Below you can see a table with the available factors and their corresponding command:

	//PhantomJS http://phantomjs.org/ based web crawler Anton Ivanov [email protected] 2012
	//UPDATE: This gist has been made into a Node.js module and now can be installed with "npm install js-crawler"
	//the Node.js version does not use Phantom.JS, but the API available to the client is similar to the present gist

	(function(host) {

	function Crawler() {
	this.visitedURLs = {};
	};

	// Promise.all is good for executing many promises at once
	Promise.all([
	promise1,
	promise2
	]);

	// Promise.resolve is good for wrapping synchronous code
	Promise.resolve().then(function () {
	if (somethingIsNotRight()) {
	throw new Error("I will be rejected asynchronously!");

	Configuration
	=============
	Node 1 :
	[mysqld]
	basedir=/home/nirbhay/project/git-repo/maria/10.1/install
	datadir=/home/nirbhay/project/git-repo/maria/10.1/install/data1

	log-bin
	log-slave-updates
	binlog_format=row

	batchFindAll = (model,where,cback,size=10)->
	model.count({where})
	.then (res)=>
	total = res
	[0..Math.floor(total/size)].reduce (curr,num)=>
	count = num*10
	curr.then => cback(where,count,size)
	,Promise.resolve()

	<?php

	namespace App\Providers;

	use Illuminate\Support\ServiceProvider;

	use Aws\S3\S3Client;
	use League\Flysystem\AwsS3v3\AwsS3Adapter;
	use League\Flysystem\Filesystem;
	use Storage;

	#!/bin/bash

	rm -rf /home/yen3/ubuntu.qcow2
	qemu-img create -f qcow2 /home/yen3/ubuntu.qcow2 10G

	virsh undefine ubuntu1604arm64 --nvram

	install_from_localtion() {
	virt-install -n ubuntu1604arm64 --memory 1024 --arch aarch64 --vcpus 1 \
	--disk /home/yen3/ubuntu.qcow2,device=disk,bus=virtio \