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Install wkhtmltopdf on Ubuntu

This was tested on:

Ubuntu 14.04 x64
Ubuntu 16.04 x64

Installation

How to Install Wkhtmltopdf and Wkhtmltoimage in Ubuntu

wget http://download.gna.org/wkhtmltopdf/0.12/0.12.3/wkhtmltox-0.12.3_linux-generic-amd64.tar.xz
tar -xvf wkhtmltox-0.12.3_linux-generic-amd64.tar.xz
cd wkhtmltox/bin/
sudo mv wkhtmltopdf  /usr/bin/wkhtmltopdf
sudo mv wkhtmltoimage  /usr/bin/wkhtmltoimage

You can check here for getting the latest version. Change the wget url to download newer versions.

$ wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.4/wkhtmltox-0.12.4_linux-generic-amd64.tar.xz
$ tar -xvf wkhtmltox-0.12.4_linux-generic-amd64.tar.xz
$ cd wkhtmltox/bin/
$ sudo mv wkhtmltopdf /usr/bin/wkhtmltopdf
$ sudo mv wkhtmltoimage /usr/bin/wkhtmltoimage
$ sudo chmod a+x /usr/bin/wkhtmltopdf

Create box width and Height ratio Thank Nghiep, go to link

<!--- code HTML -->
<div class="constant-width-to-height-ratio"></div>

# Code CSS

	------------
	// app.js
	'use strict';
	// simple express server
	var express = require('express');
	var app = express();
	var router = express.Router();

	app.use(express.static('public'));
	app.get('/', function(req, res) {

	//PhantomJS http://phantomjs.org/ based web crawler Anton Ivanov anton.al.ivanov@gmail.com 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 = {};
	};

	/**
	* loadJSONP( url, hollaback [, context] ) -> Null
	* - url (String): URL to data resource.
	* - hollaback (Function): Function to call when data is successfully loaded,
	* it receives one argument: the data.
	* - context (Object): Context to invoke the hollaback function in.
	*
	* Load external data through a JSONP interface.
	*
	* ### Examples

	server {
	listen 80;
	listen [::]:80;

	server_name domain.com;

	return 301 https://$server_name;
	}

	server {

	// modules
	var redis = require('redis');
	var Step = require('step');

	// config file
	var config = require('config');

	// mysql client connect
	var mysql = require('mysql');
	var connection = mysql.createConnection({