Luke Chang changx03

How to install OpenCV 4.2.0 with CUDA 10.0 in Ubuntu distro 18.04

First of all install update and upgrade your system:

    $ sudo apt update
    $ sudo apt upgrade

Then, install required libraries:

(wherever it says url.com, use your server's domain or IP)

Login to new server as root, then add a deploy user

sudo useradd --create-home -s /bin/bash deploy
sudo adduser deploy sudo
sudo passwd deploy

And Update the new password

###Let's install Vagrant###

Install VirtualBox: https://www.virtualbox.org/
Install Vagrant: http://vagrantup.com/

###Select a Vagrant Box from https://vagrantcloud.com###

#add it to your list of boxes
vagrant box add hashicorp/precise32
#create a new folder for your project &amp; init vagrant

Here's all you have to do to add clustering to your node.js application.

save this code as cluster.js, and run cluster.js instead of server.js (or /bin/www, or whatever it's called for your project)
the only line you'll need to change is the last line - it needs to point to the location of your server.js file

var cluster = require('cluster');

if (cluster.isMaster) {
  // Count the machine's CPUs
 var cpuCount = require('os').cpus().length;

Deploying a node app with Forever is great...until your server restarts unexpectedly. Then your app stops running and you have to re-deploy.

To get around this, we're going to run our node app as an Upstart service. Upstart services are great, because, once started, the system auto-restarts them if they fail, or if the server restarts.

###Step 1: Create a service for your node app

ssh in as root ssh root@youripaddress
Create a node-app.conf file in /etc/init
IMPORTANT: whatever filename you pick is what you will use to start|stop|restart your service i.e. service node-app start

##Setup your server (this would ideally be done with automated provisioning)

add a deploy user with password-less ssh see this gist
install forever npm install -g forever

##Install flightplan

npm install -g flightplan
in your project folder npm install flightplan --save-dev
create a flightplan.js file

	upstream project {
	server 22.22.22.2:3000;
	server 22.22.22.3:3000;
	server 22.22.22.5:3000;
	}

	server {
	listen 80;

	location / {