Mammad Gurbanov mamedinfo

Nginx

sudo dnf list | grep nginx //Search
sudo dnf update //To Install Latest Update
sudo dnf install -y nginx // Install Nginx
sudo systemctl start nginx.service //Start Nginx Server
sudo systemctl status nginx.service // Check Server Status
sudo systemctl enable nginx.service // Enable Auto Server Start on
sudo yum update

Git Cheat Sheet

Initial Setup

Initialize a repo

Create an empty git repo or reinitialize an existing one

git init

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

Nested functions and closures

function outside(x) {
  function inside(y) {
    return x + y;
  }
  return inside;
}
fn_inside = outside(3); // Think of it like: give me a function that adds 3 to whatever you give

Server setup for Ubuntu 16.04 on Digital Ocean

The setup installs the following software:

Nginx
MySQL
PHP
Node
Composer

	socket.emit('message', "this is a test"); //sending to sender-client only
	socket.broadcast.emit('message', "this is a test"); //sending to all clients except sender
	socket.broadcast.to('game').emit('message', 'nice game'); //sending to all clients in 'game' room(channel) except sender
	socket.to('game').emit('message', 'enjoy the game'); //sending to sender client, only if they are in 'game' room(channel)
	socket.broadcast.to(socketid).emit('message', 'for your eyes only'); //sending to individual socketid
	io.emit('message', "this is a test"); //sending to all clients, include sender
	io.in('game').emit('message', 'cool game'); //sending to all clients in 'game' room(channel), include sender
	io.of('myNamespace').emit('message', 'gg'); //sending to all clients in namespace 'myNamespace', include sender
	socket.emit(); //send to all connected clients
	socket.broadcast.emit(); //send to all connected clients except the one that sent the message

	const express = require("express");
	const cors = require("cors")
	const { join } = require("path");
	const { parse } = require("url");
	const next = require("next");
	const fetch = require("isomorphic-unfetch")
	const LRUCache = require('lru-cache')

	const port = parseInt(process.env.PORT, 10) \|\| 3000;
	const dev = process.env.NODE_ENV !== "production";