netstat

sudo netstat -tunlp

-t - Show TCP ports.
-u - Show UDP ports.
-n - Show numerical addresses instead of resolving hosts.
-l - Show only listening ports.
-p - Show the PID and name of the listener’s process. This information is shown only if you run the command as root or sudo user.

ss

sudo ss -tunlp

ss is new netstat. It lacks some of the netstat features but exposes more TCP states and it is slightly faster.

lsof

sudo lsof -nP -iTCP -sTCP:LISTEN
# or
sudo lsof -i tcp:80 -n -P

lsof is a powerful command-line utility that provides information about files opened by processes.

-n - Do not convert port numbers to port names.
-p - Do not resolve hostnames, show numerical addresses.
-iTCP -sTCP:LISTEN - Show only network files with TCP state LISTEN.

article

Articles

• ⤴ Add state and life-cycle methods to Function Components
• ⤴ Create a Custom useFetch() React Hook - code
• ⤴ 10 React Hooks you Should Have in Your Toolbox
• ⤴ Application store with Hooks & Context - code

Videos

• ⤴ Here's How to Use React Hooks with Redux - code
• ⤴ Academind - React Hooks Crash Course
• ⤴ Cancelling an Axios request in a useEffect hook
• ⤴ Hooks Change The Way We Build Forms - code

Courses

• ⤴ Pluralsight - Building Apps with React and Redux - files

Code Examples

• ⤴ React Router
• ⤴ Minimal Webpack configuration for React app
• ⤴ Redux Basic Example

• ⤴ Awesome Vue.js - A curated list of awesome things related to Vue.js.
• ⤴ Vue 3 State Management Guide

• jorgebucaran/hyperapp
• docs
• sandbox

import { h, app } from "hyperapp";

// State init
const initialState = {
  counter: 0,
  text: "yo!"
};

const ResetState = () => {
  return {
    ...initialState
  };
};

// Action example
const Increment = state => {
  return {
    ...state,
    counter: ++state.counter
  };
};

// Component example
const LineSpace = () => h("div", { class: "line-space" });

// hyperapp init
app({
  init: { ...initialState },
  view: state => {
    return h("div", {}, [
      h("p", {}, `Now is ${state.counter}`),
      LineSpace(),
      h("button", { onClick: Increment }, "+"),
      h("p", {}, ` text: ${state.text}`),
      LineSpace(),
      h("button", { onClick: ResetState }, "Reset")
    ]);
  },
  node: document.getElementById("app")
});

Security - the elephant in the room. Everyone agrees that it is very important but few takes it seriously. We at RisingStack want you to do it right - this is why we have put together this checklist to help you guide through the must have security checks before your application is enabled to thousands of users/customers.

node-js-security-checklist

NPM Packages:

• ratelimiter