Ninh Pham ReeganExE

IP Tables (iptables) Cheat Sheet

IPTables is the Firewall service that is available in a lot of different Linux Distributions. While modifiying it might seem daunting at first, this Cheat Sheet should be able to show you just how easy it is to use and how quickly you can be on your way mucking around with your firewall.

Resources

The following list is a great set of documentation for iptables. I used them to compile this documentation.

How-To Geek: The Beginner’s Guide to iptables, the Linux Firewall: https://www.howtogeek.com/177621/the-beginners-guide-to-iptables-the-linux-firewall/
IPTables Essentials: Common Firewall Rules and COmmands https://www.digitalocean.com/community/tutorials/iptables-essentials-common-firewall-rules-and-commands

What is React Fiber? And how can I try it out today?

what?

React Fiber is an ongoing reimplementation of React's core algorithm. It is the culmination of over two years of research by the React team.

why?

Terminology

View: Also called a "template", a file that contains markup (like HTML) and optionally additional instructions on how to generate snippets of HTML, such as text interpolation, loops, conditionals, includes, and so on.
View engine: Also called a "template library" or "templater", ie. a library that implements view functionality, and potentially also a custom language for specifying it (like Pug does).
HTML templater: A template library that's designed specifically for generating HTML. It understands document structure and thus can provide useful advanced tools like mixins, as well as more secure output escaping (since it can determine the right escaping approach from the context in which a value is used), but it also means that the templater is not useful for anything other than HTML.
String-based templater: A template library that implements templating logic, but that has no understanding of the content it is generating - it simply concatenates together strings, potenti

	MIT License

	Copyright (c) 2020 Rithvik Vibhu

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is
	furnished to do so, subject to the following conditions:

	package main
	import "fmt"
	func main() {
	fmt.Println("hello world")
	}

	/**
	* Cryptography Functions
	*
	* Forked from AndiDittrich/AesUtil.js
	* https://gist.github.com/AndiDittrich/4629e7db04819244e843
	*/

	import crypto, { CipherGCM, CipherGCMTypes, DecipherGCM } from 'crypto';
	import { Password } from './types';

	package ciphers

	import (
	"crypto/rand"
	"crypto/rsa"
	"crypto/sha512"
	"crypto/x509"
	"encoding/pem"
	"log"
	)

	{
	"version": "0.2.0",
	"configurations": [
	{
	"name": "Example",
	"type": "node",
	"request": "launch",
	"runtimeExecutable": "node",
	"runtimeArgs": ["--nolazy", "-r", "ts-node/register/transpile-only"],

	#!/bin/sh
	#http://www.thegeekstuff.com/2011/01/advanced-regular-expressions-in-grep-command-with-10-examples-%E2%80%93-part-ii/


	# GENERAL
	# print lines begining with range of letters
	grep ^[A-D] table.txt


	# REGEX

	'use strict';

	const crypto = require('crypto');

	const ENCRYPTION_KEY = process.env.ENCRYPTION_KEY; // Must be 256 bits (32 characters)
	const IV_LENGTH = 16; // For AES, this is always 16

	function encrypt(text) {
	let iv = crypto.randomBytes(IV_LENGTH);
	let cipher = crypto.createCipheriv('aes-256-cbc', Buffer.from(ENCRYPTION_KEY), iv);