Ishaan frikishaan

Github pages -> Amazon EC2 server

0) Login to the EC2 Amazon Console

https://console.aws.amazon.com/console/home

1) In the EC2's Security group section add an inbound rule to open ports `80` and `443`

Type: HTTP, Protocol: TCP, Port: 80, Source: 0.0.0.0/0
Type: HTTPS, Protocol: TCP, Port: 443, Source: 0.0.0.0/0

2) Copy the Public DNS for your EC2 instance

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

What's an Effective Engineer?

Not all random values are created equal - for security-related code, you need a specific kind of random value.

A summary of this article, if you don't want to read the entire thing:

Don't use Math.random(). There are extremely few cases where Math.random() is the right answer. Don't use it, unless you've read this entire article, and determined that it's necessary for your case.
Don't use crypto.getRandomBytes directly. While it's a CSPRNG, it's easy to bias the result when 'transforming' it, such that the output becomes more predictable.
If you want to generate random tokens or API keys: Use uuid, specifically the uuid.v4() method. Avoid node-uuid - it's not the same package, and doesn't produce reliably secure random values.
If you want to generate random numbers in a range: Use random-number-csprng.

You should seriously consider reading the entire article, though - it's

Revert the full commit

Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.

git revert {commit_id}

About History Rewriting

Delete the last commit

Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32:

$ git checkout --orphan NEWBRANCH
$ git rm -rf .

--orphan creates a new branch, but it starts without any commit. After running the above command you are on a new branch "NEWBRANCH", and the first commit you create from this state will start a new history without any ancestry.

You can then start adding files and commit them and they will live in their own branch. If you take a look at the log, you will see that it is isolated from the original log.

	/**
	* Lightweight script to detect whether the browser is running in Private mode.
	* @returns {Promise<boolean>}
	*
	* Live demo:
	* @see https://output.jsbin.com/tazuwif
	*
	* This snippet uses Promises. If you want to run it in old browsers, polyfill it:
	* @see https://cdn.jsdelivr.net/npm/es6-promise@4/dist/es6-promise.auto.min.js
	*

	# create a file C:\Users\[user]\.bashrc
	# add this content
	# add your onw aliases or changes these ones as you like
	# to make a dot (.bashrs) file in windows, create a file ".bashrs." (without extention) and save. windows will save it as ".bashrc"

	alias ls='ls -alh'
	alias cdnginx='cd /c/nginx && ls'
	alias cdmcga='cd /c/Users/[user]/sbox/node/mcga && ls'
	alias cdfood9='cd /c/Users/[user]/sbox/node/food9 && ls'
	alias cdmysql='cd /c/nginx/mysql/bin && ls'

	<?php

	class Math {

	/**
	* The base.
	*
	* @var string
	*/
	private static $base = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';