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Remove Duplicate Images from a Dataset

We will be using Python package imagededup to detect duplicate images.

There are multiple options (algorithms) for detecting duplicates.

• Convolutional Neural Network (CNN)
• Perceptual hashing (PHash)
• Difference hashing (DHash)
• Wavelet hashing (WHash)

HuakunShen

Browser Bookmark Shortcut

Browser allows you to run JavaScript by clicking on a bookmark prefilled with JS code.

Simply Create a new bookmark, give it any name, and input the js code in a special format in the URL input box.

Video Playback Rate

javascript: var v = v = document.querySelector("video"); var t = prompt('Set the playback rate'); v.playbackRate = parseFloat(t);;

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A simple Nginx Load Balancer implemented with 3 Nginx docker containers.

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GitHub OAuth 2.0 Web Flow

https://docs.github.com/en/developers/apps/building-oauth-apps/authorizing-oauth-apps#web-application-flow

This repo contains a simple web app demonstrating how GitHub OAuth App work in Web Flow.

The web server is written in Flask.

Make sure flask server is installed.

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GitHub OAuth 2.0 Device Flow

https://docs.github.com/en/developers/apps/building-oauth-apps/authorizing-oauth-apps#non-web-application-flow

Device Flow is for apps that cannot access a browser, such as a CLI app.

app.py is an python CLI console app that demonstrates how to do Device Flow OAuth.

To run it, you have to register a GitHub OAuth App.

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openvpn3 Usage

Install openvpn3 from this website.

If you look at the man page of openvpn3, there are 2 main concepts:

1. config: a configuration of vpn where you connects to
2. session: a vpn session

Config

Suppose you have a configuration file called vpn.ovpn that’s connecting to a server in New York.

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Option 1

Run this command on server

jupyter notebook --no-browser --ip <private ip> --port 8888

Access with http://<private ip>:8888

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package main

import (
	"encoding/hex"
	"fmt"
	"net"
	"strings"
)

func main() {

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Nginx host static files

server {
    listen 8080 default_server;
    listen [::]:8080 default_server;

    root /var/www/html;

 index index.html index.htm index.nginx-debian.html;

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HTTPS on Non-Default Port

Obtain an SSL certificate, https://zerossl.com/ is an option.

Get the following 3 files

• ca_bundle.crt
• certificate.crt
• private.key

Combine the certificates