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@sm-Fifteen
sm-Fifteen / whats_a_yubikey.md
Last active December 9, 2025 20:29
"What the heck is a Yubikey and why did I buy one?": A user guide

"What the heck is a Yubikey and why did I buy one?": A user guide

(EDIT: Besides Reddit, I've also put this up on Github Gist)

So while looking for information on security keys before getting one myself, I got very confused reading about all the different modes and advertised features of Yubikeys and other similar dongles. The official documentation tends to be surprisingly convoluted at times, weirdly organized and oddly shy about a few of the limitations of these keys (which I'm making a point of putting front and center). Now that I have one, I decided to write down everything I figured out in order to help myself (and hopefully some other people reading this) make sense of all this.

Since I'm partly writing these notes for myself, there might be some back and forth between "exp

@sbyx
sbyx / low-battery-level-detection-notification-for-all-battery-sensors.yaml
Last active December 8, 2025 08:06
Home Assistant Blueprint: Low battery level detection & notification for all battery sensors
blueprint:
name: Low battery level detection & notification for all battery sensors
description: Regularly test all sensors with 'battery' device-class for crossing
a certain battery level threshold and if so execute an action.
domain: automation
input:
threshold:
name: Battery warning level threshold
description: Battery sensors below threshold are assumed to be low-battery (as
well as binary battery sensors with value 'on').
@GermaniumSystem
GermaniumSystem / pwnagotchi notes
Last active July 14, 2025 06:13
How to set up a pwnagotchi in 25* simple steps.
Preface:
I have no idea if any of this is the "right" way of doing it. This is just how I got my unit working.
Good luck.
WARNING: Do not use a V1 Waveshare display module with a stock pwnagotchi! The pwnagotchi expects a V2 module, and may irreparably damage a V1 module!
A V1 display module *can* work, but you must modify `waveshare.py` and `display.py` beforehand. For the time being, this is left as an exercise for the reader.
If you have already burnt a V1 display, try disconnecting it from the Pi and leaving it overnight. This may rejuvenate the display somewhat, but it will likely still display signs of damage.
Installation:
1. `dd` Raspbian Lite to an SD card.
@carlosedp
carlosedp / gist:4df3cd58a489a3c4022f97a474439b90
Created February 21, 2018 16:25
Rock64 Install (Adjust IPs/Hostnames/DNS to your deployment)
# Rock64 Install (Adjust IPs/Hostnames/DNS to your deployment)
Disable NetworkManager and DHCP Client
sudo systemctl stop dhcpcd
sudo systemctl stop NetworkManager
sudo systemctl disable dhcpcd
sudo systemctl disable NetworkManager
sudo systemctl daemon-reload
@chadmayfield
chadmayfield / hashcat_macos.sh
Created June 2, 2017 17:24
Install Hashcat on macOS
#!/bin/bash
git clone https://github.com/hashcat/hashcat.git
mkdir -p hashcat/deps
git clone https://github.com/KhronosGroup/OpenCL-Headers.git hashcat/deps/OpenCL
cd hashcat/ && make
./hashcat --version
./hashcat -b -D 1,2
./example0.sh

Install dlib and face_recognition on a Raspberry Pi

Instructions tested with a Raspberry Pi 2 with an 8GB memory card. Probably also works fine on a Raspberry Pi 3.

Steps

Download the latest Raspbian Jessie Light image. Earlier versions of Raspbian won't work.

Write it to a memory card using Etcher, put the memory card in the RPi and boot it up.

@jkubecki
jkubecki / ExportKindle.js
Last active November 17, 2025 22:39
Amazon Kindle Export
// The following data should be run in the console while viewing the page https://read.amazon.com/
// It will export a CSV file called "download" which can (and should) be renamed with a .csv extension
var db = openDatabase('K4W', '3', 'thedatabase', 1024 * 1024);
getAmazonCsv = function() {
// Set header for CSV export line - change this if you change the fields used
var csvData = "ASIN,Title,Authors,PurchaseDate\n";
db.transaction(function(tx) {
@hayd
hayd / sns-to-slack.py
Created May 5, 2016 06:47
sns to slack aws lambda python
#!/usr/bin/env python
# -*- coding: utf-8 -*-
'''
Follow these steps to configure the webhook in Slack:
1. Navigate to https://<your-team-domain>.slack.com/services/new
2. Search for and select "Incoming WebHooks".
@Kartones
Kartones / postgres-cheatsheet.md
Last active December 9, 2025 11:10
PostgreSQL command line cheatsheet

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

  • -E: will describe the underlaying queries of the \ commands (cool for learning!)
  • -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)