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Raspberry Pi 4 arm64 + Docker + Portainer on USB3 storage

assume that /dev/sda1 is USB3 storage

Install docker and stop daemon

curl -sSL https://get.docker.com | sh
usermod -aG docker pi
service docker stop

Using a rotary encoder as a volume control

On my RetroPie machine I wanted a hardware volume knob — the games I play use a handful of emulators, and there's no unified software interface for controlling the volume. The speakers I got for my cabinet are great, but don't have their own hardware volume knob. So with a bunch of googling and trial and error, I figured out what I need to pull this off: a rotary encoder and a daemon that listens for the signals it sends.

Rotary encoder

A rotary encoder is like the standard potentiometer (i.e., analog volume knob) we all know, except (a) you can keep turning it in either direction for as long as you want, and thus (b) it talks to the RPi differently than a potentiometer would.

I picked up this one from Adafruit, but there are plenty others available. This rotary encoder also lets you push the knob in and treats that like a button press, so I figured that would be useful for toggling mute on and off.

Backup

Copy both id_rsa and id_rsa.pub from ~/.ssh/ to a USB drive. Identify the private key by executing the following command.
```
gpg --list-secret-keys --keyid-format LONG
```

It will show something similar to this.

sec   4096R/3AA5C34371567BD2 2016-03-10 [expires: 2017-03-10]

Setup multiple git identities & git user informations

/!\ Be very carrefull in your setup : any misconfiguration make all the git config to fail silently ! Go trought this guide step by step and it should be fine 😉

Setup multiple git ssh identities for git

Generate your SSH keys as per your git provider documentation.
Add each public SSH keys to your git providers acounts.
In your ~/.ssh/config, set each ssh key for each repository as in this exemple:

-<?php
-// First, add the top-level menu page
-// This adds the same link to the submenu when there are other submenu pages registered underneath it.
-add_menu_page( esc_html__( 'Top Page', 'text-domain' ), esc_html__( 'Top Page', 'text-domain' ), 'manage_options', 'slug', 'callback', 'icon' );
-// We don't need to have a link for the parent in the submenu, so this overwrites it
-// However, this will leave an empty link item that's still visible due to padding
-add_submenu_page( 'slug', '', '', 'manage_options', 'slug', 'callback' );

	// String utils
	//
	// resources:
	// -- mout, https://github.com/mout/mout/tree/master/src/string

	/**
	* "Safer" String.toLowerCase()
	*/
	function lowerCase(str) {
	return str.toLowerCase();

	<#
	.SYNOPSIS
	Script to Initialize my custom powershell setup.
	.DESCRIPTION
	Script uses scoop
	.NOTES
	NOTE Will configure the Execution Policy for the "CurrentUser" to Unrestricted.

	Author: Mike Pruett
	Date: October 18th, 2018

	#!/usr/bin/env bash

	pid=$(pgrep gammastep)

	if [[ $1 = "toggle" ]]; then
	if pgrep -x "gammastep" > /dev/null; then
	kill -9 $(pgrep -x "gammastep");
	else
	gammastep -O ${GAMMASTEP_NIGHT:-3500} &
	fi

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Z-Index Example</title>
	<style>
	@font-face {
	font-family: 'Win95F';
	src: url('data:application/font-woff2;base64,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

	import React, { useState, useRef, useEffect } from 'react';
	import './App.css';
	import RecordRTC, { invokeSaveAsDialog } from 'recordrtc';

	function App() {
	const [stream, setStream] = useState(null);
	const [blob, setBlob] = useState(null);
	const refVideo = useRef(null);
	const recorderRef = useRef(null);