Zach Sim zach-sim-dc

A Short IPv6 Guide for Home IPv4 Admins

This guide is for homelab admins who understand IPv4s well but find setting up IPv6 hard or annoying because things work differently. In some ways, managing an IPv6 network can be simpler than IPv4, one just needs to learn some new concepts and discard some old ones.

Let’s begin.

First of all, there are some concepts that one must unlearn from ipv4:

Concept 1

Finicky Configuration Guide (v3 & v4)

Problem

When I click on links from Slack or Outlook on MacOS they open in seemingly random browser windows/profiles. This is annoying.

Solution

Open links in a particular Google Chrome profile window based on the source application or URL. Be less annoyed.

In Chrome, visit chrome://version and find the desired profile name. Mine was Default. Copy that profile's directory name, like Profile 2 or Default, not the profile's vanity name you see when you click on your profile icon in the browser.
Install Finicky: brew install finicky. After install it should be running and you should see the icon in the upper toolbar.
From the Finicky Toolbar Item, click > Config > Create New (or edit ~/.finicky.js / ~/.finicky.ts).

Version 4 (TypeScript)

Think twice before abandoning X11. Wayland breaks everything!

Wayland breaks everything! It is binary incompatible, provides no clear transition path with 1:1 replacements for everything in X11, and is even philosophically incompatible with X11. Hence, if you are interested in existing applications to "just work" without the need for adjustments, then you may be better off avoiding Wayland.

Wayland solves no issues I have but breaks almost everything I need. Even the most basic, most simple things (like xkill) - in this case with no obvious replacement. And usually it stays broken, because the Wayland folks mostly seem to care about Automotive, Gnome, maybe KDE - and alienating everyone else (e.g., people using just an X11 window manager or something like GNUstep) in the process.

Feature comparison

Using gitqlite, query for percentage of commit count by author (in this case in facebook/react). Limit to top 25, include a "chart"

I had a large dataset in postgis and wanted to avoid the hassle of first exporting it to a several GB geojson file before tiling it with Tippecanoe.

ogr2ogr -f GeoJSON /dev/stdout \                                                                            
PG:"host=localhost dbname=postgres user=postgres password=thepassword" \
-sql "select * from a, roi where a.geom && roi.geom" \
| docker run -i -v ${PWD}:/data tippecanoe:latest tippecanoe \
--output=/data/yourtiles.mbtiles

	const { execSync } = require('child_process')
	const { createHash } = require('crypto')
	const invertColor = require('invert-color')

	const branchName = execSync('git rev-parse --abbrev-ref HEAD')
	const hash = createHash('sha256')
	hash.update(branchName)
	const color = '#' + hash.digest().toString('hex').substring(0, 6)
	const invertedColor = invertColor(color, true)

	package main

	import (
	"context"
	"flag"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"

	# Instead of loading all of Rails, load the
	# particular Rails dependencies we need
	require 'sqlite3'
	require 'active_record'

	# Set up a database that resides in RAM
	ActiveRecord::Base.establish_connection(
	adapter: 'sqlite3',
	database: ':memory:'
	)

	/* global gapi */

	const API_KEY = 'YOURAPIKEYHERE';

	import React, { Component } from 'react';

	class App extends Component {

	loadYoutubeApi() {
	const script = document.createElement("script");

	# Gemfile
	gem 'aws-sdk-s3'