mmeyer2k

zfs cheatsheet

vdevs

Create zpool with initial vdev

zpool create poolX mirror /dev/sdY /dev/sdZ

Add vdev to zpool

zpool add poolX mirror /dev/sdY /dev/sdZ

Create a docker based PiHole server that writes only to memory.

Features

fully supports ipv6
portable and private dns server
no sensitive data written to disk
uses cloudflare doh as upstream dns source

Steps

tweak and save the docker-compose.yml file

apt install wireguard
echo 'net.ipv4.ip_forward=1' > /etc/sysctl.d/99-wireguard.conf
wg genkey | sudo tee /etc/wireguard/privatekey | wg pubkey | sudo tee /etc/wireguard/publickey
sysctl --system
wg-quick up wg0
systemctl enable wg-quick@wg0

	$fn = function ($fn) {
	dispatch(fn() => $fn($fn));
	dispatch(fn() => $fn($fn));
	};
	dispatch(fn() => $fn($fn));

	config.vm.provision "shell" do \|s\|
	s.name = "Install oh-my-zsh"
	s.privileged = false
	s.inline = <<-SHELL
	sudo apt install -y zsh
	wget -O ~/.zshrc https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/templates/zshrc.zsh-template
	sudo chsh -s /bin/zsh vagrant
	SHELL
	end

	<?php

	function array_shuffle_secure(array $input): array {
	$output = [];

	while ($arr) {
	$arr = array_values($arr);
	$char = random_int(0, count($arr) - 1);
	$output[] = $arr[$char];
	unset($arr[$char]);

	#!/usr/bin/env php
	<?php

	# read blog posting about this snippet
	# https://...

	if (!isset($argv[1])) {
	exit(1);
	}

	<?php

	static $words = [
	'also',
	'area',
	'away',
	'back',
	'bank',
	'base',
	'bash',

	<?php

	$rot128 = function (string $input) {
	foreach (str_split($input) as $i => $a) {
	$input[$i] = chr((ord($a) + 128) % 256);
	}

	return $input;
	};