Kory Kyzar korrosivesec

Vagrant and VMWare Tech Preview 21H1 on Apple M1 Pro

UPDATE November 20, 2022: VMWare Fusion 13

VMWare Fusion 13 is now released. Read Vagrant and VMWare Fusion 13 Player on Apple M1 Pro for the latest.

Summary

This document summarizes notes taken while to make the VMWare Tech preview work on Apple M1 Pro, it originated

Learn Go in ~5mins

This is inspired by A half-hour to learn Rust and Zig in 30 minutes.

Basics

Your first Go program as a classical "Hello World" is pretty simple:

First we create a workspace for our project:

Raspberry Pi on Internet via reverse SSH tunnel

HackerNews discussed this with many alternative solutions: https://news.ycombinator.com/item?id=24893615

I already have my own domain name: mydomain.com. I wanted to be able to run some webapps on my Raspberry Pi 4B running perpetually at home in headless mode (just needs 5W power and wireless internet). I wanted to be able to access these apps from public Internet. Dynamic DNS wasn't an option because my ISP blocks all incoming traffic. ngrok would work but the free plan is too restrictive.

I bought a cheap 2GB RAM, 20GB disk VM + a 25GB volume on Hetzner for about 4 EUR/month. Hetzner gave me a static IP for it. I haven't purchased a floating IP yet.

Spark Tips & Tricks

Misc. Tips & Tricks

If values are integers in [0, 255], Parquet will automatically compress to use 1 byte unsigned integers, thus decreasing the size of saved DataFrame by a factor of 8.
Partition DataFrames to have evenly-distributed, ~128MB partition sizes (empirical finding). Always err on the higher side w.r.t. number of partitions.
Pay particular attention to the number of partitions when using flatMap, especially if the following operation will result in high memory usage. The flatMap op usually results in a DataFrame with a [much] larger number of rows, yet the number of partitions will remain the same. Thus, if a subsequent op causes a large expansion of memory usage (i.e. converting a DataFrame of indices to a DataFrame of large Vectors), the memory usage per partition may become too high. In this case, it is beneficial to repartition the output of flatMap to a number of partitions that will safely allow for appropriate partition memory sizes, based upon the

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1" />
	<title>scratch</title>
	<style>
	body {
	font-family: Hack, Menlo, Monaco, 'Droid Sans Mono', 'Courier New', monospace;
	white-space: pre;

	import ruamel.yaml

	yaml = ruamel.yaml.YAML()
	data = yaml.load(open('environment.yml'))

	requirements = []
	for dep in data['dependencies']:
	if isinstance(dep, str):
	package, package_version, python_version = dep.split('=')
	if python_version == '0':

	import zmq

	# ZeroMQ Context
	context = zmq.Context()

	# Define the socket using the "Context"
	sock = context.socket(zmq.SUB)

	# Define subscription and messages with prefix to accept.
	sock.setsockopt(zmq.SUBSCRIBE, "misp_json")

	###
	###
	### UPDATE: For Win 11, I recommend using this tool in place of this script:
	### https://christitus.com/windows-tool/
	### https://github.com/ChrisTitusTech/winutil
	### https://www.youtube.com/watch?v=6UQZ5oQg8XA
	### iwr -useb https://christitus.com/win \| iex
	###
	### OR take a look at
	### https://github.com/HotCakeX/Harden-Windows-Security

	#API Documentation: https://api.riskiq.net/api/articles/
	#Command to pull IoC's for "Magecart Group 12: End of Life Magento Sites Infested with Ants and Cockroaches"

	curl -u <RiskIQ_Email>:<APIKey> 'https://api.riskiq.net/pt/v2/articles/indicators?articleGuid=fda1f967' \| jq '.indicators[] .value'