jamak

dont buy ASUS motherboard for this topology - many of their motherboard do not implement full SW Connection Manager required for full spec USB4 / TB4 required for this topology and they are unable to articulate which motherboard do and do not have the required features and keep saying 20Gbp/s is the max speed of connection on intel NUCS - this is wrong. 13th and 14th Gen NUCs that implement a SW connection manager for USB4 / TB4 will work fine..

ProxMox Cluster - Soup-to-Nutz

aka what i did to get from nothing to done.

note: these are designed to be primarily a re-install guide for myself (writing things down helps me memorize the knowledge), as such don't take any of this on blind faith - some areas are well tested and the docs are very robust, some items, less so). YMMV

Purpose of Proxmox cluster project

Required Outomces of cluster project

Reinforcement Learning for Language Models

Yoav Goldberg, April 2023.

Why RL?

With the release of the ChatGPT model and followup large language models (LLMs), there was a lot of discussion of the importance of "RLHF training", that is, "reinforcement learning from human feedback". I was puzzled for a while as to why RL (Reinforcement Learning) is better than learning from demonstrations (a.k.a supervised learning) for training language models. Shouldn't learning from demonstrations (or, in language model terminology "instruction fine tuning", learning to immitate human written answers) be sufficient? I came up with a theoretical argument that was somewhat convincing. But I came to realize there is an additional argumment which not only supports the case of RL training, but also requires it, in particular for models like ChatGPT. This additional argument is spelled out in (the first half of) a talk by John Schulman from OpenAI. This post pretty much

Optics By Example Cheat Sheets

The following are appendices from Optics By Example, a comprehensive guide to optics from beginner to advanced! If you like the content below, there's plenty more where that came from; pick up the book!

Operators
Composition Guide
Substitution Guide
Optical Constarints and Types

Operator Cheat Sheet

Yubikey as an SSH key

All other guides I've seen (https://github.com/drduh/YubiKey-Guide being the most prolific) tell you to use the Yubikey's smartcard (PKCS#11) features with GnuPG via gpg-agent.

STOP THE MADNESS!

OpenSSH has supported OpenSC since version 5.4. This means that all you need to do is install the OpenSC library and tell SSH to use that library as your identity.

Prequisites

Setting up ssh public key authentication on macOS using a YubiKey 4

I largely followed Florin's blog post, but have a few notes to add regarding issues I encountered:

Basic setup notes

I used a YubiKey 4, while the blog describes using a YubiKey NEO. I'm sure a YubiKey 5 would also work. I'm also running macOS 10.13.6.
I installed GPGTools as recommended. However, as I'll note later, it seems that gpg-agent only automatically starts when gpg is used; for ssh, you'll need to ensure it's running.
Before generating your keys, decide what key size you want to use. If you run the list command inside gpg --edit-card, look for the Key attributes line to see what is currently selected. On my YubiKey 4, it defaulted to 2048 bits for all keys:

Key attributes ...: rsa2048 rsa2048 rsa2048

Disable Slack notifications for the weekend

There isn't a way to configure DND for the weekend on Slack. However, you can use the /dnd 24 hours command to disable notifications for 24 hours using the [undocumented API][api] and [legacy tokens][token]. We're going to use the undocumented api and IFTTT to automate this.

Steps

Generate a [token] for your account
Navigate to your personal DM and copy the url (e.g. DAYM93S0N from acme.slack.com/messages/DAYM93S0N/convo/GBG661YR2-1536698414.000100/)
Update the following url with your information (TOKEN looks like xoxp-4030334043-4959593942-3030320302032-sdf23rfasdf23rsf and CHANNEL looks like DAYM93S0N)
```
https://slack.com/api/chat.command?token=xoxp-4030334043-4959593942-3030320302032-sdf23rfasdf23rsf&channel=DAYM93S0N&command=%2Fdnd&text=24%20hours
```

	// 3D Dom viewer, copy-paste this into your console to visualise the DOM as a stack of solid blocks.
	// You can also minify and save it as a bookmarklet (https://www.freecodecamp.org/news/what-are-bookmarklets/)
	(() => {
	const SHOW_SIDES = false; // color sides of DOM nodes?
	const COLOR_SURFACE = true; // color tops of DOM nodes?
	const COLOR_RANDOM = false; // randomise color?
	const COLOR_HUE = 190; // hue in HSL (https://hslpicker.com)
	const MAX_ROTATION = 180; // set to 360 to rotate all the way round
	const THICKNESS = 20; // thickness of layers
	const DISTANCE = 10000; // ¯\\_(ツ)_/¯

	<div style="width:100%; font-family:serif;font-size:16px;text-align:justify;">
	<div style="font-weight:900;text-align:center;font-size:48px;border-bottom:3px solid black;font-variant:small-caps;margin-bottom:0px;">
	The Eggbug Times
	</div>

	<div style="font-style:italic; font-size:18px;text-align:center;">
	the fourth website to ever exist
	</div>

	<div style="text-transform:uppercase;font-size:48px;text-align:center;">

	#!/usr/bin/awk -f

	# This program is a copy of guff, a plot device. https://github.com/silentbicycle/guff
	# My copy here is written in awk instead of C, has no compelling benefit.
	# Public domain. @thingskatedid

	# Run as awk -v x=xyz ... or env variables for stuff?
	# Assumptions: the data is evenly spaced along the x-axis

	# TODO: moving average

	default['sshd']['sshd_config']['AuthenticationMethods'] = 'publickey,keyboard-interactive:pam'
	default['sshd']['sshd_config']['ChallengeResponseAuthentication'] = 'yes'
	default['sshd']['sshd_config']['PasswordAuthentication'] = 'no'