林博仁 Buo-ren Lin brlin-tw

About

I faced bandwidth issues between a WG Peer and a WG server. Download bandwidth when downloading from WG Server to WG peer was reduced significantly and upload bandwidth was practically non existent.
I found a few reddit posts that said that we need to choose the right MTU. So I wrote a script to find an optimal MTU.
Ideally I would have liked to have run all possible MTU configurations for both WG Server and WG Peer but for simplicity I choose to fix the WG Server to the original 1420 MTU and tried all MTUs from 1280 to 1500 for the WG Peer.

Testing

On WG server, I started an iperf3 server
On WG peer, I wrote a script that does the following:
- wg-quick down wg0
Edit MTU in the /etc/wireguard/wg0.conf file

Here is the best setup (I think so :D) for K-series Keychron keyboards on Linux.

Note: many newer Keychron keyboards use QMK as firmware and most tips here do not apply to them. Maybe the ones related to Bluetooth can be useful, but everything related to Apple's keyboard module (hid_apple) on Linux, won't work. As far as I know, all QMK-based boards use the hid_generic module instead. Examples of QMK-based boards are: Q, Q-Pro, V, K-Pro, etc.

Most of these commands have been tested on Ubuntu 20.04 and should also work on most Debian-based distributions. If a command happens not to work for you, take a look in the comment section.

Make Fn + F-keys work (NOT FOR QMK-BASED BOARDS)

Older Keychron keyboards (those not based on QMK) use the hid_apple driver on Linux, even in the Windows/Android mode, both in Bluetooth and Wired modes.

Negative Python user experience on Debian/Ubuntu

The user experience of Python on a minimal Debian or Ubuntu installation is bad. Core features like virtual environments, pip bootstrapping, and the ssl module are either missing or do not work like designed and documented. Some Python core developers including me are worried and consider Debian/Ubuntu's packaging harmful for Python's reputation and branding. Users don't get what they expect.

Reproducer

The problems can be easily reproduced with official Debian and Ubuntu containers in Docker or Podman. Debian Stable (Debian 10 Buster) comes with Python 3.7.3. Ubuntu Focal (20.04 LTS) has Python 3.8.5.

Run Debian container

This gist is currenctly archived.

Please refer to previous revisions if you know what to do.

The patch proposed was merged into kernel in 5.8 release, but no longer working as of linux 5.11

	-----BEGIN PGP SIGNED MESSAGE-----
	Hash: SHA512

	My resignation from freenode staff
	==================================

	I joined the freenode staff in March 2019 [1].

	Before I joined the staff, Freenode Ltd was sold [2] to a person named
	Andrew Lee as part of a sponsorship deal. The informal terms of that

	#!/usr/bin/env bash

	# Usage: ffcat <output> <input> [input ...]

	set -euo pipefail

	# Prints the contents of a concat file for ffmpeg.
	function catfile() {
	local inputs=($@)
	local input

	#!/bin/bash
	# SPDX-License-Identifier: MIT License
	# Steps:
	# 1) Make sure bash is available
	# 2) Create udev rule
	# - path to new udev rule: /etc/udev/rules.d/50-x-resize.rules
	# - udev rule content:
	# ACTION=="change",KERNEL=="card0", SUBSYSTEM=="drm", RUN+="/usr/local/bin/x-resize"
	# 3) Create /var/log/autores directory
	# 4) Create script /usr/local/bin/x-resize (this file) and make executable

	[Unit]
	Description=Wormhole Transit Relay

	[Service]
	Type=forked
	ExecStart=/opt/tr-venv/bin/twistd transitrelay
	Restart=on-failure

	[Install]
	WantedBy=default.target

	# Use FIO to emulate the Apps Class A1 performance test.
	# This isn't an exact benchmark as the card isn't in the state required by the
	# specification, but is good enough as a sniff test.
	#
	[global]
	ioengine=libaio
	iodepth=4
	size=64m
	direct=1
	end_fsync=1