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yushijinhun / ra_prefix_filter.c
Last active April 27, 2023 03:10
eBPF program to filter prefixes in IPv6 RA
/**
* ra_prefix_filter.c - eBPF program to filter prefixes in IPv6 RA
* Copyright (C) 2023 Haowei Wen <yushijinhun@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
@kennytv
kennytv / readme.md
Last active May 8, 2024 06:32
Signed Chat and Chat Types

Signed chat

This gist intends on clearing up some of the misinformation surrounding signed chat/the reporting feature Mojang has added to Minecraft 1.19.1. Here you can find both technical information as well as a general explanation of how these work.

Profile keys

After joining a server, clients now send a profile key used for verifying a message's authenticity. This key and thus the whole signing process is optional, but by default, servers enforce secure profiles for clients to send chat messages. Whenever the player sends a chat message and has a key associated, the message will be signed using their own private key, which the server then verifies using the public key sent after join. Assuming signature, timestamp, and message contents line up, the message goes through.

On the other end, clients can also require all broadcasted player messages to be signed, disregarding the ones without sender verified signatures.

Message signatures

@HimDek
HimDek / Install Android apps or apk files in Windows using Windows Subsystem for Android (No Emulator).md
Last active May 10, 2024 13:33
This Guide will show you how to install and run apk files or Android apps in any Edition of Windows 11 using Windows Subsystem for Android. WSA or Windows Subsystem for Android is a Tool that allows Windows to run Android Apps directly without using any emulator.

Install Android apps or apk files in Windows using Windows Subsystem for Android

WSA or Windows Subsystem for Android is a Tool that allows Windows to run Android Apps directly without using any emulator. The problem is Windows Subsystem for Android is currently only available through preview via the Beta Channel of the Windows Insider Program. But if you follow my guide, you don't have to be in Windows Insider Program to try it out. The only thing you need is Windows 11 installed and some patience.

Prerequisites:

  • Windows Subsystem for Android or WSA must be Installed.

Click here to view the guide that shows how to install Windows Subsystem for Android in any Edition of Windows 11 (including Windows 11 Home) non Inider or stable release.

How to Install Android Apps or apk files in Windows Subsystem for Android:

@pantor
pantor / nvidia-driver-realtime.sh
Last active May 3, 2024 14:25
Installing NVIDIA drivers on a realtime Linux (PREEMPT-RT)
# Tested on Ubuntu 16.04 and X11, 2019
# 1. Download NVIDIA driver as a .run file
# 2. Stop X-Server
sudo service lightdm stop
# 3. Blacklist Nouveau driver
sudo nano /etc/modprobe.d/blacklist-nouveau.conf
@wangruohui
wangruohui / intel-nvidia.md
Last active April 25, 2024 10:38
Intel for display, Nvidia for computing

Intel for display, NVIDIA for computing

This guide will show you how to use Intel graphics for rendering display and NVIDIA graphics for CUDA computing on Ubuntu 18.04 / 20.04 desktop.

I made this work on an ordinary gaming PC with two graphics devices, an Intel UHD Graphics 630 plus an NVIDIA GeForce GTX 1080 Ti. Both of them can be shown via lspci | grep VGA.

00:02.0 VGA compatible controller: Intel Corporation Device 3e92
01:00.0 VGA compatible controller: NVIDIA Corporation GP102 [GeForce GTX 1080 Ti] (rev a1)
@artizirk
artizirk / 0README.md
Last active July 24, 2022 19:39

Wireguard autmatic configuration ideas

Collection of ideas for automatic wireguard interface configuration

Generating ipv6 aadresses

  • Interface gets a link local ip like so fe80::hash(interfacepubkey)/64
  • Each peer allowed ips get fe80::hash(peerpubkey)/128

Pushing ipv6 configuration

@yushijinhun
yushijinhun / !jdk-8203870.md
Last active December 19, 2019 04:27
[JDK-8203870]OpenJDK FXML Read-Only List Properties Bug

Issue in JDK Bug System: JDK-8203870

Expected output:

listProp: [elementA, elementB]
Problem did not appear
@stueja
stueja / lxd-wayland-gui.md
Last active March 6, 2024 05:39
GUI application via Wayland from Ubuntu LXD container on Arch Linux host
@fxkraus
fxkraus / debian-install-megacli.md
Last active May 10, 2024 11:27
Install LSI MegaCli .deb package on Debian/Ubuntu

download

wget https://docs.broadcom.com/docs-and-downloads/raid-controllers/raid-controllers-common-files/8-07-14_MegaCLI.zip

unzip

unzip 8-07-14_MegaCLI.zip
@nicowilliams
nicowilliams / fork-is-evil-vfork-is-good-afork-would-be-better.md
Last active November 5, 2023 12:14
fork() is evil; vfork() is goodness; afork() would be better; clone() is stupid

I recently happened upon a very interesting implementation of popen() (different API, same idea) called popen-noshell using clone(2), and so I opened an issue requesting use of vfork(2) or posix_spawn() for portability. It turns out that on Linux there's an important advantage to using clone(2). I think I should capture the things I wrote there in a better place. A gist, a blog, whatever.

This is not a paper. I assume reader familiarity with fork() in particular and Unix in general, though, of course, I link to relevant wiki pages, so if the unfamiliar reader is willing to go down the rabbit hole, they should be able to come ou