brunocastello

#!/bin/sh
qemu-3dfx/bin/qemu-system-i386 \
-name "Windows 2002 Professional" \
-L pc-bios -nodefaults -no-hpet -no-reboot -display sdl \
-M pc,accel=tcg -cpu qemu32 -m 1024 \
-drive id=root,format=raw,file=Disks/WinXP.img \
-drive id=drive1,media=cdrom \
-device VGA -device sb16 -device rtl8139,netdev=net0 \
-netdev user,id=net0,hostfwd=tcp::8080-:80,hostfwd=tcp::2222-:22 \
-rtc base=localtime,clock=host -boot c

jfeilbach

TCP tuning

The most important TCP tuning areas since kernel 4.9 are:

• packet pacing
• dynamic TSO sizing
• TCP small queues
• BBR TCP congestion algorithm

Definitions

• Gb = gigabit

JoeyBurzynski

# Kernel sysctl configuration file for Linux
#
# Version 1.14 - 2019-04-05
# Michiel Klaver - IT Professional
# http://klaver.it/linux/ for the latest version - http://klaver.it/bsd/ for a BSD variant
#
# This file should be saved as /etc/sysctl.conf and can be activated using the command:
# sysctl -e -p /etc/sysctl.conf
#
# For binary values, 0 is disabled, 1 is enabled.  See sysctl(8) and sysctl.conf(5) for more details.

TomFaulkner

Ubuntu 18.04 VFIO GPU passthrough with a single GPU (onboard automatically disables itself)

Hardware

https://www.reddit.com/r/JDM_WAAAT/comments/8zgkfj/server_build_nas_killer_v_20_the_terminator_dual/ 2x X5650 from this thread Aside from that build guide, a generic USB3 card and an AMD R9-200

Grub

Modify /etc/default/grub and add vfio-pci.ids=dead:beef video=efifb:off to GRUB_CMDLINE_LINUX_DEFAULT (use the PCI vid/pid of your primary GPU, not dead:beef)

mikroskeem

#!/bin/bash -e

# https://www.kraxel.org/blog/2018/04/vgpu-display-support-finally-merged-upstream/

# You should set up your system as following:
# 1) Add 'i915.enable_gvt=1 intel_iommu=on iommu=pt' to boot arguments
# 1.1) If you get Windows guest working somehow, then add 'kvm.ignore_msrs=1' to avoid guest BSOD-ing
#       (Windows does weird stuff).
# 2) `MODULES=(kvm kvmgt i915)` in /etc/mkinitcpio.conf
# 3) `echo -e "options i915 enable_gvt=1\nsoftdep i915 pre: kvmgt" > /etc/modprobe.d/20-kvmgt.conf` for sure

extremecoders-re

Setting up Qemu with a tap interface

There are two parts to networking within QEMU:

• The virtual network device that is provided to the guest (e.g. a PCI network card).
• The network backend that interacts with the emulated NIC (e.g. puts packets onto the host's network).

Example: User mode network

akeaswaran

ESPN's hidden API endpoints

Football

College Football

Latest News: http://site.api.espn.com/apis/site/v2/sports/football/college-football/news

Latest Scores: http://site.api.espn.com/apis/site/v2/sports/football/college-football/scoreboard

praveenpuglia

I am moving this gist to a github repo so more people can contribute to it. Also, it makes it easier for me to version control.

Please go to - https://github.com/praveenpuglia/shadow-dom-in-depth for latest version of this document. Also, if you find the document useful, please shower your love, go ⭐️ it. :)

Shadow DOM

Heads Up! It's all about the V1 Spec.

In a nutshell, Shadow DOM enables local scoping for HTML & CSS.

nikneroz

Elixir + Phoenix Framework + Guardian + JWT + Comeonin

Preparing environment

We need to generate secret key for development environment.

mix phoenix.gen.secret
# ednkXywWll1d2svDEpbA39R5kfkc9l96j0+u7A8MgKM+pbwbeDsuYB8MP2WUW1hf

Let's generate User model and controller.

laobubu

Pico HTTP Server in C

This is a very simple HTTP server for Unix, using fork(). It's very easy to use

How to use

1. include header httpd.h
2. write your route method, handling requests.
3. call serve_forever("12913") to start serving on port 12913