jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

aras-p

// Just before switching jobs:
// Add one of these.
// Preferably into the same commit where you do a large merge.
//
// This started as a tweet with a joke of "C++ pro-tip: #define private public",
// and then it quickly escalated into more and more evil suggestions.
// I've tried to capture interesting suggestions here.
//
// Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_,
// @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant,

m0ngr31

Using Google Stadia controllers with bluetooth is notoriously a pain. Some just won't reconnect after they've been paired initially. This script is an attempt to solve that issue in Linux. You can create a .desktop file and have it autostart when you boot your computer.

Every 60 seconds it will look at the list of the controllers that you have paired previously and compare that with the list of controllers that are currently connected. It will take the diff of that and attempt to connect to each one.

#!/bin/bash

# Function to get currently connected Stadia controllers
get_connected_controllers() {
    local devices="$1"

int0x80

Here's one of my favorite techniques for lateral movement: SSH agent forwarding. Use a UNIX-domain socket to advance your presence on the network. No need for passwords or keys.

root@bastion:~# find /tmp/ssh-* -type s
/tmp/ssh-srQ6Q5UpOL/agent.1460

root@bastion:~# SSH_AUTH_SOCK=/tmp/ssh-srQ6Q5UpOL/agent.1460 ssh user@internal.company.tld

user@internal:~$ hostname -f
internal.company.tld

kemitchell

https://youtu.be/-C-JoyNuQJs?t=39m45s

When I put the reference implementation onto the website I needed to
put a software license on it.

And I looked at all the licenses that were available, and there were a lot
of them. And I decided that the one I liked the best was the MIT License,
which was a notice that you would put on your source and it would say,
"you're allowed to use this for any purpose you want, just leave the
notice in the source and don't sue me."

Misairu-G

Reddit post (Archived)

Table of Content

• What to expect?
  • Some TLDR about the idea behind
• Prerequisites
  • Hardware
  • System & Software
• Update: Attention for MUXless laptop

ipedrazas

# knife cheat

## Search Examples

	knife search "name:ip*" 
	knife search "platform:ubuntu*"
	knife search "platform:*" -a macaddress
	knife search "platform:ubuntu*" -a uptime
	knife search "platform:ubuntu*" -a virtualization.system
	knife search "platform:ubuntu*" -a network.default_gateway

ThisIsMissEm

var child_process = require('child_process');

exports.handler = function(event, context) {
  var proc = spawn('./test', [ JSON.stringify(event) ], { stdio: 'inherit' });

  proc.on('close', function(code){
    if(code !== 0) {
      return context.done(new Error("Process exited with non-zero status code"));
    }

benizi

#!/bin/sh
# Print four lines showing blocks of colors: 0-7 | 0-7bold | 8-15 | 8-15bold
perl -CADS -lwe '
my $block = shift || (chr(0x2588) x 3);
for (["", 0], ["1;", 0], ["", 8], ["1;", 8]) {
  my ($bold, $offset) = @$_;
  my @range = map $offset + $_, 0..7;
  printf "%s %-6s ", $bold ? "bold" : "norm", "$range[0]-$range[-1]";
  print map("\e[${bold}38;5;${_}m$block", @range), "\e[0m"
}

varqox

How to record multiple applications and microphone into one audio file on Linux

Step 0. Terminology

Sinks are for output, sources are for input. To stream source to sink a loopback must be created. More shall you find there.

Step 1. Create output sink that will be recorded

Our output sink will be named recording.

pacmd load-module module-null-sink sink_name=recording sink_properties=device.description=recording