willb

/*
  ptr_inspect.c

  Demonstration code; shows how to trace the system calls in a child
  process with ptrace.  Only works on 64-bit x86 Linux for now, I'm
  afraid.  (Even worse, it's only tested on Linux 2.6....) 
 
  The callname() function looks clunky and machine-generated because it
  *is* clunky and machine-generated.

kfox

# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled.  See sysctl(8) and
# sysctl.conf(5) for more details.

# Controls source route verification
net.ipv4.conf.default.rp_filter = 1

# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0

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

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

fabrizioc1

package main

import (
    "fmt"
	"io"
	"log"
	"net/http"
)

type HttpConnection struct {

sanatgersappa

package main

import (
    "html/template"
	"io"
	"net/http"
	"os"
)

//Compile templates on start

soarez

How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

PurpleBooth

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

d-schmidt

package main
import (
    "net/http"
    "log"
)

func redirect(w http.ResponseWriter, req *http.Request) {
    // remove/add not default ports from req.Host
    target := "https://" + req.Host + req.URL.Path 
    if len(req.URL.RawQuery) > 0 {

tevino

package main

import (
	"fmt"
	"net"
	"os"
	"syscall"
)

const (