Daren Wang lenew

The netfilter hooks in the kernel and where they hook in the packet flow

The figure below calls out

The netfilter hooks
The order of table traversal

Some of the Redis best practices content has moved

This content from this markdown file has moved a new, happier home where it can serve more people. Please check it out : https://docs.microsoft.com/azure/azure-cache-for-redis/cache-best-practices.

NOTE: Client specific guidance listed below is still valid and should still be considered. I will update this document once all content has been moved.

iOS 内购验证

本地验证:

Fix failing node deployments on AWS Elastic Beanstalk

Elastic beanstalk runs npm install with a system user that has no homedir. During the npm install step, it's expecting a $HOME env variable for the npm cache (which doesn't exist). add this file to your project's .ebextensions directory to have it use root's homedir as a temporary path.

This workaround was provided by AWS support, but it doesn't appear to be documented anywhere. Determining root cause on this was a massive pain in the ass. Sharing this so others don't need to feel the pain.

	using System;
	using System.IdentityModel.Tokens;
	using System.Security.Claims;
	using System.Security.Cryptography;

	namespace CreateValidateJWT
	{
	class Program
	{
	static void Main(string[] args)

	packages:
	yum:
	wget: []
	curl: []
	commands:
	00_remove_99_swap.conf.bak:
	command: rm -f /etc/sysctl.d/99_swap.conf.bak
	test: test -f /etc/sysctl.d/99_swap.conf.bak
	ignoreErrors: true
	00_remove_99_filesystem.conf.bak:

	/// <summary>
	/// Implementation of Mersenne Twister random number generator
	/// </summary>
	public class MersennePrimeRandom
	{
	private readonly uint[] _matrix = new uint[624];
	private int _index = 0;

	public MersennePrimeRandom() : this((uint)(0xFFFFFFFF & DateTime.Now.Ticks)) { }

	ruby doctor.rb
	/usr/bin/ruby1.8 (1.8.6)
	OpenSSL 0.9.8g 19 Oct 2007: /usr/lib/ssl
	SSL_CERT_DIR=""
	SSL_CERT_FILE=""

	HEAD https://status.github.com:443
	OpenSSL::SSL::SSLError: certificate verify failed

	The server presented a certificate that could not be verified:

	package main

	import (
	"io"
	"net"
	"os"
	"fmt"
	"strings"
	"syscall"
	"unsafe"

	%% Simple web server.
	-module(sws).
	-author('Steve Vinoski <[email protected]>').
	-export([start/1, start/2]).

	%% start/1 takes a handler function and starts the web server on port 8000.

	%% start/2 takes a handler function and a port number. The handler function
	%% takes two arguments: a TCP socket and request data. The request data is
	%% a property list indicating the invoked HTTP method, the target URI, the