snakevil

使用树莓派3B打造超强路由之二：初成

通过第一篇《使用树莓派3B打造超强路由之一：初装》的努力，树莓派3B已经可以作为一台超低能耗、随身携带的开发用服务器来使用了。但这对于目标——打造超强路由而言，才刚刚开始。接下来，我们需要将其打磨成一台基本的无线路由器。

WARNING 本文所有指令均仅供参考，切勿无脑复制粘贴！

robmiller

#
# Working with branches
#

# Get the current branch name (not so useful in itself, but used in
# other aliases)
branch-name = "!git rev-parse --abbrev-ref HEAD"
# Push the current branch to the remote "origin", and set it to track
# the upstream branch
publish = "!git push -u origin $(git branch-name)"

codeachange

#!/bin/bash

# CentOS release 6.4
# https://www.digitalocean.com/community/articles/how-to-setup-your-own-vpn-with-pptp

# rpm --import http://poptop.sourceforge.net/yum/RPM-GPG-KEY-PPTP
# rpm -i http://poptop.sourceforge.net/yum/stable/rhel6/pptp-release-current.noarch.rpm
# centos 6.5 use epel instead
# http://mirrors.hustunique.com/epel/6/i386/repoview/epel-release.html
rpm -Uvh http://mirrors.hustunique.com/epel/6/i386/epel-release-6-8.noarch.rpm

brian-mann

var FadeTransitionRegion = Backbone.Marionette.Region.extend({

  show: function(view){
    this.ensureEl();
    view.render();

    this.close(function() {
	  if (this.currentView && this.currentView !== view) { return; }
      this.currentView = view;

fxsjy

//author: Sun, Junyi (weibo.com/treapdb)
//usage: node --nouse-idle-notification --expose-gc --max-old-space-size=8192 memcached.js

var config ={
  port: 11211,
  max_memory: 300 // default 100M bytes
}

var net = require('net');
var LRU = function (max) { // this LRU implementaion is based on https://github.com/chriso/lru

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

senko

#!/bin/bash
#
# Watch current directory (recursively) for file changes, and execute
# a command when a file or directory is created, modified or deleted.
#
# Written by: Senko Rasic <[email protected]>
#
# Requires Linux, bash and inotifywait (from inotify-tools package).
#
# To avoid executing the command multiple times when a sequence of