ilkereroglu

Keybase proof

I hereby claim:

• I am ilkereroglu on github.
• I am ilkereroglu (https://keybase.io/ilkereroglu) on keybase.
• I have a public key ASB65HaPtUnJ9-urvM0b57JYALAXlmVmW15c23BuqBnKbQo

To claim this, I am signing this object:

ilkereroglu

INTRO

Concurrency is a domain I have wanted to explore for a long time because the locks and the race conditions have always intimidated me. I recall somebody suggesting concurrency patterns in golang because they said "you share the data and not the variables".

Amused by that, I searched for "concurrency in golang" and bumped into this awesome slide by Rob Pike: https://talks.golang.org/2012/waza.slide#1 which does a great job of explaining channels, concurrency patterns and a mini-architecture of load-balancer (also explains the above one-liner).

Let's dig in:

Goroutines

ilkereroglu

How to Install GO Lang on CentOS / Amazon Linux?

sudo wget https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz
tar -xzf go1.4.2.linux-amd64.tar.gz 
export GOROOT=PATH_WHERE_YOU_EXTRACT_GO
export PATH=$PATH:$GOROOT/bin 
export GOBIN=$GOROOT/bin 
mkdir ~/golang/ 
export GOPATH=~/golang/ 

ilkereroglu

web: node app

ilkereroglu

app.post('/selam', function (req, res, next) {
  var userName = req.body.user_name;
  var bot = {
    text : userName + 'Ooo cahil bey hoşgeldiniz.'
  };

  if (userName !== 'slackbot') {
    return res.status(200).json(bot);
  } else {
    return res.status(200).end();

ilkereroglu

var express = require('express');
var bodyParser = require('body-parser');

var app = express();
var port = process.env.PORT || 1666;

app.use(bodyParser.urlencoded({ extended: true }));

app.get('/', function (req, res) {
  res.status(200).send('Çalışıyor...'); 

ilkereroglu

{
  "name": "ilberHocaBot",
  "version": "0.0.1",
  "description": "Node Server",
  "main": "app.js",
  "author": "İlker Eroğlu",
  "license": "MIT",
  "dependencies": {
    "express": "^4.x.x",
    "body-parser": "^1.x.x",

ilkereroglu

Installing mailx

yum -y update

yum install -y mailx

We can now start sending e-mails using

ilkereroglu

Configure eth0

vi /etc/sysconfig/network-scripts/ifcfg-eth0 

TYPE="Ethernet"
BOOTPROTO="none"
DEFROUTE="yes"