unique1984

#!/bin/bash

# Install dependencies only for Docker.
[[ ! -e /.dockerinit ]] && exit 0
set -xe

# Update packages and install composer and PHP dependencies.
apt-get update -yqq
apt-get install git libcurl4-gnutls-dev libicu-dev libmcrypt-dev libvpx-dev libjpeg-dev libpng-dev libxpm-dev zlib1g-dev libfreetype6-dev libxml2-dev libexpat1-dev libbz2-dev libgmp3-dev libldap2-dev unixodbc-dev libpq-dev libsqlite3-dev libaspell-dev libsnmp-dev libpcre3-dev libtidy-dev phpunit -yqq

unique1984

Sample config for 2 million web socket connection

    sysctl -w fs.file-max=12000500
    sysctl -w fs.nr_open=20000500
    # Set the maximum number of open file descriptors
    ulimit -n 20000000

    # Set the memory size for TCP with minimum, default and maximum thresholds 
 sysctl -w net.ipv4.tcp_mem='10000000 10000000 10000000'

unique1984

Let's Encrypt / Dovecot / Postfix / UFW firewall / Certbot

This tutorial describes how to install TLS to a mail server consisting of Postfix and/or Dovecot by using Let's Encrypt certificates with automatic renewing and firewall management.

The system used for this tutorial was:

$ lsb_release -idrc
Distributor ID: Ubuntu

unique1984

xstat() {
  for target in "${@}"; do
    inode=$(ls -di "${target}" | cut -d ' ' -f 1)
    fs=$(df "${target}"  | tail -1 | awk '{print $1}')
    crtime=$(sudo debugfs -R 'stat <'"${inode}"'>' "${fs}" 2>/dev/null | 
    grep -oP 'crtime.*--\s*\K.*')
    printf "%s\t%s\n" "${crtime}" "${target}"
  done
}

unique1984

# This is just a cheat sheet:

# On production
sudo -u postgres pg_dump database | gzip -9 > database.sql.gz

# On local
scp -C production:~/database.sql.gz
dropdb database && createdb database
gunzip < database.sql.gz | psql database

unique1984

Docker Commands, Help & Tips

Show commands & management commands

$ docker

Docker version info

unique1984

/**
 * Calculate the center/average of multiple GeoLocation coordinates
 * Expects an array of objects with .latitude and .longitude properties
 *
 * @url http://stackoverflow.com/a/14231286/538646
 */
function averageGeolocation(coords) {
  if (coords.length === 1) {
    return coords[0];
  }

unique1984

# wget -O "/etc/X11/xorg.conf" https://gist.githubusercontent.com/unique1984/1d29e8caaf649546ff0bc07769b834af/raw/8140fc06dd02daae33ec7cae6aabcf6225c6dcd3/X11%2520Dummy%2520configuration.txt
# This xorg configuration file will start a dummy X11 server.
# move it to /etc/X11/xorg.conf
# don't forget apt install xserver-xorg-video-dummy;
# based on https://xpra.org/Xdummy.html

Section "ServerFlags"
  Option "DontVTSwitch" "true"
  Option "AllowMouseOpenFail" "true"
  Option "PciForceNone" "true"

unique1984

<?php
require_once __DIR__.'/V8JsNodeModuleLoader_FileAccessInterface.php';
require_once __DIR__.'/V8JsNodeModuleLoader_NormalisePath.php';

/**
 * Simple Node.js module loader for use with V8Js PHP extension
 *
 * This class understands Node.js' node_modules/ directory structure
 * and can require modules/files from there.
 *

unique1984

console.log("---> Running");

const curl = require("curl");
const jsdom = require("jsdom");
const url = "http://www.imdb.com/list/ls004489992/";

curl.get(url, null, (err,resp,body)=>{
	if(resp.statusCode == 200){
		parseData(body);
	}