Alex Arul aa21

aa21 / mongodb

Last active September 21, 2015 02:16

	#installing mongodb
	vim /etc/yum.repos.d/mongodb.repo
	[mongodb]
	name=MongoDB Repository
	baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/x86_64/
	gpgcheck=0
	enabled=1

	yum install mongo-10gen mongo-10gen-server
	chkconfig mongod on

aa21 / Ethereum

Created August 14, 2015 06:40

	Blockchain
	- Anything that can be mathematically represented
	- can be modelled
	- secured
	- traded

	Privacy:
	- Info, Identity, Funds are private

	Contract: Program that runs everytime a message called a transaction is received

aa21 / NodeJs

Last active September 2, 2015 04:44

	# Serve Static Files from public folder
	app.use(express.static('public'));

	# Serve "public" folder's files as Static Files from path "/static"
	app.use('/static', express.static('public'));

	# Hosting apache & NodeJS on same server
	<VirtualHost *:80>
	ServerName bms.komiapp.com
	ProxyPreserveHost on

aa21 / Shopify

Created August 13, 2015 03:13

	If frontpage:
	https://ecommerce.shopify.com/c/ecommerce-design/t/if-home-variable-5824

aa21 / Bash_commands_etc.sh

Last active May 3, 2016 08:24

Bash Commands & tricks

	###### ~/.bash_profile ######

	alias a='vim ~/.bash_profile && source ~/.bash_profile'
	alias gpp='git pull && git push'

	# FIND PROCESS
	function p(){
	ps aux \| grep -i $1 \| grep -v grep
	}

aa21 / MySql - tuning

Last active August 29, 2015 14:27

Mysql tuning

	mysqltuner.pl
	https://raw.githubusercontent.com/major/MySQLTuner-perl/master/mysqltuner.pl

	tuning primer sh
	http://www.day32.com/MySQL/tuning-primer.sh

	calculator
	http://www.mysqlcalculator.com/

aa21 / PHP - MySql - Dynamic Table Columns

Last active January 23, 2018 03:38

Create table columns on the fly on a mysql db

	<?php

	$conn = mysqli_connect($ht, $ur, $pd);

	mysqli_select_db($conn, $db);

	//foreach req, check if the column exists, otherwise create it
	foreach($_POST as $k => $v){

	$key = trim(mysqli_real_escape_string($conn, $k));

aa21 / Debian 8 new setup

Last active August 29, 2015 14:20

Common setup for new Debian 8

	apt-get update

	#lamp
	apt-get install apache2 mysql-server
	mysql_secure_installation
	apt-get install php5 php-pear php5-mysql git vim locate
	updatedb

	vim /etc/vim/vimrc
	syntax on

aa21 / PHP - Show me the error

Last active April 7, 2018 08:02

PHP

	<?php

	error_reporting(-1); // reports all errors
	ini_set("display_errors", "1"); // shows all errors
	ini_set("log_errors", 1);
	ini_set("error_log", "/tmp/php-error.log");

	?>

aa21 / SEC - common passwords

Last active March 27, 2019 16:04

Common Passwords & Usernames