Emrah Ayanoglu emrahayanoglu

Scenario:

multiple USB devices plugged via hub to a host (Linux OS based),
multiple services/programs interacting with TTY running on top (e.g. GPSd)

Problem:

At boot TTY are randomly assigned to devices causing depending services/programs instabilities. They could indeed fail to start because of different TTY configurations.

Solution:

VPN (OpenVPN) server and clients setup 🚂🚇😀

This gist give all the steps in order to build a VPN (OpenVPN) network with server and clients (automatic generation for clients certificates). 😀

Server configuration
Clients configuration
Security
Generate automatic certificates for clients

	package main

	import (
	"crypto/rand"
	"crypto/rsa"
	"crypto/x509"
	"crypto/x509/pkix"
	"encoding/pem"
	"fmt"
	"math/big"

	This is free and unencumbered software released into the public domain.

	Anyone is free to copy, modify, publish, use, compile, sell, or
	distribute this software, either in source code form or as a compiled
	binary, for any purpose, commercial or non-commercial, and by any
	means.

	In jurisdictions that recognize copyright laws, the author or authors
	of this software dedicate any and all copyright interest in the
	software to the public domain. We make this dedication for the benefit

	1) ==== Autossh using systemd ====

	Example from

	https://gist.github.com/drmalex07/c0f9304deea566842490

	2) =============

	Install autossh

	import os

	import pandas as pd
	from influxdb import DataFrameClient


	class Client(DataFrameClient):
	def __init__(self, host=None, port=8086, database=None):
	host = host or os.environ["INFLUXDB_HOST"]
	super().__init__(host, port)

	package main


	import (
	"encoding/json"
	"os"
	"reflect"
	"text/template"
	)

	#!/usr/bin/env bash
	# TYPE= argument to the script where 0 = MAJOR, 1 = MINOR, 2 = BUILD. Default to BUILD.
	GIT_VERSION=$(git describe --tags)
	CURRENT_VERSION=$(echo ${GIT_VERSION:1} \| cut -d'-' -f1)
	TYPE=${1:-2}

	function increment_version() {
	local VERSION="$1"
	local PLACE="$2"

	// This shows an example of how to generate a SSH RSA Private/Public key pair and save it locally

	package main

	import (
	"crypto/rand"
	"crypto/rsa"
	"crypto/x509"
	"encoding/pem"
	"golang.org/x/crypto/ssh"


	== How to Implement an AWS Lambda function using Swift 4

	1. Use the appropriate docker image to build a Swift 4 executable.

	docker run -it -v "$(PWD):/app" doctorimpossible/swift4ubuntu bash

	mkdir demo; cd demo
	swift package init --type executable
	:: edit Sources/demo/main.swift

Emrah Ayanoglu emrahayanoglu

VPN (OpenVPN) server and clients setup 🚂🚇😀

Server configuration