Valentine Ubani Mayaki valmayaki

Opening and closing an SSH tunnel in a shell script the smart way

I recently had the following problem:

From an unattended shell script (called by Jenkins), run a command-line tool that accesses the MySQL database on another host.
That tool doesn't know that the database is on another host, plus the MySQL port on that host is firewalled and not accessible from other machines.

We didn't want to open the MySQL port to the network, but it's possible to SSH from the Jenkins machine to the MySQL machine. So, basically you would do something like

ssh -L 3306:localhost:3306 remotehost

Setting up Babel and nodemon

Inital set-up

Set up project:

mkdir project
cd project
npm init -y

ffmpeg

Converting Audio into Different Formats / Sample Rates

Minimal example: transcode from MP3 to WMA:
ffmpeg -i input.mp3 output.wma

You can get the list of supported formats with:
ffmpeg -formats

Convert WAV to MP3, mix down to mono (use 1 audio channel), set bit rate to 64 kbps and sample rate to 22050 Hz:

	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
	<html>
	<head>
	<link rel="stylesheet" href="http://code.jquery.com/qunit/git/qunit.css" type="text/css" media="screen" />

	<!-- when.js Promises implementation -->
	<script src="https://raw.github.com/cujojs/when/master/when.js"></script>

	<!-- Unit testing and mocking framework -->
	<script type="text/javascript" src="http://code.jquery.com/qunit/git/qunit.js"></script>

	import random
	import math
	import timeit
	import matplotlib.pyplot as plt

	timeBubble = []
	timeSelection = []
	timeInsertion = []
	timeQuick = []
	timeMerge = []

	<?php
	/**
	* Download helper to download files in chunks and save it.
	*
	* @author Syed I.R <[email protected]>
	* @link https://github.com/irazasyed
	*
	* @param string $srcName Source Path/URL to the file you want to download
	* @param string $dstName Destination Path to save your file
	* @param integer $chunkSize (Optional) How many bytes to download per chunk (In MB). Defaults to 1 MB.

	# Convenience bash utils to handle docker: php + apache + modrewrite
	# * related issue: https://github.com/docker-library/php/issues/179#issuecomment-234594522
	#
	# Usage:
	# * Download the file
	# * In your "bash file"
	# * On debian based systems use: ~/.bashrc
	# * On Mac use: ~/.bash_profile
	# * Include the line: source PATH_TO_THE_DOWNLOADED_FILE
	# * Or just copy and paste the contents of this file

	<?php

	namespace Tests\Traits;

	use KushyApi\User;

	trait AttachJwtToken
	{
	/**
	* @var User

	<?php

	namespace Tests\Concerns;

	use App\Models\User;
	use Tymon\JWTAuth\Facades\JWTAuth;

	trait AttachJwtToken
	{
	/**

	/*
	* A heading is defined in degrees from true north, where headings are measured clockwise from true north (0 degrees).
	* The parameter for this function are two array that identifies a geo point with latitude at position 0 and longitude
	* at position 1.
	* This function is similar to https://developers.google.com/maps/documentation/javascript/geometry. I developed because
	* I need it on Meteor server side.
	* The result is a value between -180 and 180.
	*/
	var computeHeading = function (start, end){
	var lat1 = start[0]*Math.PI/180;