designeng

#!/bin/bash

ROOT_UID=0     # Only users with $UID 0 have root privileges.
E_NOTROOT=87   # Non-root exit error.

# Run as root only (sudo counts)
if [ "$UID" -ne "$ROOT_UID" ]
then
  echo "You need root priveledges to run this script"
  exit $E_NOTROOT

designeng

ffmpeg -i input.mp4 -s hd480 -c:v libx264 -crf 23 -c:a aac -strict -2 output.mp4

designeng

See also:

• Free backend hosting
• https://free-for.dev/#/?id=dbaas

Service	Type	Storage	Limitations
Amazon DynamoDB	⚠️ Proprietary NoSQL	25 GB	⚠️ Payment method required
Amazon RDS	⚠️ Proprietary RDBMS		⚠️ Only free for 1 year
Azure SQL Database	MS SQL Server		⚠️ Only free for 1 year
👉 Clever Cloud	PostgreSQL, MySQL, MongoDB, Redis	256 MB (PostgreSQL)	Max 5 connections (PostgreSQL)

designeng

/* 

MIT No Attribution

Permission is hereby granted, free of charge, to any person obtaining a copy of this
software and associated documentation files (the "Software"), to deal in the Software
without restriction, including without limitation the rights to use, copy, modify,
merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so.

designeng

Git Cheat Sheet

Although there are enough resources on the web about Git, I will keep this one for my own reference. Minimal Git version required 1.7.2.

TOC

• Info
• Adding
• Branching
• Patching

designeng

<!-- parent form component -->

<template>
  <form>
    <FormSelector
       :options="users"
       :selected="currentUser"
       @change="onUserChange($event)"
    />
  </form>

designeng

/*An object created to parse through a large number of HTML
  blocks quickly. Used with cheerio.js. Begin via:
    parse.run($('some-div')[0])
*/

var fs = require('fs'),
  cheerio = require('cheerio');

var Parse = function(block) {

designeng

Deploy nodejs app with gitlab.com and pm2

This manual is about setting up an automatic deploy workflow using nodejs, PM2, nginx and GitLab CI. It is tested on:

• Target server: Ubuntu 16.04 x64. This is suitable for Ubuntu 14.x.
• Windows 10 on my PC to work.

designeng

const Promise = require('bluebird');
const fs = require('fs');
const execa = require('execa');

class BlueGreenDeployment {
  constructor({appName, blueProxyPassPattern, greenProxyPassPattern, nginxConfigFile}) {
    this.appName = appName;
    this.blueProxyPassPattern = blueProxyPassPattern;
    this.greenProxyPassPattern = greenProxyPassPattern;
    this.nginxConfigFile = nginxConfigFile;

designeng

# Remove all stopped containers:
docker rm $(docker ps -a -q)

# Remove all dangling Docker images:
docker rmi $(docker images -f "dangling=true" -q)