davidandreoletti

Linux Virtual Machines with Private Network on an Apple M1 Device

Background

The aim was to be able to:

1. Run multiple Linux VMs on an Apple M1/ARM device
2. Use Apple's HVF for native performance speeds
3. Configure VMs to allow network access to each other
4. Configure VMs to allow access to the internet
5. Not rely on custom modifications of software

davidandreoletti

Gitlab CI/CD

• Gitlab CI/CD
  • General
    • How to make my jobs execute in parallel?
    • How to execute a job only when some files were changed?
    • What about interactive jobs?
    • Extending/Templating jobs
    • Running locally
• Docker-in-Docker doesn't work in gitlab-runner exec docker

davidandreoletti

Database commands in psql

Connect to psql as a non postgres user $ psql -d testdbname - when the os user exists in the db and trusted authentication is enabled.

# create database db2; - create a database
# drop database db2; - drop a database
# \c[onnect] db2 - connect to a database
# \l[ist] - list all databases
# \l+ - list all databases with extra details, including size

davidandreoletti

#!/bin/bash


#
# For latest version please check https://github.com/doomedraven/Tools/blob/master/Virtualization/kvm-qemu.sh
# 

# https://www.doomedraven.com/2016/05/kvm.html
# Use Ubuntu 18.04 LTS

davidandreoletti

#
# Reading video from FFMPEG using subprocess - aka when OpenCV VideoCapture fails
#
# 2017 note: I have realized that this is similar to moviepy ffmpeg reader with the difference that here we support YUV encoding
# BUT we lack: bufsize in POpen and creation flags for windows 
# https://github.com/Zulko/moviepy/blob/master/moviepy/video/io/ffmpeg_reader.py
#
# Emanuele Ruffaldi 2016
import cv2
import subprocess

davidandreoletti

public protocol DataSource: class {
    associatedtype AbstractType
    func source() -> AbstractType
}

class ViewController<T: DataSource>: UIViewController {
    
    weak var dataSouce: T?
    typealias AbstractType = T.AbstractType

davidandreoletti

#!/bin/sh

INSTALLERIMG="/Applications/Install OS X El Capitan.app/Contents/SharedSupport/InstallESD.dmg"
OUTDIR="/Users/$(whoami)/Desktop"
FILENAME="Install OS X El Capitan"

TMPIMG="/tmp/ElCapitan.sparseimage"
SOURCEDISK="/Volumes/InstallESD"
TARGETDISK="/Volumes/BaseSystem"

davidandreoletti

#===============================================================================
# Filename:  boost.sh
# Author:    Pete Goodliffe
# Copyright: (c) Copyright 2009 Pete Goodliffe
# Licence:   Please feel free to use this, with attribution
# Modified version
#===============================================================================
#
# Builds a Boost framework for iOS, iOS Simulator, and OSX.
# Creates a set of universal libraries that can be used on an iOS and in the

davidandreoletti

void rethrow_cpp_exception_as_java_exception() 
{
  try 
  {
      throw;
  }
  catch (const package::Exception& e)                             
  {                                                               
    jclass jc = env->FindClass("group/package/Exception");        
    if(jc) env->ThrowNew (jc, e.what());                          

davidandreoletti

#!/usr/bin/perl -w
# Key generation for BTsync.

# Author          : Johan Vromans
# Created On      : Sun Apr 27 20:31:57 2014
# Last Modified By: Johan Vromans
# Last Modified On: Fri May  2 15:37:24 2014
# Update Count    : 47
# Status          : Unknown, Use with caution!