Command Line - Lerk's Blog

Turning a PC on and off using an ESP8266

In this post I'll report about my project of controlling the power and reset buttons (and LED) of my pc by using an ESP8266.

How To

Setting up an encrypted MQTT server on Debian/Ubuntu using mosquitto.

In this tutorial I will show how to install a MQTT server (mosquitto) on Debian/Ubuntu based systems with authentication and TLS using Let's Encrypt.

How To

Building Apps for ODROID-GO using ESP-IDF

In this post I describe the progress I've made (and potential pitfalls I've encountered) developing apps for the Odroid-Go using ESP-IDF or the Arduino IDE.

Software

How to monitor dedicated servers (IMHO)

I have been playing with monitoring applications and servers for a while now and especially like Prometheus and Grafana. In this post I'll try to show how I monitor a small group of dedicated servers.

How To

How to deploy a single JAR file to Maven (oneliner)

I sometimes stumble upon Java libraries that are not available in Maven (or Gradle which seems to use the same ecosystem). To have to most convenient way of developing (ie. contributors should not have to download dependencies for themselves) I use my own Maven repository for hosting these.

How To

Developing Greenfoot games with Maven/IntelliJ/Eclipse

I found out, how to create a Greenfoot game without having to use the Greenfoot IDE. I'm programming using IntelliJ and building using Maven. It works like a charm and it's a lot more convenient to use this over the Greenfoot IDE.

Terminal

How to change/remove the Ubuntu Server login banner

If you've ever used a freshly installed Ubuntu Server (since 14.x), you definetly noticed the login banner that shows information scraped from the web. This might be Ubuntu news, updates or some other stuff.

macOS

Packaging a .jar as .app file for macOS

When you write a Java application, you'll get a `.jar` file in the end. If you launch this file on a mac, you'll end up having the default java icon and you are unable to save the application in the Dock. Fortunately, there is a Maven plugin to package a .jar file into a native .app file.

Docker

The ultimate Docker cleanup command

If you use Docker, you might have some problems with all those images you build during development polluting your hard drive. Good thing is, if you want of that stuff gone, there is a neat oneliner that will do exactly that!

Xen

How To: Install Xen Orchestra from source

XenOrchestra is a great tool to manage your Xen servers with a single web interface. It is particularly interesting for me, because it can install missing patches automatically. Updating is one of the

macOS

How to convert AIFF to MP3 on command line

If you've ever made a really big track (big as in file size), and you have a website where you'd like to upload it, but the website has a size limit, you'll have

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