Systemd is a system used in Linux to manage boot and system processes. Its “units” are configuration files that describe the processes and services that systemd manages. One of these units is systemd.socket, which starts the corresponding daemon when a connection is established through a socket with the machine. A socket is a form of communication between processes over a network or within the system. By creating a unit of this type, we ask it to listen on a specific socket and start a specific service when a connection is received. …

I’m sharing my home networking setup with the option to knock on the door for on-demand access from the Internet. Today’s home networks end up supporting multiple services, and with the rise of home automation things get complicated, so I’ve decided to document it to keep track of everything in the future. The number of devices grows and maintaining the network of a smart and automated home becomes a priority. I dedicate this post to those Geeks or Techies who, like me, have been deep into the complexity of networking in a home automation network for a long time. …

Proxmox VE is a powerful and easy-to-use open-source virtualization platform that enables the deployment and management of virtual machines (VMs with KVM/QEMU) and containers (CTs based on LXC). Proxmox offers Templates to minimize the creation time of new instances of these virtual machines or containers. In this post I focus on how to create my own Virtual Machine Templates along with a cloud-based image and cloud-init. …

In this post I describe the installation process of a Raspberry Pi4B Rev1.5 (also tested with the Pi3B+) with the Raspberry Pi OS (64-bit) operating system (based on Debian). I normally use these Pis as single-purpose mini servers or for testing and lab work. …

Configuration of a NUC with Ubuntu + Open vSwitch + VLANs + KVM + VMs using netplan and Open vSwitch. The networking is based on OVS and Netplan for both the Host and the virtual machines. Last year I documented here how to configure Open vSwitch with KVM. In this post I’ll get straight to the point, showing the desired final state and how to configure it. …

Every now and then I get the urge to practice my rusty Java skills. I’m going to write a small program to monitor devices on my home network using Java and SNMP. I like to keep my development projects on my private git server (based on gitea). In this post I describe the process of creating a git repository, a Java Project with Eclipse, and how to connect them together. If you use GitHub, the process is identical, although the UI options may look slightly different compared to Gitea. …