Linux

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. …

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. …

Installation of Home Assistant OS (HAOS) on an Intel NUC5i5RYK — a very powerful machine for this task, but I had it available and wanted to make use of it. I started by setting it up on a Raspberry Pi4B, moved to a virtual machine (with considerably better performance) on KVM, and in this post I describe how I did the installation on a NUC. …

I explain how I connected Node-RED with my Home Assistant (HASS), considering that they run on separate servers. They are deployed on different virtual machines, to allow independent maintenance and improve their performance. For your reference, I created another post here where I describe the Node-RED installation using Alpine and Docker underneath, running as a virtual machine on my KVM server. …