👋 Hi, I’m David Miranda

LVM guide: Create and manage PV, VG, LV, and filesystems (XFS and EXT4) LVM lets you flexibly manage storage by layering logical volumes over physical devices. This guide covers creating and managing physical volumes (PV), volume groups (VG), and logical volumes (LV), then formatting with ext4 or XFS, mounting, resizing, snapshots, and safe removal. Tip: Commands generally require root. Use sudo -i or prefix sudo where appropriate. Overview and terminology Physical volume (PV): The base storage device (e.g., /dev/sdb) initialized for LVM. Volume group (VG): A pool of space made from one or more PVs (e.g., vgdata). Logical volume (LV): A “virtual partition” carved from a VG (e.g., lvapps) that you format and mount like a normal block device. Filesystems: ext4 is versatile and supports online resize (grow/shrink). XFS is resilient and fast, supports online grow only (no shrink). Prerequisites and safety Check devices: Confirm the correct disk(s) before initializing. ...

Tracking work hours manually can be tedious. As a System Engineer who loves automation, I’ve streamlined this process using Home Assistant, zones, and the Clockify API. Here’s how I automatically log my work hours when I arrive at or leave my office, leveraging Home Assistant automations and Clockify’s API. Why Automate Time Tracking? Manual time tracking is easy to forget. By automating this with Home Assistant and Clockify, I ensure my timesheets are accurate and up-to-date, with zero manual intervention. This setup is especially useful because I move between multiple office locations and want a seamless integration with my smart home/work environment. ...

When automating infrastructure and configuration, two tools often come up in conversation: Ansible and Terraform. Both are widely used in the DevOps ecosystem, but they serve different purposes and shine in different use cases. This post breaks down the key differences between the two to help you decide when to use one, the other, or both. What is Terraform? Terraform, developed by HashiCorp, is an Infrastructure as Code (IaC) tool used to provision and manage infrastructure across multiple cloud providers and services. It describes infrastructure in a declarative manner using HCL (HashiCorp Configuration Language) and focuses on creating and updating infrastructure components like networks, servers, databases, and more. ...