Technical Articles

Practical articles, in-depth tutorials, and architectural insights on software engineering, AI, and systems.

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DevOps•5 min

How to set up automatic VM backups in Proxmox

Learn how to configure automated VM backup routines and snapshots in Proxmox VE using vzdump, external storage, and practical command-line tools.

DevOpsProdutividade•5 min

Locked PDF? How to remove password and restrictions via CLI

Learn the complete step-by-step guide to removing open passwords and editing restrictions from PDF files using command-line utilities on Linux.

HardwareDevOps•4 min

How to recover data from a dead NVMe SSD via CLI

Learn how to access bricked NVMe storage controllers using low-level CLI tools to extract files before the drive fails permanently.

DevOps•4 min

How to release busy ports on Linux via terminal

Learn the exact step-by-step procedure to identify stuck services or zombie processes using lsof and netstat, and terminate execution cleanly with kill -9 on Linux.

DevOps•5 min

How to recover deleted files on Linux via terminal

Learn digital forensics techniques and data recovery using extundelete and testdisk to rescue deleted files on ext4 Linux systems.

RedesDevOps•4 min

How to scan open ports on local network with Nmap

Practical Nmap guide for system administrators to map open ports, discover hidden devices, and audit local subnetwork security.

DevOpsProdutividade•5 min

Npm stuck? How to clear cache and fix errors on Windows

Learn step by step how to fix installation failures and corrupted packages by clearing the npm cache on Windows via command line.

RedesDevOps•5 min

How to configure Wake on LAN on Linux to turn on servers

Learn step-by-step how to enable Wake on LAN on Linux servers and dispatch magic packets across the network to power on remote machines.

HardwareDevOps•5 min

How to monitor NVMe SSD temperature on Linux via terminal

Learn how to use command-line tools like smartctl and nvme-cli to extract health and thermal metrics from M.2 SSDs on Linux.

DevOps•4 min

Container restarting? How to debug Docker Exit Codes

Learn the real meaning of Docker exit codes like 137, 139, and 111. Track kernel logs and PID 1 behavior to identify memory issues and prevent crashes.