Technical Articles

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

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RedesDevOps•4 min

How to troubleshoot DNS failures on Linux step by step with dig

Learn how to debug name resolution problems, response times, and corrupted records directly in the Linux terminal using the dig command.

RedesDevOps•3 min

How to use the ss command on Linux to audit network connections

Learn how to replace the legacy netstat utility with the advanced ss command on Linux to inspect open sockets, track ports, and audit network traffic.

BackendDevOps•4 min

Slow database? How to optimize queries with EXPLAIN ANALYZE

Learn how to read execution plans in PostgreSQL to eliminate Sequential Scans, understand IOPS bottlenecks, and build efficient composite indexes.

AutomaçãoDevOps•5 min

How to automate Obsidian backups via Git and cron

Learn how to build shell scripts to automatically save and sync your markdown notes using version control and a task scheduler.

HardwareDevOps•4 min

How to measure real GPU power consumption on Linux

Learn how to monitor power draw, temperature, and energy efficiency of your graphics card on Linux using tools like nvidia-smi and sysfs file readings.

RedesDevOps•3 min

How to unblock ports on Linux UFW firewall

Learn how to manage packet filtering rules, open TCP and UDP ports, and check listening service status on Linux UFW firewall step by step.

DevOps•3 min

Stuck Docker container? How to force stop via kernel

Is your Docker container ignoring stop commands? Learn how to kill zombie processes using direct Linux kernel signal manipulation.

DevOpsHardware•3 min

How to generate CPU usage charts in the terminal

Discover lightweight command-line tools to monitor real-time processor usage, identify processing spikes, and analyze hardware bottlenecks directly in your terminal.

DevOpsHardware•4 min

How to recover deleted files on Linux with TestDisk

Learn the step-by-step process to scan raw partitions and restore lost data on Linux directly from the terminal using TestDisk.

DevOps•5 min

How to clear APT cache on Ubuntu via terminal

Learn how to free up disk space on Ubuntu by cleaning obsolete packages and old cache files stored by the APT package manager using practical commands.