Technical Articles

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

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Pods stuck in Terminating? How to force remove them in K8s

Learn how to handle pods stuck in the Terminating state in Kubernetes. Discover how to use kubectl delete with timeout and grace-period flags safely.

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DevOps•3 min

How to audit Linux file permissions using the find command

Learn how to detect security flaws and files with improperly open permissions using the power of the find command on your Linux server.

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Hardware•4 min

How to Clone an Old HDD to NVMe SSD Without Reinstalling

Learn the safe step-by-step guide to cloning your operating system from a mechanical hard drive to a fast NVMe SSD without data loss.

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DevOpsEngenharia•4 min

Disk full from logs? How to rotate with logrotate

Learn how to configure log retention and compression policies on production servers using logrotate to prevent out-of-disk failures.

DevOps•4 min

Zombie processes on Linux? How to kill and find origin

Learn what zombie and orphan processes are on Linux, how to spot them in the kernel table, and safe cleanup methods without rebooting.

DevOps•4 min

Slow Docker build? How to use remote cache in CI

Learn how to speed up heavy image builds in continuous integration pipelines by configuring distributed caching layers with Docker Buildx.

RedesDevOps•2 min

Pod network down? How to debug CNI in Kubernetes

Are your pods unable to communicate? Learn how to isolate network failures in Kubernetes using native tools and CNI diagnostics to restore connectivity.

DevOps•5 min

Docker out of space? How to clean cache and free disk

Learn how Docker manages image layers and volumes to safely clean cache and recover precious gigabytes on your hard drive.

RedesDevOps•6 min

How to use tcpdump to inspect network traffic

Learn the fundamentals of packet analysis on Linux using the tcpdump command, with capture filters and header inspection.

DevOpsEngenharia•2 min

Docker container stuck? How to inspect logs and volumes

Is your Docker container failing to start? Learn how to inspect volumes, mount permissions, and environment variables like a pro.

HardwareDevOps•3 min

Homelab crashing? How to diagnose PCIe bus failures

Learn how to track down random freezes in your home server by investigating signaling errors on PCIe lanes using native Linux diagnostic tools.

DevOpsHardware•5 min

How to use the dd command to clone corrupted disks in Linux

Learn how to perform bit-by-bit recovery of damaged storage units in Linux using the dd command while skipping faulty blocks.

RedesDevOps•5 min

How to expose local services with Cloudflare Tunnels

Learn how to set up secure tunnels to expose homelab applications on the internet without opening router ports, keeping your network protected.