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John RushAug 22, 2026 • 5 min read

An unlikely experiment

There are so many great places to learn about out there on the internet, and one of those great...

#c#programming#linux#performance

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abeni16Aug 23, 2026 • 1 min read

VeloxDB : database admin tool for Linux

VeloxDB is an open-source database management tool built with Rust and Tauri 2, available for Linux....

#ai#database#linux

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Kubernetes Networking [Level-9: Kubernetes Networking Internals]

ADITYA RAJAug 24, 2026 • 16 min read

Kubernetes Networking [Level-9: Kubernetes Networking Internals]

This is Level 9 of our Kubernetes networking series — and it's where everything we've learned finall...

#architecture#kubernetes#linux#networking

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Asep SayyadAug 20, 2026 • 16 min read

Sudo vs Root: What's the Difference?

The architectural differences between the root account and sudo delegation, how the SUID bit works,....

#linux#ubuntu#devops#archlinux

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Building a 24/7 Home Security NVR Using Frugal Hardware and a Raspberry Pi 3 Bridge

whatelseAug 23, 2026 • 6 min read

Building a 24/7 Home Security NVR Using Frugal Hardware and a Raspberry Pi 3 Bridge

How to turn a 10-year-old Dell laptop into a 24/7 NVR host, use a 7-year-old Raspberry Pi 3 as a ded...

#raspberrypi#linux#python#networking

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Podman publishes the same port and your firewall still holds. Even as root.

MitoAug 24, 2026 • 5 min read

Podman publishes the same port and your firewall still holds. Even as root.

TL;DR: On the same box, same port, same ufw config where Docker published straight past the firewall...

#podman#docker#security#linux

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Linux Security Checklist for Production Servers

Asep SayyadAug 23, 2026 • 14 min read

Linux Security Checklist for Production Servers

A step-by-step practical guide to locking down SSH, configuring firewalls, enforcing least...

#linux#server#devops#ubuntu

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Minor KeithAug 24, 2026 • 15 min read

Backing up a homelab with restic

I have written a lot here about running things at home and almost nothing about not losing them,...

#linux#devops#database#tutorial

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How I built a kernel-enforced sandbox for LLM agent tool calls

Padmaja Kotoky6d ago • 3 min read

How I built a kernel-enforced sandbox for LLM agent tool calls

Every team running LLM agents with shell access has the same problem: the agent calls a tool, the...

#linux#security#cpp#agents

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I built an eBPF ransomware detector in Rust

Bartosz Osiej5d ago • 4 min read

I built an eBPF ransomware detector in Rust

How I created Halcyon — a real-time ransomware tracker using eBPF kernel tracing, per-CPU perf buffe...

#rust#ebpf#linux#security

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What Actually Happens When Linux Runs Out of Memory: Inside the OOM Killer

MukeshAug 23, 2026 • 4 min read

What Actually Happens When Linux Runs Out of Memory: Inside the OOM Killer

Your process didn't crash. There's no stack trace, no exception, no core dump. One second it's...

#linux#devops#cloudcomputing#backend

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tar backed up your Pi's WiFi config and exited 0. The archive holds one empty directory.

Mito5d ago • 9 min read

tar backed up your Pi's WiFi config and exited 0. The archive holds one empty directory.

TL;DR: On a stock Trixie Pi OS image, the WiFi credentials for the connection this Pi actually uses....

#raspberrypi#linux#networking#sysadmin

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isolcpus= takes CPUs off the scheduler. Hardware IRQs still land there.

Kernel notes (sunshout)6d ago • 2 min read

isolcpus= takes CPUs off the scheduler. Hardware IRQs still land there.

The blunt tool is still in a lot of GRUB files: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0,1" ....

#linux#kernel#networking#sysadmin

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KVM SR-IOV: intel_iommu=on is not SR-IOV until you create VFs

Kernel notes (sunshout)6d ago • 2 min read

KVM SR-IOV: intel_iommu=on is not SR-IOV until you create VFs

A lot of homelab notes stop at GRUB: pci=assign-busses iommu=pt intel_iommu=on Enter...

#kvm#linux#networking#virtualization

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The Linux DMA API: Coherent and Streaming Mappings Explained

Raghu BharadwajAug 21, 2026 • 11 min read

The Linux DMA API: Coherent and Streaming Mappings Explained

A working guide to the Linux DMA API: coherent vs streaming mappings, cache sync rules, the dma-cohe...

#linux#kernel#embedded#drivers

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The error pointed at the GPU. The culprit was the HBA. — a Proxmox passthrough recovery

JJozzieTechAug 20, 2026 • 11 min read

The error pointed at the GPU. The culprit was the HBA. — a Proxmox passthrough recovery

The plan looked textbook. PCIe passthrough an NVIDIA RTX A4000 from a Proxmox 8 host into an Ubuntu....

#proxmox#homelab#virtualization#linux

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Incremental Backup Using pg_basebackup in PostgreSQL 18

Vahid YousefzadehAug 19, 2026 • 7 min read

Incremental Backup Using pg_basebackup in PostgreSQL 18

In this article, I will show how to create a full backup and an incremental backup using...

#postgres#database#linux#ai

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In-Tree vs Out-of-Tree Driver: Where Your Code Should Live

Raghu BharadwajAug 22, 2026 • 7 min read

In-Tree vs Out-of-Tree Driver: Where Your Code Should Live

In-tree vs out-of-tree driver: why upstreaming hardware you own usually costs less over a product li...

#linux#kernel#embedded#yocto

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Justin - FromTheArchitectAug 20, 2026 • 8 min read

Two YubiKeys, One Prompt Too Many

I carry two YubiKeys. One lives on my keyring, one lives in a drawer, and both are enrolled...

#ssh#yubikey#fido2#linux

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Minecraft Server - Part 3: Running on Kubernetes

Celso NeryAug 21, 2026 • 3 min read

Minecraft Server - Part 3: Running on Kubernetes

🇧🇷 Versão em português Minecraft Server - Part 3: Running on Kubernetes In Part 2 of t...

#minecraft#linux#selfhosted#devops

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systemd vs BusyBox init: Which Init System Fits Your Device?

Raghu Bharadwaj5d ago • 14 min read

systemd vs BusyBox init: Which Init System Fits Your Device?

systemd vs BusyBox init for embedded Linux: what each one costs in size, dependencies and kernel ver...

#linux#embedded#yocto#architecture

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Servidor Minecraft - Parte 2: Rodando com Docker