https://sebastianzehner.com/categories/techlab/Recent content in TechLab on Sebastian ZehnerHugoenblog@techlab.icu (Sebastian Zehner)blog@techlab.icu (Sebastian Zehner)<span class='custom-footer-icon'></span>2026 Sebastian ZehnerTue, 04 Aug 2026 17:30:00 -0300https://sebastianzehner.com/posts/switching-from-ollama-to-llama-cpp/Tue, 04 Aug 2026 17:30:00 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/switching-from-ollama-to-llama-cpp/llmaiopen-sourcelinuxterminalWhy I switched from Ollama to llama.cpp: more control, 128k context with Qwen3.6 27B, and VRAM management with llama-swap on an RTX 4090.https://sebastianzehner.com/posts/minecraft-fabric-server/Wed, 29 Jul 2026 12:00:00 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/minecraft-fabric-server/minecraftlinuxbashself-hostingopen-sourceterminalA step-by-step guide for setting up a modded Minecraft Fabric server on Linux. From installation through mod selection to running it on your local network.https://sebastianzehner.com/posts/aur-malware-attack-how-to-check-arch-linux-compromised/Tue, 23 Jun 2026 13:40:06 +0000blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/aur-malware-attack-how-to-check-arch-linux-compromised/linuxarch-linuxopen-sourceShould you now delete Arch Linux and switch to Windows? After the AUR malware attack in June 2026, I show how I checked whether my system was affected and how you can do the same.https://sebastianzehner.com/posts/from-papermod-to-blowfish-why-i-switched-my-hugo-theme/Mon, 22 Jun 2026 21:25:07 +0000blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/from-papermod-to-blowfish-why-i-switched-my-hugo-theme/hugoblowfishbloggingwebsitecatppuccinAfter years with PaperMod I switched my Hugo blog to Blowfish. What convinced me, what&rsquo;s different, and why Catppuccin plays a role.https://sebastianzehner.com/posts/cactus-comments-blog-comments-matrix-server/Sat, 18 Apr 2026 17:10:00 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/cactus-comments-blog-comments-matrix-server/matrixcactushomeserverhugosynapseopen-sourceself-hostingHow I integrated Cactus Comments – a decentralized, tracking-free commenting system built on my own Matrix server – into my Hugo blog, including the client build, appservice setup, and Catppuccin styling.https://sebastianzehner.com/posts/self-hosting-matrix-homeserver-synapse/Wed, 08 Apr 2026 14:00:00 +0000blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/self-hosting-matrix-homeserver-synapse/matrixhomeserversynapseopen-sourceself-hostingIn this article, I set up my own Matrix homeserver using Synapse and Docker Compose. Alongside a brief introduction to the decentralized Matrix protocol, I walk through the complete installation with PostgreSQL, Traefik, and Cloudflare Tunnel.https://sebastianzehner.com/posts/installing-dd-wrt-on-the-tl-wr949n-the-complete-guide/Tue, 31 Mar 2026 22:57:00 +0000blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/installing-dd-wrt-on-the-tl-wr949n-the-complete-guide/routerfirmwaredd-wrtHow I flashed the Brazilian TP-Link TL-WR949N router with DD-WRT: including a workaround for the SSID issue related to Error 18005, a step-by-step guide, and information on using TFTP for recovery.https://sebastianzehner.com/posts/ollama-context-window-optimization-opencode/Sat, 10 Jan 2026 22:20:00 +0000blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/ollama-context-window-optimization-opencode/ollamallmopencodeopen-sourceterminalThe Context Window is the “invisible bottleneck” in many Ollama setups. Here are three approaches to optimize its performance, practical tests using various models, and specific recommendations for successfully integrating OpenCode with LLMs.https://sebastianzehner.com/posts/hugo-series-function-multi-part-posts/Mon, 05 Jan 2026 00:35:10 +0000blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/hugo-series-function-multi-part-posts/hugobloggingmarkdownIn line with my planned blog series, I have integrated a series functionality into Hugo. In this tutorial, I will show you how to create multi-part posts with automatic numbering and navigation.https://sebastianzehner.com/posts/md-translator/Wed, 17 Dec 2025 20:00:00 +0000blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/md-translator/hugomarkdownbloggingaillmclaudeMultilingual blogs incur translation costs. Manual translations are expensive, while automated tools often damage the Markdown format. How can one still remain efficient and preserve the original format?https://sebastianzehner.com/posts/docker-compose-homelab-my-journey-connected-container-infrastructure/Fri, 15 Aug 2025 09:04:00 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/docker-compose-homelab-my-journey-connected-container-infrastructure/LinuxDockerComposeContainerHomelabIPvlanNetworkingWith clearly structured volumes, dedicated networks, and a bit of automation, my services run reliably across multiple Linux systems. They are quick to deploy, easy to update, and stable.https://sebastianzehner.com/posts/coral-edge-tpu-hardware-acceleration-for-ai-object-detection/Wed, 13 Aug 2025 09:15:00 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/coral-edge-tpu-hardware-acceleration-for-ai-object-detection/LinuxFrigateAICoralTPUNVRDockerCCTVFor my Frigate Docker container, I wanted to enable AI object detection with hardware acceleration. Therefore, I bought an M.2 Accelerator Coral Edge TPU chip with an A+E key and installed it in my home server.https://sebastianzehner.com/posts/frigate-open-source-nvr-real-time-ai-object-detection/Tue, 12 Aug 2025 18:35:10 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/frigate-open-source-nvr-real-time-ai-object-detection/LinuxFrigateAICoralTPUNVRDockerCCTVFrigate is an open-source Network Video Recorder (NVR) that combines traditional video surveillance with AI-powered real-time detection of people, vehicles, animals, and other objects.https://sebastianzehner.com/posts/nut-in-the-homelab-central-ups-monitoring-and-automation/Thu, 07 Aug 2025 20:35:10 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/nut-in-the-homelab-central-ups-monitoring-and-automation/LinuxUPSNUTDockerBlackoutMy homelab uses several uninterruptible power supplies (UPS) – including models from <strong>Eaton</strong> and <strong>CyberPower</strong> – to protect servers, NAS devices, and network equipment during power outages.https://sebastianzehner.com/posts/rainy-75-pro-this-is-what-my-perfect-keyboard-looks-like/Tue, 05 Aug 2025 09:35:10 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/rainy-75-pro-this-is-what-my-perfect-keyboard-looks-like/linuxkeyboardRainy75ProkeydsetxkbmapIn April 2025, I finally found it: my perfect keyboard. The Rainy 75 Pro from Wobkey isn&rsquo;t just high quality – it completely won me over from the very first keystroke.https://sebastianzehner.com/posts/ipo-shares/Sat, 07 Dec 2024 17:00:00 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/ipo-shares/SharesFinancesCryptocurrencyBitcoinTake action - Seize your “once-in-a-lifetime opportunity” now! Invitation to our confidential presentation.https://sebastianzehner.com/posts/how-to-upload-and-publish-a-hugo-website/Fri, 06 Dec 2024 15:00:00 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/how-to-upload-and-publish-a-hugo-website/HugoWebsitePaperModIn the second part of this series we created some content for your free Hugo website and today we want to upload and publish this content to the internet for free.https://sebastianzehner.com/posts/self-hosted-social-media-management-with-mixpost/Sun, 25 Aug 2024 18:07:53 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/self-hosted-social-media-management-with-mixpost/Social MediaMixpostSimple LifeI had the idea to simplify my social media engagement but without paying a lot of money or even monthly subscription fees. I found Mixpost as a self-hosted social media management solution. Today I share my experience.https://sebastianzehner.com/posts/how-to-create-content-for-your-free-hugo-website/Tue, 13 Aug 2024 16:05:39 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/how-to-create-content-for-your-free-hugo-website/WebsiteHugoPaperModToday I will show you how to create content with a Hugo website, how to add a menu, tags and categories and how to make some special settings.https://sebastianzehner.com/posts/how-do-we-sign-our-ssl-certificates-with-openssl-for-local-web-services/Wed, 31 Jul 2024 20:53:58 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/how-do-we-sign-our-ssl-certificates-with-openssl-for-local-web-services/OpenSSLHTTPSCertificatesLANIn this blog post, I document how we create self-signed SSL certificates and use them securely in the local network. A local web server is running on an older Raspberry Pi in my Homelab.https://sebastianzehner.com/posts/how-to-build-a-minimalistic-and-self-hosted-website-for-free/Mon, 22 Jul 2024 10:29:42 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/how-to-build-a-minimalistic-and-self-hosted-website-for-free/WebsiteHugoPaperModYou&rsquo;re here on my new minimalistic and free website. I built this website some weeks ago because I like it simple and replaced WordPress with Hugo and PaperMod Theme for my personal blog on the Internet.https://sebastianzehner.com/posts/how-i-paid-for-my-domain-with-cryptocurrency/Fri, 19 Jul 2024 10:17:58 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/how-i-paid-for-my-domain-with-cryptocurrency/HostingerCryptocurrencyTronDomainIn today&rsquo;s digital world, domains are an essential part of any website. But what if you have the flexibility to pay for your domain with cryptocurrency?https://sebastianzehner.com/posts/my-new-minimalistic-and-free-website/Mon, 08 Jul 2024 16:20:40 -0300blog@techlab.icu (Sebastian Zehner)https://sebastianzehner.com/posts/my-new-minimalistic-and-free-website/hugoPaperModwebsitesimple lifeThis is my first new post on this website.