tty1 — xnett.org: ~bash — 80×24

xnett.org:~$ ./about.sh

Linux. Infrastructure. AI.

Notes, guides and real-world infrastructure from a Linux engineer.

Practical guides
Open-source tools and software I build and run
Self-hosted everything (when it makes sense)
Automation, containers and scalable infrastructure
GPU, AI and homelab experiments
Built on curiosity. Powered by Linux.

xnett.org:~$ ls ~/

xnett.org:~$

rack01 — /dev/labnominal

  .----------------------------------.
  |  sw-core  [||||||||........]   o |
  |----------------------------------|
  |  [=] node-01  ::::::::::   o o   |
  |----------------------------------|
  |  [=] node-02  ::::::::::   o o   |
  |----------------------------------|
  |  [=] node-03  ::::::::::   o o   |
  |----------------------------------|
  |  [>] gpu-01   nvidia       o o   |
  |      |############|              |
  |----------------------------------|
  |  [#] nas-01   [######..]     o   |
  |----------------------------------|
  |  [~] ups      ~~~~~~~~~~     o   |
  '----------------------------------'
     |_|                        |_|

$ ssh lab — every article starts here

/etc/motd: Senior Linux & Infrastructure Engineer · Norway

stack=Linux, RHEL, AlmaLinux, Ubuntu, Ansible, AWX, Docker, Podman, Kubernetes, Proxmox, KVM, NVIDIA GPU, AI Infrastructure

# selected projects — software I build and run under the Xnett name

ls -l ~/projectstotal 4

[OPEN SOURCE]

layersmith/

A self-hosted web interface for building OCI container images from a distribution, a purpose and a set of tools, without hand-writing every Containerfile.

Active development

[OPEN SOURCE]

ops-center/

A self-hosted operations platform for Linux and Docker hosts: inventory, Ansible automation, patching, monitoring, vulnerability scanning, optional HA, and optional AI agents.

Active development

[PRODUCT]

flokktavla/

A privacy-focused family organiser for a shared calendar, chores, points and rewards, a shopping list and a kitchen wall display. Early development; not launched.

Early development

[PRODUCTION]

den-lille-hagen/

A custom platform built for Den Lille Hagen: public website and web shop, dog-care enquiries, Vipps payments, and the admin tools that run the business day to day.

In production

>cd ~/projects view all projects

# latest articles

/var/www/xnett.org/latest.logtail -n 8

2026-10-0221:46[CONTAINERS]2026-10-02[CONTAINERS]LayerSmith: a self-hosted container image builder6m 2026-09-2922:48[CONTAINERS]2026-09-29[CONTAINERS]What runs in my homelab containers3m 2026-09-2922:48[HOMELAB]2026-09-29[HOMELAB]Proxmox cluster: two mismatched nodes and a quorum lesson3m 2026-09-2922:48[INFRASTRUCTURE]2026-09-29[INFRASTRUCTURE]The homelab network: UniFi from gateway to access points3m 2026-09-2922:48[HOMELAB]2026-09-29[HOMELAB]My homelab, top to bottom*4m 2026-09-1315:40[AI+GPU]2026-09-13[AI+GPU]Ops Center gets MCP: connect AI agents with access control*3m 2026-09-1315:40[INFRASTRUCTURE]2026-09-13[INFRASTRUCTURE]Traffic Map in Ops Center: live observations with useful history*3m 2026-09-1315:40[INFRASTRUCTURE]2026-09-13[INFRASTRUCTURE]Authentication alerts in Ops Center: distinguish logins from web traffic3m

* featured · cd /linux · ls /guides

/var/log/xnett/notes.logless →

2026-09-07[misc]2026-09-07[misc]NVIDIA Container Toolkit version pinning note 2026-09-07[link]2026-09-07[link]Interesting project: NetBird for mesh WireGuard 2026-09-07[debug]2026-09-07[debug]Troubleshooting: systemd unit refuses to restart 2026-09-07[cmd]2026-09-07[cmd]Quick command: find the largest files under a path 2026-09-07[release]2026-09-07[release]RHEL 10.2 release notes: what actually matters

/usr/bin/search

ls -l /srv/xnett/topics

drwxr-xr-xlinux/RHEL, AlmaLinux, Ubuntu, troubleshooting, performance, security and administration.drwxr-xr-xinfrastructure/Datacenter infrastructure, networking, storage, virtualization and architecture.drwxr-xr-xcontainers/Docker, Podman, Kubernetes and container platforms.drwxr-xr-xautomation/Ansible, AWX, scripting, APIs and infrastructure automation.drwxr-xr-xai-gpu/NVIDIA GPUs, CUDA, AI workloads, inference, local LLMs and GPU infrastructure.drwxr-xr-xhomelab/Servers, Proxmox, networking, self-hosting and experiments.

# homelab services — what's running, being tested or broken on purpose

/etc/xnett/lab.statussystemctl list-units --type=service

unit	load	active	sub	description
proxmox-cluster.serviceTwo Proxmox VE nodes, cloud-init VMs from AlmaLinux images, local LVM and NFS backups to the NAS.	loaded	active	running	Proxmox Cluster — Two Proxmox VE nodes, cloud-init VMs from AlmaLinux images, local LVM and NFS backups to the NAS.
unifi-network.serviceUniFi gateway, four switches and four access points, managed from a controller VM.	loaded	active	running	UniFi Network — UniFi gateway, four switches and four access points, managed from a controller VM.
pihole-dns.serviceTwo Pi-hole servers on separate nodes, synced hourly, with local names for internal services.	loaded	active	running	Pi-hole DNS — Two Pi-hole servers on separate nodes, synced hourly, with local names for internal services.
docker-hosts.serviceTwo Docker hosts carrying almost every service, with app data on dedicated volumes.	loaded	active	running	Docker Hosts — Two Docker hosts carrying almost every service, with app data on dedicated volumes.
home-assistant.serviceHome Assistant with MQTT, a Ring doorbell bridge and Frigate recording the cameras.	loaded	active	running	Home Assistant — Home Assistant with MQTT, a Ring doorbell bridge and Frigate recording the cameras.
media-stack.serviceJellyfin for streaming; Sonarr, Jackett and Transmission with media on the NAS over NFS.	loaded	active	running	Media Stack — Jellyfin for streaming; Sonarr, Jackett and Transmission with media on the NAS over NFS.
nextcloud.serviceSelf-hosted files and sync on Nextcloud with MariaDB.	loaded	active	running	Nextcloud — Self-hosted files and sync on Nextcloud with MariaDB.
ops-center.serviceMy own operations platform, active/active across both Docker hosts with a witness VM for quorum.	loaded	active	running	Ops Center — My own operations platform, active/active across both Docker hosts with a witness VM for quorum.
local-llm.serviceOllama and ComfyUI on an RTX 3080 laptop, with Open WebUI as the front end.	loaded	active	running	Local LLMs — Ollama and ComfyUI on an RTX 3080 laptop, with Open WebUI as the front end.
k3s-lab.serviceA small Kubernetes lab VM, started when there is something to test.	loaded	activating	testing	k3s Lab — A small Kubernetes lab VM, started when there is something to test.

10 loaded units listed. LOAD = unit is documented here, ACTIVE = current state in the lab.

# about

/home/r0lfi/whoami

xnett.org

Name: Rolf
Role: Linux / Infrastructure Engineer
Focus: Linux, automation, containers, AI + GPU
Platform: Linux
Interests: Homelab, infrastructure, self-hosting
Location: Norway

I work with enterprise Linux, virtualization, automation, containers and increasingly AI/GPU infrastructure. xnett.org is where I document things I build, problems I solve and technologies I find interesting.

>cat ~/about.md

    .--.
   |o_o |
   |:_/ |
  //   \ \
 (|     | )
/'\_   _/`\
\___)=(___/

xnett.org: ~

xnett.org:~$ whoami

Linux Infrastructure Engineer

xnett.org:~$ cat ~/stack.txt

RHEL · Ubuntu · Ansible · Containers

xnett.org:~$ cat ~/interests.txt

Automation · GPU infrastructure · AI

xnett.org:~$ cat ~/xnett.txt

Linux tips, guides & real-world experience

xnett.org:~$ uptime

Still learning. Still building.

xnett.org:~$ cat ~/contact.txt

[email protected]

xnett.org:~$