Linux - The Next GenerationWhile playing with passkeys I asked myself whether my Yubikey could also be used for SSH authentication using passkeys/FIDO2. And it seems for OpenSSH 8.2 and newer this is indeed possible. Its basic setup is described in detail by Yubico. However following that description didn’t work for me. I always got some “sign_and_send_pubkey” error: According […]
I’ve been using Keycloak for quite some time now, and I was looking forward to the new 26.4.0 release – now with official passkey support. Till now I was experimenting with edumfa (a clone of privacyIDEA) in order to get my Yubikey supported for multi factor authentication (MFA). This however required an extra connector (and […]
Some time ago I tried to use my AMD iGPUs (not supported by AMDs ROCm) for LLMs. However I didn’t succeed. Now I read some benchmark for the newest AMD Strix Halo systems performing quite well in some LLM tasks using vulkan instead of ROCm. Building vulkan enabled llama.cpp (using docker) Building llama.cpp using docker […]
Motivation I’m currently playing around with some LLMs for different projects. One project aims to add textual descriptions to a large image gallery. Those descriptions can be used both for better image organization or as alternative texts when publishing them on websites. My basic setup contains ollama for running the LLMs and some python code […]
This seems to apply to the docker version only, and maybe only to older ones that were installed some time ago. What happened Everytime I tried to access the “Insights” menu item on my docker hosted Unifi network application I got a short popup telling me “An error occured while trying to retreive logs” Further […]
Once you start to use fail2ban on more than one machine you’ll get to the point where you’d like to apply the IP blocking to machines other than the local one. While there are other (partially commercial) solutions to do that, I still decided to go with fail2ban. Please consider the following description as a […]
As usual the first step is to find the right tools to start the debugging. For systemd systems (like my Ubuntu LTS 24.04) on helper is resolvectl: Hint: older systems may use systemd-resolve –status instead. Some words about my environment: Some of the settings listed above can be modified here: Quite naively I was expecting […]
Skipping through my log files I found some concerning entries that were not covered by the existing fail2ban config. While trying to figure the correct regular expressions (regexp) to match these entries I had to take a close look at the things fail2ban provides to make things easier. Basic configuration As usual my test are […]
While trying to get my Nextcloud instance to talk to an OpenCloud Test instance I had to dig a little deeper into the unterlying protocol: Open Cloud Mesh (or short OCM, details s. RFC-draft). TL;DR: For everyone keen to get things up and running: I didn’t succeed (yet). And though I really like the idea […]
While investigating whether my AMD is somewhat usable for running LLMs I this is what I found. Preparations Installation of amdgpu driver and ROCm is explained here. Hardware/device information During reboot the amdgpu driver logs some information about the available amount of graphics memory: the reserved VRAM memory and the GTT (graphics translation table) memory […]