Today I changed some things regarding authentication in my local setup and (once again) was curious about enabling more services to user kerberos logins. And – as always – I ended up in an extensive debug session in order to make (some) things work. To spare some of you some of your precious time I’ll […]
I recently got a few NordVPN licenses, so I gave it a try. The GUI client on Linux seems extremely limited, so settings things up requires some good old shell commands. Basic installation/setup Documentation can be found here: At that point you’ll need to reboot in order to apply the new group membership (at least […]
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3D-Printer: Bambu Lab A1
This is about the newest member of my geek collection: My new Bambu Lab A1 3D Printer. Cloud or LAN-only? First of all: The Bambu printer series seems to be quite cloud centric, there is however a LAN-only mode (with limited functionality and even less documentation). As I am planning to use the printer in […]
I’ve been running SAML based SSO using Simplesamlphp for some time now. While its PHP based approach is very flexible (and configuration is easy compared to Java-based Shibboleth) there are still quite some things you need to know to get started. Keycloak is an alternative that’s not as flexible to use (as far as I’ve […]
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Filesystem speeds
The tests were done on a Quad-Core i5 system, using a 24 GB RAM disk (32 GB RAM total). System is Ubuntu 20.04 (x86_64). Basic test were done using fio with variations of this command: The different benchmark scenarios are these: Create filesystem on RAM disk, create big test file, run fio. And the same […]
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sssd and Samba Active Directory
Ever wondered how to join an Linux PC to your Active Directory (or even better to your Samba relative)? That’s exactly what this article is about. But first of all some words about what components we need to involve: As a first step we need to install the required packages: First of all we need […]
Update 11.12.2021: Finally got a new test machine and started re-evaluating the current situation. The tests were done on a Quad-Core i5 system, using a 24 GB RAM disk (32 GB RAM total). System is Ubuntu 20.04 (x86_64). Basic test were done using fio with variations of this command: The different benchmark scenarios are these: […]
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Using Kindle’s ePaper
Since I didn’t use my kindle (very often I was looking for an alternative use case for it. However to make this device usable for other purposes than the intended ones it had to be jailbreaked. Documentation about this process can be found here:Jailbreak, Tools (Snapshots) My device was identified as “Kindle PaperWhite 3 (2015) […]
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NFS version 3 and 4 compared
There have been quite some changes between versions 3 and 4 of the NFS protocol. From an administrator’s perspective, the following changes were introduced: User / group id mapping:Version 3 and below used a numeric user / group id based mapping: so a user with user id 1000 on the client was mapped to a […]
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Live streaming webcam using ffmpeg
First of all we need to list available Video4Linux devices: Followed by their capabilities. This can be done either using v4l2-ctl or with the converter tool ffmpeg itself: Next step: Generate DASH and HLS compatible stream. HLS was created by Apple and is used on their devices – DASH however seems to be the more […]