Java 25 – Condensed Speed
We look into the new Java version that will be released later this autumn. It has a lot of great performance improvements and good …
What is Accessible PDF?
We look into what Accessible PDF is and how to create one using PDFBox. We also look at the structure and talk about what is …
I played frustrated manager for a week, with a stupid intern (Vibe coding)
I wanted to try out vibe coding, not writing a single line of code, just describing what I wanted using Windsurf and their own model.
Is Windows Sandbox secure?
We try Windows Sandbox, talk about how it works, and what you can do with it. Sadly, there is a security story attached to a …
Is WebAuthn secure? Let's deep dive into the tech.
In this video I look into Webauthn and all the different technologies that is used in order to authenticate users for a simple login.
Predicting the life expectancy of your drives in Ceph.
Since Cephalacon, I’ve been looking into the disk prediction feature in Ceph. Trying to get it to actually work, sadly, it has …
Syncing Clocks with Satellites: How NTP Actually Works
I wanted to understand why the NTP system has so accurate clocks and what an accurate clock actually means and this is a rabbit hole that you might get stuck in for a while. I don’t want to reiterate the resources I’ve seen so I will link them in this write-up. Time is dependent on […]
Migrating libvirt guest machines from one host to another.
In this video, I look into migrating virtualized machines. Both using the normal disk backend and Ceph to see the difference. If you need to move the guest with all the storage devices to a new host. virsh migrate –live –persistent –undefinesource –copy-storage-all –verbose [guest-name] qemu+ssh://node10/system If you need to move the guest with centrally […]
From Box to Benchy and Beyond (Creality K1)
I just bought a 3d printer, and these are my first impressions and thoughts about printing and the result. Save 25% on Coursera …
Make tiny Docker images running Java code
Dockerize java applications with native code I wanted to figure out how to run Java applications in a minimal Docker image. Using GraalVM this could become a reality with a size of 4 MB image. The application could be found in one of my repositories but the main work force is the Dockerfile below. This […]
Install a tiny version of Windows 11 without any inputs. (autounattend.xml)
Windows 11 Tiny Edition Download Windows 11 from the Microsoft website (https://www.microsoft.com/software-download/windows11) Mount the downloaded ISO image using Windows Explorer. Download Git by going to https://git-scm.com/download/win and the download will start automatically. Install git by running the installer. git clone https://github.com/ntdevlabs/tiny11builder.git cd tiny11builder Next up we need a autounattend.xml file and we can create one using this […]
Find Memory Leaks and PHP bottlenecks with Profiling Tools
PHP Profiling In this write up I compare 5 different tools to profile a PHP application both from the console and web. All of them can gather statistics that you later can review. Some of them are online and some of them off line. xdebug Cost: Free Let’s start with the most common one what […]