Posts about programming, DevOps, Linux server management, and more.
Nix with its ecosystem is amazing tooling and the library functions in nixpkgs provide great builders to package certain programs, scripts, and stuff. But in this jungle of options, it’s also sometimes not clear which option is the best or most pragmatic solution. In this blog post, I’m going to Read more…
Update: The original post is from November 2024. I updated the post in the meantime a couple of times to reflect my latest knowledge. During my work as virtualization engineer at Cyberus Technology, I work from time to time with libvirt. Specifically, I am working with live-migration of QEMU/KVM VMs Read more…
UPDATE: Turns out, I googled the wrong thing/keywords. There is a helpful answer on StackOverflow. It was surprisingly difficult to programmatically start a long-running command via SSH in background and disconnect the SSH session immediately. So, in case you need help, here’s how I did it. The final solution is Read more…
For various reasons, such as OS development, it is convenient to quickly start up an instance of QEMU or Cloud Hypervisor with a custom kernel and initrd. However, often the major struggle is to get some kernel and some initrd, i.e., the boot items, quickly and easily. Scope Foremost, this Read more…
nixos-rebuild –target-host <user@host> is a powerful tool to remotely deploy a NixOS configuration. However, there are scenarios where you can’t reach a machine directly but need an SSH jump host. Suppose you want to deploy to the host 192.168.124.42, which is only reachable from the host ssh-gate. Then your nixos-rebuild Read more…
Recently, I’ve bought a TP-Link Archer TX20U Nano WiFi USB dongle (vendor website) for my desktop PC. The driver for Windows is provided by the stick itself, as it exposes a storage volume with the Windows driver on it. On Linux, the Windows driver doesn’t work, of course. However, with Read more…