Overview Situation An internet connection which uses native IPv6 and supports IPv4 through Dual-Stack Lite. The internet provider assigns the Fritz!Box an IPv6 prefix (/59). A server running Debian 12 should be publicly reachable to provide some services. Due to the Dual-Stack Lite, IPv6 is the only way to publicly expose the server. In the Fritz!Box a corresponding fort forwarding is configured. Problem There’s no control over the assigned IPv6 prefix and it might change whenever the internet connection gets reconnected. As the server has a static local IPv4 address, the second part of the IPv6 address should also be static. ...

The rollout of Debian 12.3 has been paused due to a data corruption issue in the 6.1.64-1 kernel when using the ext4 filesystem: https://www.debian.org/News/2023/2023120902 For amd64, the affected package is linux-image-6.1.0-14-amd64 as it ships kernel 6.1.64-1. It can be prevented from being installed, by setting the Pin-Priority for this version to -1: $ cat /etc/apt/preferences.d/2023-12-10-kernel-ext4-bug # https://www.debian.org/News/2023/2023120902 Package: linux-image-amd64 Pin: version 6.1.64-1 Pin-Priority: -1 Package: linux-image-rt-amd64 Pin: version 6.1.64-1 Pin-Priority: -1 This can be verified using apt-cache policy: ...

I recently ordered a StarBook Mk VIr2 from Star Labs : StarBok Mk VIr2 The StarBok Mk VIr2 The StarBok Mk VIr2 has the following specs: 64 GB DDR4 RAM @ 3200 MHz (2×32 GB) i7-1360P @ 2.20 GHz 2 TB Gen4 PCIe SSD 14" display Ubuntu LTS 22.04.02 coreboot (instead of AMI firmware) US keyboard layout In comparison, my daily driver for many years has been a Lenovo ThinkPad T470s with the following specs: ...

When attempting to burn a CD-ROM using Fedora and Brasero the medium always gets ejected, before anything is written. Apparently, the solution is to set u+s on /usr/bin/wodim: sudo chmod u+s /usr/bin/wodim See https://bugzilla.redhat.com/show_bug.cgi?id=1580021 for reference.

After upgrading MariaDB to 10.5 Seafile stopped working. journalctl showed errors like the following for mariadb.service: [Warning] Aborted connection 62 to db: 'seafile_ccnet-db' user: 'seafile' host: 'localhost' (Got an error reading communication packets) Further investigation revealed the open files limit to be the root cause: root@server:~# mysql -e "SHOW VARIABLES LIKE 'open_files_limit';" +------------------+-------+ | Variable_name | Value | +------------------+-------+ | open_files_limit | 32768 | +------------------+-------+ To increase the limit the corresponding Systemd unit needs to be overriden using systemctl edit mariadb.service. This creates /etc/systemd/system/mariadb.service.d/override.conf: ...

When running many tests involving the database one might encounter the following issue: Illuminate\Database\QueryException: SQLSTATE[HY000] [2006] MySQL server has gone away The issue occurred reliably and always at the same test. Temporarily deleting test classes just made another test triggering the issue. When debugging locally it turns out that the maximum connection limit of MariaDB is the root cause. By default MariaDB comes with a connection limit of 100 connections. Laravel however does not use persistent connections by default and therefore consumes a lot of connections when running tests. ...

When spinning up a new Debian VM using KVM virsh console <vm> does not work. The VM needs a running TTY for this: systemctl enable serial-getty@ttyS0.service systemctl start serial-getty@ttyS0.service

This post describes how I shot a timelapse of an entire year consisting of nearly 10,000 pictures. The Setup The timelapse was shot with a Raspberry Pi 3 Model B and the camera module v2 . The Pi was installed inside so there was no need to protect it against the weather. To better mount it to the wall the Pi was put inside a case . The benefits of having the Pi mounted inside are also stable Wi-Fi access and a more or less stable power supply (more on that later). ...

23.09.2017: Updated instructions for 10.0.x release of GitLab Runner. This post describes how to setup gitlab-runner on an Uberspace using the shell executor. Download gitlab-runner-linux-amd64 Download the Runner binary into the ~/bin directory and make it executable: $ mkdir ~/bin $ cd ~/bin $ wget https://gitlab-runner-downloads.s3.amazonaws.com/latest/binaries/gitlab-runner-linux-amd64 $ chmod +x gitlab-runner-linux-amd64 Create a working directory for the Runner: $ mkdir ~/gitlab-ci Get configuration details for the Runner In your GitLab project navigate to Settings > CI/CD Pipelines. Find the URL for the runner setup and the registration token as shown in the picture below: ...

Starting with Chrome 56 on Debian you might end up having no Extensions. To re-enable them again you have to start Chrome with --enable-remote-extensions To make this a default add this flag to the default flags in /etc/chromium.d/default-flags: # Enable extensions export CHROMIUM_FLAGS="$CHROMIUM_FLAGS --enable-remote-extensions" Reference: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=851927