Update imprint with address.

Add git-info shortcode.

.devcontainer/devcontainer.json

@@ -0,0 +1,41 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/docker-existing-docker-compose
+{
+	"name": "Existing Docker Compose (Extend)",
+
+	// Update the 'dockerComposeFile' list if you have more compose files or use different names.
+	// The .devcontainer/docker-compose.yml file contains any overrides you need/want to make.
+	"dockerComposeFile": [
+		"../docker-compose.yml",
+		"docker-compose.yml"
+	],
+
+	// The 'service' property is the name of the service for the container that VS Code should
+	// use. Update this value and .devcontainer/docker-compose.yml to the real service name.
+	"service": "server",
+
+	// The optional 'workspaceFolder' property is the path VS Code should open by default when
+	// connected. This is typically a file mount in .devcontainer/docker-compose.yml
+	"workspaceFolder": "/workspaces/${localWorkspaceFolderBasename}"
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	// "features": {},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.>
+	// "forwardPorts": [],
+
+	// Uncomment the next line if you want start specific services in your Docker Compose config.
+	// "runServices": [],
+
+	// Uncomment the next line if you want to keep your containers running after VS Code shuts down.
+	// "shutdownAction": "none",
+
+	// Uncomment the next line to run commands after the container is created.
+	// "postCreateCommand": "cat /etc/os-release",
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as an existing user other than the container default. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "devcontainer"
+}

.devcontainer/docker-compose.yml

@@ -0,0 +1,26 @@
+version: '3.8'
+services:
+  # Update this to the name of the service you want to work with in your docker-compose.yml file
+  server:
+    # Uncomment if you want to override the service's Dockerfile to one in the .devcontainer 
+    # folder. Note that the path of the Dockerfile and context is relative to the *primary* 
+    # docker-compose.yml file (the first in the devcontainer.json "dockerComposeFile"
+    # array). The sample below assumes your primary file is in the root of your project.
+    #
+    # build:
+    #   context: .
+    #   dockerfile: .devcontainer/Dockerfile
+
+    volumes:
+      # Update this to wherever you want VS Code to mount the folder of your project
+      - ..:/workspaces:cached
+
+    # Uncomment the next four lines if you will use a ptrace-based debugger like C++, Go, and Rust.
+    # cap_add:
+    #   - SYS_PTRACE
+    # security_opt:
+    #   - seccomp:unconfined
+
+    # Overrides default command so things don't shut down after the process ends.
+    # command: sleep infinity
+ 

.github/dependabot.yml

@@ -0,0 +1,12 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for more information:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+# https://containers.dev/guide/dependabot
+
+version: 2
+updates:
+ - package-ecosystem: "devcontainers"
+   directory: "/"
+   schedule:
+     interval: weekly

assets/scss/_predefined.scss

@@ -4,9 +4,9 @@ $text: hsl(204, 28%, 93%);
 $light-grey: #292e32; // #494f5c;
 $dark-grey: #3B3E48;
 $highlight-grey: #7d828a;
-$midnightblue: #2c3e50;
 $typewriter: hsl(172, 100%, 36%);
-$codebackground: #272822 !default;
+$codebackground: #1c2023 !default;
+$midnightblue: $codebackground;
 
 // Scroll to Top Default colors
 

config.toml

@@ -13,7 +13,7 @@ pygmentsUseClasses  = true
 
 rssLimit = 10
 
-copyright = "2024 Daniel Kraus"
+copyright = "2024-2025 Daniel Kraus"
 enableEmoji = true
 
 [permalinks]
@@ -98,13 +98,17 @@ expiryDate = ["expiryDate"]
   initialPublish = "Initally Posted on: "
   human = ["single","posts"]
   
+  [[params.socialLinks]]
+    name = "bluesky"
+    url = "https://bsky.app/profile/bovender.bsky.social"
+
   [[params.socialLinks]]
     name = "mastodon"
     url = "https://neph.social/@daniel_kraus"
 
-  [[params.socialLinks]]
-    name = "x"
-    url = "https://twitter.com/bovender_de"
+  # [[params.socialLinks]]
+  #   name = "x"
+  #   url = "https://twitter.com/bovender_de"
 
   [[params.socialLinks]]
     name = "github"
@@ -134,3 +138,8 @@ expiryDate = ["expiryDate"]
     name = "Impressum"
     url = "impressum/"
     weight = 30
+
+  [[menu.main]]
+    name = "Cheat sheet"
+    url = "cheatsheet/"
+    weight = 15

content/about/index.md

@@ -22,18 +22,31 @@ calculator back in the 1980's.
 
 ### [ggap-ev.org](https://ggap-ev.org)
 
+GGAP is a registered charity in Germany. This NGO uses donated money to fund the
+vocational training of young adults on the Philippines who would otherwise have
+to "earn" their living in an unlawful way.
+
 {{< figure src="ggap-ev.png">}}
 
 ### [nephrowiki.de](https://nephrowiki.de)
 
+NephroWiki is a closed wiki system that has been up and running since 2011.
+
 {{< figure src="nephrowiki.png">}}
 
 ## Portfolio -- software
 
 ### [Daniel's XL Toolbox](https://xltoolbox.net)
 
+Daniel's XL Toolbox is an add-in for Excel that assists with data analysis
+and visualization.
+
 {{< figure src="xltoolbox.png">}}
 
+Even though I haven't been able to work on this project for quite some time,
+I am very happy to see that the latest release has been downloaded more than
+100,000 times. :-)
+
 ### [LinkTitles](https://github.com/bovender/linktitles)
 
 LinkTitles is a [MediaWiki](https://mediawiki.org) extension that automatically
@@ -44,6 +57,10 @@ links terms to existing pages in a Wiki.
 PubmedParser is a [MediaWiki](https://mediawiki.org) extension to include and
 reference articles from [Pubmed](https://pubmed.gov) by PMID.
 
+### Github Star History
+
+[![Star History Chart][sh-img]][sh-link]
+
 ## Server administration
 
 I have 10+ years experience with running and administrating my own server.
@@ -51,3 +68,7 @@ This includes running a mail and an IMAP server, hosting my own
 [Nextcloud](https://nextcloud.com) and [Gitea](https://gitea.io) instances,
 [Mastodon for Nephrology](https://neph.social)
 and more. Almost all of my services are dockerized.
+
+
+[sh-img]: https://api.star-history.com/svg?repos=bovender/linktitles,bovender/pubmedparser,bovender/imapcli,bovender/xltoolbox&type=Date
+[sh-link]: https://www.star-history.com/#bovender/linktitles&bovender/pubmedparser&bovender/imapcli&bovender/xltoolbox&Date

content/cheatsheet.md

@@ -0,0 +1,97 @@
+---
+title: bovender's personal cheat sheet
+description: >
+  On this page, I collect bits and pieces of information that I
+  never seem to be able to memorize. This stuff is helpful for me
+  and maybe it is helpful for you, too, internet wanderer.
+date: 2024-11-05T08:00:00+0100
+draft: false
+---
+{{< git-info >}}
+{{< param "description" >}}
+
+## R
+
+### Print R objects so that they can be re-generated from code
+
+```r
+# dput takes an R object
+dput(x, file = "", control = c("keepNA", "keepInteger", "niceNames", "showAttributes"))
+dget(file, keep.source = FALSE)
+
+# dump takes a list of R object names
+dump(list, file = "dumpdata.R", append = FALSE, control = "all", envir = parent.frame(), evaluate = TRUE)
+```
+
+Example:
+
+``` r
+library(dplyr)
+my_data <-
+  starwars |>
+  select(species, homeworld)
+dput(my_data)
+#> structure(list(species = c("Human", "Droid", "Droid", "Human", 
+#> "Human", "Human", "Human", "Droid", "Human", "Human", "Human", 
+#> "Human", "Wookiee", "Human", "Rodian", "Hutt", "Human", NA, "Yoda's species", 
+#> "Human", "Human", "Droid", "Trandoshan", "Human", "Human", "Mon Calamari", 
+#> "Human", "Human", "Ewok", "Sullustan", "Human", "Neimodian", 
+#> "Human", "Human", "Gungan", "Gungan", "Gungan", "Human", "Toydarian", 
+#> "Dug", "Human", "Human", "Zabrak", "Twi'lek", "Twi'lek", "Aleena", 
+#> "Vulptereen", "Xexto", "Toong", "Human", "Cerean", "Nautolan", 
+#> "Zabrak", "Tholothian", "Iktotchi", "Quermian", "Kel Dor", "Chagrian", 
+#> NA, NA, "Human", "Geonosian", "Mirialan", "Mirialan", "Human", 
+#> "Human", "Human", "Human", "Clawdite", "Besalisk", "Kaminoan", 
+#> "Kaminoan", "Human", "Droid", "Skakoan", "Muun", "Togruta", "Kaleesh", 
+#> "Wookiee", "Human", NA, "Pau'an", "Human", "Human", "Human", 
+#> "Droid", "Human"), homeworld = c("Tatooine", "Tatooine", "Naboo", 
+#> "Tatooine", "Alderaan", "Tatooine", "Tatooine", "Tatooine", "Tatooine", 
+#> "Stewjon", "Tatooine", "Eriadu", "Kashyyyk", "Corellia", "Rodia", 
+#> "Nal Hutta", "Corellia", "Bestine IV", NA, "Naboo", "Kamino", 
+#> NA, "Trandosha", "Socorro", "Bespin", "Mon Cala", "Chandrila", 
+#> NA, "Endor", "Sullust", NA, "Cato Neimoidia", "Coruscant", "Naboo", 
+#> "Naboo", "Naboo", "Naboo", "Naboo", "Toydaria", "Malastare", 
+#> "Naboo", "Tatooine", "Dathomir", "Ryloth", "Ryloth", "Aleen Minor", 
+#> "Vulpter", "Troiken", "Tund", "Haruun Kal", "Cerea", "Glee Anselm", 
+#> "Iridonia", "Coruscant", "Iktotch", "Quermia", "Dorin", "Champala", 
+#> "Naboo", "Naboo", "Tatooine", "Geonosis", "Mirial", "Mirial", 
+#> "Naboo", "Serenno", "Alderaan", "Concord Dawn", "Zolan", "Ojom", 
+#> "Kamino", "Kamino", "Coruscant", NA, "Skako", "Muunilinst", "Shili", 
+#> "Kalee", "Kashyyyk", "Alderaan", "Umbara", "Utapau", NA, NA, 
+#> NA, NA, NA)), row.names = c(NA, -87L), class = c("tbl_df", "tbl", 
+#> "data.frame"))
+```
+
+<sup>Created on 2024-11-05 with [reprex v2.1.1](https://reprex.tidyverse.org)</sup>
+
+### Calculate percentages of subgroups
+
+Principle: `Group` the dataset and `summarize` by counting (`n()`), drop the last group
+while doing so, then `mutate` the dataset by adding the count divided by the sum of counts.
+
+Hint to better understand the example: Look at the sexes in black-eyed subjects.
+
+``` r
+library(dplyr)
+starwars |>
+  group_by(eye_color, gender) |>
+  summarize(n = n(), .groups = "drop_last") |>
+  mutate(p = n/sum(n))
+#> # A tibble: 23 × 4
+#> # Groups:   eye_color [15]
+#>    eye_color gender        n      p
+#>    <chr>     <chr>     <int>  <dbl>
+#>  1 black     feminine      2 0.2   
+#>  2 black     masculine     8 0.8   
+#>  3 blue      feminine      6 0.316 
+#>  4 blue      masculine    12 0.632 
+#>  5 blue      <NA>          1 0.0526
+#>  6 blue-gray masculine     1 1     
+#>  7 brown     feminine      4 0.190 
+#>  8 brown     masculine    15 0.714 
+#>  9 brown     <NA>          2 0.0952
+#> 10 dark      masculine     1 1     
+#> # ℹ 13 more rows
+```
+
+<sup>Created on 2024-11-05 with [reprex v2.1.1](https://reprex.tidyverse.org)</sup>

content/impressum.md

@@ -3,15 +3,16 @@ title: "Impressum und Datenschutz"
 date: 2024-07-31T12:42:53Z
 draft: false
 ---
-
 Dr. Daniel Kraus  
-H‌ö‌hen‌str‌aße 1‌5  
-65451 K‌e‌l‌s‌t‌e‌r‌b‌a‌c‌h  
 Tel. (0 61 07‌) 7 5‌6 88 4‌0  
-<bovender@bovender.de>
+Mail: <bovender@bovender.de>  
 
-Ich bitte, von Anrufen abzusehen. Über Mail oder die verlinkten
-sozialen Netzwerke (siehe Icons) bin ich i.d.R. kurzfristig
+Ladungsfähige Anschrift bei meinem Arbeitgeber: Unimedizin Mainz, Langenbeckstr.
+1, 55131 Mainz. Dies ist eine rein private Homepage und in keiner Weise von
+meinem Arbeitgeber beworben oder unterstützt. Meine Privatanschrift ist zu
+meinem persönlichen Schutz und dem Schutz meiner Familie hier nicht
+veröffentlicht. **Ich bitte, von Anrufen abzusehen.** Über Mail oder die
+verlinkten sozialen Netzwerke (siehe Icons) bin ich i.d.R. kurzfristig
 erreichbar.
 
 ## Mailserver bovender.de

content/posts/2024/p14s/index.md

@@ -248,6 +248,27 @@ replace `ffmpeg-free` with the non-free `ffmpeg` on F40:
 After doing that and restarting Kdenlive, I was able to render my project using
 the H.264 and H.265 codecs as I used to be able to do with Ubuntu-based systems.
 
+## Update 2024-11-10
+
+In the last couple of months, battery life has improved significantly. As
+described above, in summer, battery drained almost completely (from ~90% to
+~15%) within 3.5 hours even without heavy workload.
+
+Today I spent about the same amount of time on a train, working constantly on my
+laptop (browsing, downloading articles), and the battery level only dropped from
+~90% to ~40% within 3 hours. Some system update, be it a kernel update or some
+other software running in the background, must have reduced energy consumption
+considerably :-)
+
+{{< figure src="p14s-battery-drain-2.png">}}
+
+(I am well aware that there are laptops whose battery run time is in an entirely
+different ball park, and even some of my own Thinkpads used to do better, but
+I'm overall quite happy with battery life on this machine with bright 3k display
+and dedicated GPU. I _could_ have bought a machine which can run on battery like
+forever, but that's not my use case and plus, I'd never buy anything else but a
+Thinkpad...)
+
 [Darktable]: https://darktable.org
 [fancontrol]: https://ounapuu.ee/posts/2022/09/26/minimum-viable-fan-control-script/
 [Fedora]: https://fedoraproject.org/

content/posts/2024/plasma-5-tiling-manager/index.md

@@ -29,3 +29,12 @@ Link: <https://kde.org/announcements/plasma/5/5.27.0/>
 
 I wish there were keyboard shortcuts to move windows into one of the custom tile
 layouts as well: <https://discuss.kde.org/t/keyboard-shortcuts-for-new-tiling-feature/1843>
+
+---
+
+### Added 2025-03-02
+
+With Plasma 5.3, you can now define keyboard shortcuts to move a window to
+a custom tile. On my system, there were now shortcuts defined by default, but
+it is very easy to do so in `System Settings > Shortcuts > KWin`. I have now
+mapped `META`+`SHIFT` and the arrow keys to move windows to custom tiles.

content/posts/2025/install-pynitrokey/index.md

@@ -0,0 +1,58 @@
+---
+title: Install pynitrokey on Fedora 41
+description: Here's how I installed pynitrokey on my Fedora 41 KDE laptop, resolving missing dependencies.
+date: 2025-03-30T10:53:35+0100
+draft: false
+# ShowLastmod: true
+toc: false
+scrolltotop: true
+images: []
+tags:
+  - security
+  - Linux
+  - Fedora
+---
+
+{{< figure src="IMGP0069.jpg"
+    alt="My Nitrokey 3A mini"
+    title="My Nitrokey 3A mini on the right side of the picture" >}}
+
+I use [Yubikey][]s and [Nitrokey][]s as a second factor during 2FA
+authentication.
+
+My experiences with Nitrokey devices have been mixed. Currently my 3A mini
+stopped working. I wanted to investigate what's going on, only to find out that
+the commandline tool `nitropy` no longer worked on my machine either! :-(
+
+Here's how I got it to work again. I'm a Python noob, so maybe there's a better
+way to install the dependencies. The operating system is Fedora 41.
+
+```bash
+sudo dnf install systemd-devel python3-devel
+pipx install pynitrokey
+```
+
+Afterwards I was greeted with this:
+
+```text
+$ nitropy nk3 test
+Command line tool to interact with Nitrokey devices 0.8.1
+Critical error:
+No connected NK3 devices found
+
+--------------------------------------------------------------------------------
+Critical error occurred, exiting now
+Unexpected? Is this a bug? Would you like to get support/help?
+- You can report issues at: https://support.nitrokey.com/
+- Writing an e-mail to support@nitrokey.com is also possible
+- Please attach the log: '/tmp/nitropy.log._p6mpa3e' with any support/help request!
+- Please check if you have udev rules installed: https://docs.nitrokey.com/nitrokeys/nitrokey3/firmware-update#troubleshooting-linux
+```
+
+I made sure that I had the abovementioned `udev` rules in place. The key is not
+detected by any system, be it my personal Linux laptop or any Windows machine
+that I could access. [D'oh][]!
+
+[Nitrokey]: https://www.nitrokey.com
+[Yubikey]: https://www.yubico.com
+[d'oh]: https://en.wikipedia.org/wiki/D'oh!

content/posts/2025/leaving-x/index.md

@@ -0,0 +1,40 @@
+---
+title: Leaving X
+description: German academic institutions are leaving Twitter/X. I'm not an academic institution, but still I'm following suit.
+date: 2025-01-14T21:30:00+0100
+draft: false
+# ShowLastmod: true
+toc: false
+scrolltotop: true
+images: []
+tags:
+  - academia
+  - social media
+---
+Several academic institutions in Germany have decided to terminate their
+presence on X, formerly known as Twitter.
+
+Press release of the "Informationsdienst Wissenschaft" (scientific news service,
+in German): <https://idw-online.de/de/news845520>
+
+Ironically, the press release page has several buttons to share this information
+on social media, right now still including a sharing button for X :smile:
+Surely just a matter of time.
+
+{{< figure src="press-release-with-x-sharing-button.png"
+           title="Press release (in German) informing about German academic institutions leaving X, with X sharing button." >}}
+
+I got aware of this by reading my former university's newsletter:
+<https://www.uni-wuerzburg.de/aktuelles/einblick/single/news/universitaet-wuerzburg-kehrt-plattform-x-den-ruecken-1>
+
+I'm following suit. I've just now deleted my account on X.
+
+{{< figure src="account-deactivated.png"
+           title="I did it! My account on X has been deactivated. (Screenshot in German.)" >}}
+
+If you would like to connect with me on social media, please head over to my profiles on [Mastodon][] or [Bluesky][].
+
+See you!
+
+[Mastodon]: https://neph.social/@daniel_kraus
+[Bluesky]: https://bsky.app/profile/bovender.bsky.social

content/posts/2025/media-mounts-at-dm/index.md

@@ -0,0 +1,80 @@
+---
+title: "[In German] USB-Sticks in den Fotostationen von dm"
+description:
+date: 2025-03-22T22:20:07+0100
+draft: false
+# ShowLastmod: true
+toc: false
+scrolltotop: true
+images: []
+tags:
+  - German
+---
+
+(This post is in German.)
+
+In den letzten Wochen habe ich ein paar Mal Fotoabzüge benötigt und bin mit
+einem USB-Stick zur örtlichen Drogerie. Zu meiner Überraschung konnten keinerlei
+Bilder auf dem Stick gefunden werden. Inzwischen habe ich das mit mehreren
+Sticks und an verschiedenen Foto-Stationen (aber immer in demselben Laden)
+probiert, Fehlanzeige. Interessanterweise hat es mit einer SD-Karte problemlos
+geklappt.
+
+Offenbar bin ich weder der erste noch der einzige, der dieses Problem schon
+einmal hatte, es gibt zu einem ähnlichen Problem mit einer CEWE-Fotostation
+einen [Forumsthread][].
+
+In diesem Blog-Beitrag sammele ich einfach mal meine Beobachtungen, vielleicht
+hilft es ja einmal jemandem. Von Mal zu Mal werde ich dies updaten.
+
+## Beispiele für "geht" und "geht nicht"
+
+Ich hatte zuletzt zwei Speichermedien dabei, einen USB-Stick und eine SD-Karte:
+
+```plain
+$ lsblk -f
+NAME        FSTYPE FSVER LABEL       UUID                                 FSAVAIL FSUSE% MOUNTPOINTS
+sda
+└─sda1      exfat  1.0   [REDACTED]  E7F3-FDF9                             114,5G     0% /run/media/daniel/[REDACTED]
+sdb
+└─sdb1      exfat  1.0               7FDE-A701                               119G     0% /run/media/daniel/7FDE-A701
+```
+
+`sda` ist ein USB-Stick, den ich häufig in anderen Zusammenhängen im Einsatz
+habe. `sdb` ist eine ältere SD-Karte. Beide haben nominell 128 GB Kapazität, und
+beide haben eine Partitionstabelle im herkömmlichen MSDOS-Format und eine
+Primärpartition, die mit dem Dateisystem EXFAT formatiert ist. Das Dateisystem
+auf dem USB-Stick hat ein Label, welches aus wenigen Buchstaben ohne
+Sonderzeichen besteht.
+
+Auf beiden Speichermedien hatte ich denselben Foto-Ordner kopiert, mit etwa
+einer Handvoll Fotos. Die Bilder lagen also auf beiden Medien in einem
+Unterorder.
+
+**Interessanterweise wurden die Bilder auf der SD-Karte gefunden, die Bilder auf
+dem USB-Stick jedoch nicht.**
+
+Hier meine Beobachtungen im einzelnen, denn entsprechende Überlegungen findet
+man auch im Netz:
+
+### Dateisystem
+
+Bevor ich es sowohl mit dem Stick als auch mit der SD-Karte probierte, habe ich
+folgende Dateisysteme auf dem USB-Stick ausprobiert:
+
+- EXFAT
+- FAT32
+
+Mit beiden Dateisystemen wurden keine Bilder gefunden.
+
+### Root-Verzeichnis vs. Unterverzeichnis
+
+Es hat keinen Unterschied gemacht, ob ich die Bilder (JPG-Dateien) im
+Wurzelverzeichnis oder in einem Unterordner auf dem Stick hatte.
+
+### Verschiedene Terminals
+
+Ich habe meinen USB-Stick an verschiedenen Foto-Terminals ausprobiert, an keinem
+von ihnen wurden die Bilder gefunden.
+
+[Forumsthread]: https://www.cewe-community.com/forum/fb/viewtopic.php?t=13036&p=135162

content/posts/2025/nvidia-drivers-on-fedora/index.md

@@ -0,0 +1,127 @@
+---
+title: "Nvidia Drivers on Fedora"
+description: >
+  My own up-to-date instructions for installing Nvidia drivers on a Fedora Linux system.
+date: 2025-03-02T08:28:26Z
+draft: false
+# ShowLastmod: true
+toc: false
+scrolltotop: true
+images: []
+tags:
+  - nvidia
+  - fedora
+  - linux
+---
+
+My [Thinkpad P14s]({{< relref "p14s" >}}) has a dedicated Nvidia GPU, which
+requires proprietary drivers. There is a gazillion of instructions on the web
+for installing theses drivers on a Fedora system. Every now and then (with
+kernel updates, I guess), my drivers stop working and I have to research _again_
+how to (re-)install these drivers. Usually I notice this when developing raw
+images with [Darktable][]. It gets dead slow and then I find out that OpenCL is
+not working.
+
+This post mainly serves as a reminder for myself how to re-install the NVidia
+drivers on a Fedora laptop. It should be fairly up to date, because as I wrote,
+I keep running into this problem over and over again.
+
+The prerequisite is to have the [RPM Fusion][] repositories enabled.
+
+{{< figure src="discover-settings-rpm-fusion.png" >}}
+
+## Installing the NVidia drivers
+
+I found out that I basically only need two packages:
+
+- `nvidia-settings` and 
+- `xorg-x11-drv-nvidia-cuda`
+  
+The first one suffices to pull in the actual drivers and other packages as
+dependencies. The latter is required in order for Darktable to make use of OpenCL.
+
+```fish
+sudo dnf install nvidia-settings xorg-x11-drv-nvidia-cuda
+```
+
+```plain
+Updating and loading repositories:
+Repositories loaded.
+Package                                                                         Arch             Version                                                                          Repository                                           Size
+Installing:
+ nvidia-settings                                                                x86_64           3:570.86.16-1.fc41                                                               rpmfusion-nonfree-updates                         4.4 MiB
+Installing dependencies:
+ akmod-nvidia                                                                   x86_64           3:570.86.16-3.fc41                                                               rpmfusion-nonfree-updates                        92.4 KiB
+ egl-gbm                                                                        x86_64           2:1.1.2^20240919gitb24587d-3.fc41                                                fedora                                           29.3 KiB
+ egl-wayland                                                                    x86_64           1.1.18~20250114git26ba0e3-2.fc41                                                 updates                                          80.9 KiB
+ egl-x11                                                                        x86_64           1.0.1~20241213git61e70b0-1.fc41                                                  updates                                         161.1 KiB
+ nvidia-modprobe                                                                x86_64           3:570.86.16-1.fc41                                                               rpmfusion-nonfree-updates                        51.0 KiB
+ xorg-x11-drv-nvidia                                                            x86_64           3:570.86.16-5.fc41                                                               rpmfusion-nonfree-updates                       190.2 MiB
+ xorg-x11-drv-nvidia-kmodsrc                                                    x86_64           3:570.86.16-5.fc41                                                               rpmfusion-nonfree-updates                        75.4 MiB
+ xorg-x11-drv-nvidia-libs                                                       x86_64           3:570.86.16-5.fc41                                                               rpmfusion-nonfree-updates                       361.9 MiB
+Installing weak dependencies:
+ xorg-x11-drv-nvidia-cuda-libs                                                  x86_64           3:570.86.16-5.fc41                                                               rpmfusion-nonfree-updates                       273.2 MiB
+ xorg-x11-drv-nvidia-power                                                      x86_64           3:570.86.16-5.fc41                                                               rpmfusion-nonfree-updates                       233.7 KiB
+
+Transaction Summary:
+ Installing:        11 packages
+
+Total size of inbound packages is 351 MiB. Need to download 114 KiB.
+After this operation, 906 MiB extra will be used (install 906 MiB, remove 0 B).
+Is this ok [y/N]:
+```
+
+## Testing the installation
+
+```fish
+inxi -G
+```
+
+This will output the following if everything is configured correctly.
+
+```plain
+Graphics:
+  Device-1: Intel Meteor Lake-P [Intel Arc Graphics] driver: i915 v: kernel
+  Device-2: NVIDIA AD107GLM [RTX 500 Ada Generation Laptop GPU]
+    driver: nvidia v: 570.86.16
+  Device-3: Syntek Integrated Camera driver: uvcvideo type: USB
+  Display: wayland server: Xwayland v: 24.1.6 compositor: kwin_wayland
+    driver: gpu: i915 resolution: 1: 3840x2160~60Hz 2: 3072x1920
+  API: EGL v: 1.5 drivers: iris,nvidia
+    platforms: gbm,wayland,x11,surfaceless,device
+  API: OpenGL v: 4.6.0 compat-v: 4.6 vendor: intel mesa v: 25.0.0
+    renderer: Mesa Intel Arc Graphics (MTL)
+  API: Vulkan v: 1.4.304 drivers: N/A surfaces: xcb,xlib,wayland
+  Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
+    de: kscreen-console,kscreen-doctor gpu: nvidia-settings,nvidia-smi
+    wl: wayland-info x11: xdriinfo, xdpyinfo, xprop, xrandr```
+```
+
+If the drivers aren't installed and loaded properly, the graphics card's name
+will be some generic term, not the exact name of the model.
+
+To test if Darktable can use the CUDA driver, start if from the commandline
+like so:
+
+```fish
+darktable -d opencl
+```
+
+This should output a lot of technical information about the graphics card.
+
+If it doesn't, but instead complains along the lines of
+
+> FINALLY: opencl is NOT AVAILABLE on this system
+
+then there is something wrong.
+
+---
+
+## Addendum 2025-04-17
+
+Yesterday I upgraded from Fedora 41 to Fedora 42 (KDE), and of course the NVIDIA
+drivers were removed. Using the instructions above effortlessly installed the
+driver (currently version 570). :-)
+
+[Darktable]: https://www.darktable.org
+[RPM fusion]: https://rpmfusion.org

content/posts/2025/schwanheimer-wiese/index.md

@@ -0,0 +1,36 @@
+---
+title: "Schwanheimer Wiese"
+description: Two images from Schwanheimer Wiese, Frankfurt, Germany
+date: 2025-03-04T06:21:18Z
+draft: false
+# ShowLastmod: true
+toc: false
+scrolltotop: true
+images: []
+tags:
+  - photos
+  - landscape
+  - pentax
+---
+
+I have decided to publish some of my photos on my blog.
+
+Here are the first two of them, both taken on
+["Schwanheimer Wiese"][wiese] a meadow in the forests
+of [Frankfurt-Schwanheim][Schwanheim].
+
+{{< figure src="20250223_152944 IMGP9786.jpg" >}}
+
+The "Struwwelpeter" is a tree named after a figure from
+a famous [children's book][struwwelpeter]:
+
+{{< figure src="20250223_153306 IMGP9790.jpg" >}}
+
+Camera: Pentax K-3 APS-C, 18-55 mm kit lens (crop factor 1.5),
+image developed in [Darktable][]. Raw image file available
+upon reasonable request. All rights reserved.
+
+[darktable]: https://darktable.org
+[Schwanheim]: https://en.wikipedia.org/wiki/Schwanheim_(Frankfurt_am_Main)
+[struwwelpeter]: https://en.wikipedia.org/wiki/Struwwelpeter
+[wiese]: https://de.wikipedia.org/wiki/Frankfurt-Schwanheim#Schwanheimer_Wiese

content/posts/2025/soleier/index.md

@@ -0,0 +1,116 @@
+---
+title: "Soleier: Pickled eggs for Easter"
+description: >
+  Pickled eggs – "Soleier" – are a favorite Easter tradition in my
+  family. Here's my personal recipe.
+date: 2025-04-17T17:55:07+02:00
+draft: false
+# ShowLastmod: true
+toc: false
+scrolltotop: true
+images: []
+tags:
+  - recipes
+---
+
+My family has a long-running tradition of producing pickled eggs for Easter
+breakfast. We call these "Soleier" which is a composite of "Sole" (brine) and
+"Eier" (eggs). Varous theories exist how pickled eggs came into existence, and
+there are various ways to relish these eggs. As for the theories, the reader is
+kindly referred to the [Wikipedia article][pickled eggs]
+(also [in German][Soleier]).
+
+As for the recipe and the way we eat pickled eggs in my family: read on.
+
+{{< figure src="20250414_203010.jpg"
+           alt="My 2025 Soleier preparation."
+           caption="My 2025 Soleier preparation. Smartphone raw image file edited with darktable."
+>}}
+
+## How many eggs?
+
+How many eggs you want to prepare depends on the number of people who want to
+eat the pickled eggs, the number of days you want to have them for breakfast (or
+any other meal to your liking) and last, but not least, what size of jar you
+have to prepare them in.
+
+My 1.5 L [Weck jar][] holds 13 medium-sized eggs.
+
+Typically an adult will have 2 of those eggs for breakfast. With 13 eggs, this
+leaves one spare egg (and toast), but there's usually a kid or two who doesn't
+eat these eggs in pairs (if at all).
+
+{{< figure src="20250414_203911.jpg"
+           alt="Pickled eggs with cracks."
+           caption="I love my pickled eggs to have cracks so that they let some of the brine in."
+>}}
+
+## Recipe
+
+### Ingredients and materials
+
+This recipe is for 13 eggs and a 1.5 L jar.
+
+- 13 eggs
+- 0.75 L water
+- 50 g salt
+- 1-2 tablespoons of caraway seeds (if you like)
+- 1.5 L [Weck jar][] (doesn't need to be original Weck brand, of course, but must be sealed tight)
+- 13 slices of toast
+- butter
+- oil, e.g. rapeseed oil, to your liking
+- vinegar, e.g. any herb-flavored variant, to your liking
+
+### Directions
+
+You should prepare the pickled eggs a few days before you want to eat them. In
+my family we typically do this 7 days before Easter, i.e. on Palm Sunday.
+
+1. Boil the eggs so they get hard. I usually place the eggs in a pot, cover them
+   with water, and then slowly heat the water until it boils. Let it boil until
+   10 minutes have passed since the eggs were placed on the stove. Your mileage
+   may vary depending on your stove.
+2. Pour out the hot water and shock the eggs with cold tap water.
+3. Place the eggs into the jar using a clean spoon (not your hands!). I usually
+   let them drop into the jar so they get nice little cracks, this makes for
+   beautiful texture inside the eggs (see image).
+4. Add the salt and caraway seeds to the jar.
+5. Bring the water to boiling and pour it over the eggs in the jar.
+6. Close the jar.
+7. Invert the jar a couple of times (you may want to wear gloves while doing
+   this, the jar is hot!).
+8. Store the jar in a cool place -- in our house, this is usually the basement.
+
+## How to eat Soleier
+
+There seem to be two fundamentally different ways to eat a _Solei_.
+
+### Our way of eating Soleier
+
+My family's tradition is to peel two eggs, place them on a dish, cut them into
+pieces, then pour some oil and vinegar over the pieces and mash the eggs with a
+fork. This leaves an ugly mess on the plate and I will update this post with a
+picture of this year's appearance.
+
+Brown two slices of toast, spread butter on them, and eat the _Solei_ mash/mess
+using a fork while intermittently taking a bite from the bread.
+
+### The more sophisticated way to eat Soleier
+
+There is an alternative way to have your pickled eggs that supposedly is less
+messy. The [German Wikipedia article][Soleier] claims it's the 'proper' or let's
+say usual way to eat these eggs. I tried it once and I was totally unhappy with
+the experience, so I stick with our traditional way.
+
+Peel two eggs, cut the eggs into halves, remove the egg yolk and mash the egg
+yolk with oil and vinegar. Transfer the mashed egg yolk back into the eggs. I
+will look slightly less ugly, but I promise you will have a hard time getting
+all the egg yolk--oil--vinegar mixture back into the eggs, the plate will look
+like someone's been having _Soleier_ the traditional way, and when trying to put
+the egg halves into your mouth, be prepared for everyone else who sits at the
+table with you bursting into spontaneous laughter. At least that's what happened
+to me one time... ;-)
+
+[pickled eggs]: https://en.wikipedia.org/wiki/Pickled_egg
+[Soleier]: https://de.wikipedia.org/wiki/Solei
+[Weck jar]: https://en.wikipedia.org/wiki/Weck_jar

docker-compose.yml

@@ -1,15 +1,17 @@
 services:
   build:
-    image: hugomods/hugo:latest
+    image: hugomods/hugo:ci
     command: hugo 
     volumes:
       - ".:/src"
     user: 1000:1000
   server:
-    image: hugomods/hugo:latest
+    image: hugomods/hugo:ci
     command: server --buildDrafts --buildFuture
     volumes:
       - ".:/src"
     ports:
       - "127.0.0.1:1313:1313"
     user: 1000:1000
+    environment:
+      - TZ=Europe/Berlin

layouts/shortcodes/git-info.html

@@ -0,0 +1,12 @@
+<p>
+  {{ partial "svg.html" (dict "context" . "name" "posts_single_date") }} {{ dateFormat .Site.Params.dateformNumTime .Page.Date.Local }}
+  {{ if and (not (eq .Page.Params.ShowLastmod nil)) (.Page.Params.ShowLastmod) }}
+  {{ if and .GitInfo .Site.Params.gitUrl }}
+      [{{ partial "svg.html" (dict "context" . "name" "posts_single_git_commit") }}<a href="{{ .Site.Params.gitUrl -}}{{ .Page.GitInfo.Hash }}" target="_blank" rel="noopener">{{ .Page.GitInfo.AbbreviatedHash -}}</a> @ {{ dateFormat .Site.Params.dateformNum .Page.GitInfo.AuthorDate.Local }}]
+  {{ else if not (eq .Page.Lastmod .Page.Date ) }}
+      &nbsp;[{{.Site.Params.initialPublish | default "Initial Published on : "}} {{ dateFormat .Site.Params.dateformNumTime .Page.Lastmod.Local }}]
+  {{ else }}
+      {{ errorf "Lastmod is not found in Page Frontmatter or Lastmod is same as Date" }}
+  {{ end }}
+  {{ end }}
+</p>