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Links to my recent presentations and talks.

My computer history

Details on the most interesting pieces of hardware I got into my hands so far. #retro
Slides

Which BSD full fills my desktop requirements?

Held at AsiaBSDcon 2023 in Tokyo
slides

School, education in corona time

How could school and education be moved to the web? Talks/help sessions done for a Japanese school, and the resulting material.
pdf 1, pdf 2

Similarities between former East Germany and Japan

Some serious and some not so serious parallels between both countries
Presented in 2021 to colleagues
Slides English, Japanese

Bit rot: would you notice if your harddisk lied to you?

10min talk at KichijojiKaigi #18

What is 'bit rot'?
Let's verify if our filesystems would warn you if bit rot occurs (it does not)
Let's use dm-integrity and verify that it helps us to detect bit rot
Ideas and approaches to correct bit rot, future.
slides

Linux monitoring sensors (lmsensors)

Talk at PCP conference 2019 in Melbourne.

Findings from my first foray into PCP - updating the lmsensors metrics (PMDA) code.
The motivation for making these changes were discussed. I covered the various implementation stages, documentation, aids for new developers and ideas for further improvement.
Slides

Things about East Germany and Christian Horn

At a local association in a part of Tokyo/八王子 (Hachiouji). The association is educating locals with English, and helping foreigners in their life at Japan. My speech was in English.

Self introduction
Introducing my hometown
East Germany, and the German reunification.
Slides as pdf

VDO, the transparent deduplication/compression layer

Presented at Tokyo Linux users group in July 2018:

VDO slides, video recording
I presented also about Linux@Nintendo switch, docs, video recording

i18n on Linux by example: Japanese

Internationalization/Localization on Linux, taking Japanese as example. Looking into the details I am hitting with Japanese on Linux.

What are i18n and l10n? What is it good for?
How to read files with “exotic” contents
What are character encodings, what are the most important ones?
Unicode output on Linux
Converting encodings
Input of Russian or Japanese characters
Locales: influencing behavior of programs
i18n for webpages and email, i18n in BIOS/console/UEFI
Slides as pdf, LaTeX sources

A Sysadmins guide to Authentication and Authorization

Audience: Sysadmins, People interested in Authentication/Authorization
contents:
- workings of kerberos/ldap/directories
- historical view over software providing these services
- interaction of unix/windows-worlds, crossrealm auth
first time presented: May 2009
Slides as pdf, LaTeX sources

What's up at the virtualization/emulation front?

Audience: Sysadmins, People interested in virtualization
contents:
- workings/basic technology of virtualization and emulation
- historical view over software providing these services
- summary of causes for virtualization
first time presented: January 2010
also presented at Easterhegg 2010 in Munich, link to recording link to the slides LaTeX sources

Using cobbler in a not so small environment

Audience: Sysadmins, People interested in deployments
contents: explaining basic operation and terms of cobbler, why cobbler was chosen + alternatives, details on companies cobbler setup and the surrounding infrastructure
first time presented: June 2010 @OpenSource Datacenter Conference in Nuremberg
Slides as pdf, LaTeX sources