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Matthias Schmidt

@xhr@infosec.exchange

OpenBSD user ● DragonFly BSD committer (retired) ● InfoSec and CCC for > 25y ● C3FOC ● Pronouns: he/him

finger m@f.xosc.org for more information

Posts are deleted after 2 years!

981 Followers

193 Following

15 Posts

Joined August 01, 2025

Website:

https://xosc.org

Code:

https://github.com/thexhr

$HOME:

Karlsruhe, DE, EU

Previous account:

https://cybervillains.com/@_xhr_

Posts

Matthias Schmidt @xhr@infosec.exchange · Jul 29, 2026

Replying to @treibholz@mastodon.online

@treibholz@mastodon.online I've seen a lot in 30y of Unix usage, but a 27k LOC shell script is new to me. Reminds me of the good old QBASIC times where the whole code was also in a single file.

Matthias Schmidt @xhr@infosec.exchange · Jul 25, 2026

Replying to @claudiom@bsd.network

@claudiom@bsd.network I am jealous. Europe is suffering from a heat wave with little rain for the last 2 month

Matthias Schmidt @xhr@infosec.exchange · Jul 24, 2026

Replying to @jae@mastodon.bsd.cafe

@jae@mastodon.bsd.cafe they are. I would really like to have a x1 nano but they're hard to get

Matthias Schmidt @xhr@infosec.exchange · Jul 23, 2026

Replying to @jae@mastodon.bsd.cafe

@jae@mastodon.bsd.cafe x250, t450s and x1 carbon Gen 9

Matthias Schmidt @xhr@infosec.exchange · Jul 17, 2026

Replying to @claudiom@bsd.network

@claudiom@bsd.network Some years with A and you already become a German 😀

Matthias Schmidt @xhr@infosec.exchange · Jul 16, 2026

Replying to @stsp@bsd.network

@stsp@bsd.network Congratulations Stefan!

Matthias Schmidt @xhr@infosec.exchange · May 11, 2026

Another fun day with #netcup :

"In order to ensure the continued stability of your system, it was urgently necessary to move your server XXXXXX to another host
system.

We have done this to protect your data and to ensure the regular operation of your server. The migration has just been completed with the
restart of your server.

We generally recommend removing snapshots if they are not needed. In general, this allows us to move your server live, so that no restart is
necessary. In exceptional cases, however, it may be necessary for us to perform a reboot nevertheless, then we will of course inform you
beforehand, as in this case.

Usually we also try to inform you about such a migration process with a necessary reboot in advance. Unfortunately, this was not possible in
the current case due to the urgency.

Thank you for your understanding."

Usually you get this advertisements if someone had fun on the machine with a guest-to-host exploit.

Any recommendations for a VPS hosting provider where I can run #OpenBSD? I already have two VMs at @OpenBSDAms@mastodon.bsd.cafe , so another one would be good :)

Matthias Schmidt @xhr@infosec.exchange · Apr 17, 2026

Replying to @libreleah@mas.to

@libreleah very nice. You plan to submit this to the official ports tree? I would love to give a package a try

Matthias Schmidt @xhr@infosec.exchange · Apr 06, 2026

Replying to @libreleah@mas.to

@libreleah@mas.to awesome work, thanks

Matthias Schmidt @xhr@infosec.exchange · Jan 31, 2026

I wrote a small article on how to backup Unix servers using tar and age. Nothing fancy, just the script and concept I use for all my servers. https://xosc.org/backup-server.html #openbsd #freebsd #netbsd #linux

Matthias Schmidt @xhr@infosec.exchange · Dec 29, 2025

Still no #39c3 merch? Check our remaining stuff at https://c3foc.net We also have merch from previous events. Boosts appreciated!

We close tonight, so get it while it's still hot 🔥

Matthias Schmidt @xhr@infosec.exchange · Dec 19, 2025

Replying to @Doomed_Daniel@mastodon.gamedev.place

@Doomed_Daniel@mastodon.gamedev.place exactly this!

Matthias Schmidt @xhr@infosec.exchange · Aug 03, 2025

Replying to @nblr@chaos.social

@nblr@chaos.social Jep, Unix tools. Auch nach Jahrzehnten immer noch fuer eine Ueberraschung gut :)

Matthias Schmidt @xhr@infosec.exchange · Aug 03, 2025

Replying to @buddhawilliams@eigenmagic.net

@buddhawilliams@eigenmagic.net You're welcome :)

Matthias Schmidt @xhr@infosec.exchange · Aug 01, 2025

Wow, after 25 years of #Unix / #linux experience, I learned that you can filter output in #less.

Press ampersand (&) and enter a regex to show only lines matching the regex.

Press ampersand (&) and then exclamation mark (!) to apply an inverse filter.

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Matthias Schmidt

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