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#sysadmin

33 posts33 participants10 posts today

This morning, something happened that brought me immense pleasure. A long-standing client called and asked if they could "bother" me. I replied that they weren't bothering me at all, and that I was "testing some new things". They immediately said, "Oh, I'll call you another time then".
Of course, they had my full and undivided attention from that moment on.

One of the challenging aspects of my work method is making people (not necessarily clients, but generally) understand that experimentation is more important than deployment itself. When they see me set up a server in a very short time (and it will stay up for years), it's not (just) because I use effective tools, but also because it's backed by research, errors, and successes. In a word: experience.

Sitting in front of my computer with two old APUs, therefore, isn't a pastime but one of the most critical parts of my testing. Dated and underperforming hardware necessitates optimization. When people grasp this, it's a true joy for me.

Now, if you'll excuse me, I need to go check how a signal penetrates concrete walls with three different access points placed in the same spot...

...And the fact that I enjoy all of this immensely is just an added bonus! 😆

Behind every seamless deployment and stable server is a #SysAdmin who made it happen 😎 Today, we’re shining a spotlight on the IT pros who quietly — but brilliantly keep everything running smoothly & honor the critical work done by sysadmins around the globe.
To celebrate, we’re giving you something actually useful: the @adminmagazine “10 Terrific Tools for the Busy Admin – 2025 Edition”
Download it now for free & give your toolkit a serious upgrade!
🔗 htznr.li/sysadminday

Ich habe übrigens immer noch die Domain sysadmin-jobs.de. Eigentlich wollte ich da so eine Jobbörse für Sysadmins bauen, die über Empfehlung von anderen Sysadmins funktioniert, da viele Jobs häufig über Empfehlungen von anderen vermittelt werden.

Wie das so ist: keine Zeit, anderes Zeugs zu tun, etc...
Trotzdem finde ich die Idee eigentlich ganz nett und falls das jemand aufgreifen möchte, gebe ich die Domain gerne ab. Auch wenn jemand eine andere gute Idee für die Verwendung der Domain hat.

#sysadmin#job#jobs

SSL/TLS is one of the things I like dealing with the least in #devops or #sysadmin work. LetsEncrypt is cool and all but I've regularly had issues with automating it.

That's a me problem, I just wish I had a more consistent solution.

💾 ZFS ARC Cache Explained 💾

ZFS uses RAM as a powerful cache called the ARC (Adaptive Replacement Cache) to speed up disk reads and metadata operations.

It looks like ZFS “eats” RAM — but it’s actually putting your memory to work, caching data for blazing-fast access.

⚠️ Important: ARC is not a memory leak!
It dynamically adjusts — if apps need RAM, ARC frees it instantly.

🛠️ You can set a limit with zfs_arc_max so ZFS won’t take all your memory.

✅ Properly tuned, ARC boosts performance without starving your system.

So don’t fear the RAM usage—embrace the cache! 🚀