Devoxx 2022

Back on the big stage!

I’m back on the big stage! I haven’t attend any big conferences as presenter for some time, but this year will change it. I’m starting big, with a talk: Docker base images - Ideas how to manage them on scale  external link on Devoxx  external link conference in Kraków, that will take place on 22-24th June 2022. Want to meet? Meet there 😄 Update I uploaded slides from presentation to my Github account  external link ....

2022-06-13 · 1 min · timor
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On slow decline of streaming services

I was so happy when Netflix became available in my country. I was waiting for any serious streaming provider, that will give me easy and legal access to the movies I love. Ok, looks like not to all of them were there, but future was looking bright. As time was passing, offer was extending. They eventually added even some Polish movies, which my wife appreciated. Seems like my country is not in the same league like USA, Germany or UK....

2022-01-10 · 5 min · timor
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Creating fully encrypted ZFS pool

What I want to do? I use my pool to securely store backups, archive my old documents and keep huge family’s photo library. I have new disks. They were tortured with badblocks , so they’re ready to create ZFS pool. I’ve read few documents about different approaches 1 2 3. I wanted to be sure if anything changed during past years. One of articles recommends mirroring over RAIDZ. Resilvering is faster, at the same time putting IO less stress on whole pool....

2021-11-22 · 5 min · timor

Shucking WD Elements 14TB

I used to have RAID (or at least some variation of it) for my main storage. For redundancy, in case of disk failure. I started with some crazy LVM mirrors done on two disks of different size. Sync job was starting on every boot 😄 Then came time for RAID5 on mdadm + LVM for volume management. It was working nice until the moment when disks became bigger. Long array rebuilds or checks, required my PC to stay turned on overnight just to validate if stuff works still....

2021-11-12 · 8 min · timor
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Automatically add ticket ID to every commit message in Git

I don’t know how it is in your company, but in mine it’s considered a good practice to add ticket numbers to commit messages. It allows to easily determine why something was changed, etc. Makes sense, but this also means, that I should be adding this ticket to every message… And this doesn’t make sense for me. I will accidentally avoid it from time to time or make a lot of typos....

2021-11-09 · 2 min · timor

Resize images from command line on MacOS

I was updating my blog and needed to generate few variants of images, in different resolution. Option 1 - sips There’s simple, builtin tool sips, that can be used for simple resizing 1: Resize single image sips -Z 36 orig.png --out static/favicon36x36.png -Z - maintain image aspect ratio 36 - maximum height and width It can be also used for batch image processing: Warning Beware, without –out param, it will overwrite images in place!...

2021-11-07 · 2 min · timor

Homebrew - uninstall formula with dependencies

I use brew extensively on MacOS. It’s just as convenient as many Linux package managers. What I don’t like, it leaves dependencies after removal of formula. There’s simple way to clean it up by running one command 1. Uninstall with dependencies brew uninstall FORMULA brew autoremove Info In my case running brew autoremove actually removed few packages I really wanted to have. Check the output carefully!  external link  ↩︎

2021-11-05 · 1 min · timor


I’ve build new PC - it’s based on Asus ROG STRIX Z590-E GAMING WIFI  external link motherboard. Generally, I’m quite satisfied, but it have one irritating downside - after each UEFI BIOS upgrade, it’s silently resetting some of settings. Let me note, what I want to have there: Ai Tweaker (use my RAM capabilities) AI Overcloack Tuner -> [XMP I] DRAM Frequency -> [DDR4-3600MHz] DRAM CAS# Latency -> [16] DRAM RAS# to CAS# Delay -> [19] DRAM RAS# ACT Time -> [39] DRAM Voltage -> [1....

2021-10-30 · 2 min · timor

Official CentOS 8 Stream Docker image finally available!

Finally, they’re available! Wait a moment.. Actually they’re available for few months, just nobody published information about moving them to  external link and dropped poor guys using  external link without any updates! Yes, that how they did! I found new place accidentally, reading some news about CentOS Stream 9 on their blog  external link . There was reference to CentOS 9 Stream dev builds of Docker images and I found “missing” stream and stream8 tags too....

2021-07-25 · 2 min · timor

How to remove geo-localization/EXIF data from photos

I wanted to share publicly some photos, but I performed them with navigation enabled so they contained accurate localization of my house. I wanted to remove EXIF data GPS tags, my phone type and other irrelevant stuff. Tip There’s a way that requires less effort. Check how to automate this process with pre-commit hooks  external link . TL;DR You will need imagemagick installed (use apt/yum/dnf of whatever you have there):...

2021-03-05 · 1 min · timor