Romain Pellerin

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I am a Software Engineer living in Paris, France. I usually spend my time programming or having fun in a terminal. In love with GNU/Linux and FOSS (RMS's website is a gold mine everyone should read). I like writing in LaTeX. And I also play the guitar.

Apart from computers, I am also interested in space exploration and rockets, AI and self-driving electric cars. I look forward to a future with a lot less pollution.

I try to read books as often as possible, in English and French. I am also a huge fan of comics.

I write blog posts quite extensively on this website, not only about computer science but also broader topics such as the environment, my travels or politics. There are RSS and Atom feeds that you can subscribe to. I usually write a few times a month. Feedback is greatly appreciated.

Download my resume (PDF).



Social media

You won't find me on Facebook.


Latest articles

  1. Things To Do In Paris

    Le Louvres Tour Eiffel - go to the third floor Champs Elysees Notre Dame Cathedral + towers Arc de Triomphe - go to the top! Montmartre - artistic elevated neighborhood Restaurant Indianafé Café Maine - nice restaurant, great decoration, with English speaking clients and staff - Ground...

  2. How To Find Differences Between Two Directories On Linux

    diff Compares filenames and lines. Very slow. /usr/bin/diff -qr /dirA /dirB comm + find Only compares filenames. Fast. comm -3 <(find /dirA -type f -printf "%f\n"|sort) <(find /dirB -type f -printf "%f\n"|sort)>> Also works with diff. diff + find + md5sum Compares filenames and content. Slow. /usr/bin/diff <(find /dirA -type f -printf "%f "...

  3. Germany

    Recently, I got to spend a few days in Düsseldorf and Cologne. Here is my take on these two cities and Germany. Generally speaking, Germany can be slightly more expensive than France, excepted for food. Supermakets are really affordable. Same goes for restaurants. However, note that tipping is still a thing in Germany, as opposed to France...

Highlighted articles


I operate by Crocker's Rules. You can contact me on any of the above-mentioned websites, or using the following email address:

Should you decide to reach out on social media, please don't say just hi and don't ask to ask :).