oftionn blog

Thirty articles. Zero marketing.

Everything we explain in the videos, written down properly — with the commands, the trade-offs and the parts that do not fit into sixty seconds.

Articles

Browse by series.

Showing 30 articles.

🐧 Linux

Who controls your machine?

Windows collects telemetry. Linux is transparent. A side-by-side comparison.

9 min read
🐧 Linux

Linux on an old laptop

A 2012 ThinkPad against Windows 11 — how Linux gives old hardware a second chance.

6 min read
🐧 Linux

What is a kernel?

The Linux kernel runs your hardware — explained without the jargon.

6 min read
🐧 Linux

30 years of open source

Linus Torvalds from 1991 to today — and the moment Linux quietly won.

5 min read
🐧 Linux

Terminal vs GUI — a speed test

Twenty-five seconds of clicking against two seconds of typing — the same task.

5 min read
🐧 Linux

A free server — really?

AWS Free Tier against a Linux VPS for a złoty a month, with the maths written out.

4 min read
🐧 Linux

SSH — passwords and permissions

What changing one SSH password teaches you about securing a whole server.

4 min read
🐧 Linux

Why companies move to Linux

Netflix, Spotify, Google — who already moved, and what they were actually after.

4 min read
🐧 Linux

chmod 755 explained

The rwx letters are not a magic spell. They are your security model.

4 min read
🐧 Linux

MIT vs GPL vs Apache

Three licences, three sets of rules. What you may do with the code, and what you may not.

5 min read
🏠 Self-hosted

Instead of Google Drive

Sync to a NAS you own, with Nextcloud on top. Your cloud, your disk.

4 min read
🏠 Self-hosted

Tracking versus your own server

What Google knows about you, next to what your own NAS knows.

4 min read
🏠 Self-hosted

Jellyfin in three minutes

Docker and docker-compose — four commands and your media library is live.

4 min read
🏠 Self-hosted

NAS vs cloud — the cost conversation

A storage bill every month against a box you buy once. Do the maths.

4 min read
🏠 Self-hosted

Immich without Google Photos

Holiday photos that stay yours, with backup from every phone in the house.

4 min read
🏠 Self-hosted

Where does your data live?

The USA or Warsaw — GDPR, jurisdiction and what data sovereignty actually means.

4 min read
🏠 Self-hosted

Home Assistant on your NAS

A smart home with no subscription: bulbs, thermostats and automations that stay local.

4 min read
🏠 Self-hosted

File syncing across devices

Change it on the desktop, see it on the phone. How syncing actually works.

4 min read
🏠 Self-hosted

Local server, zero lag

One millisecond from the next room against 150 from the other side of the Atlantic.

4 min read
🏠 Self-hosted

The 3-2-1 backup rule

A fire, a local server and one copy somewhere else — disaster recovery in plain terms.

3 min read
🧩 Open source

Is Android open source?

What share of Android is actually open — and who gets to audit it.

4 min read
🧩 Open source

Who is Linus Torvalds and what did he build?

From Linux 1.0 in 1991 to Android today — how one kernel ended up under most of the world's technology.

4 min read
🧩 Open source

How do open source companies make money?

Red Hat, Canonical, Apache — where the money in free software actually comes from.

3 min read
🧩 Open source

Who writes open source, and how?

Thirty countries, one codebase — a map of commits from around the world.

4 min read
🧩 Open source

MIT, GPL, Apache: what they mean for you

Three licences, three philosophies — and how to pick one for your own project.

4 min read
🧩 Open source

Can you hide a backdoor in open source?

Open code can be read end to end. Closed code you simply take on trust.

4 min read
🧩 Open source

Why big tech pays for open source

Google, Microsoft and Amazon pour money into the Linux Foundation. What exactly for?

4 min read
🧩 Open source

LibreOffice or Microsoft Office compared

A free suite against a subscription — what you actually gain, and what you give up.

3 min read
🧩 Open source

Is open code safer than closed?

Closed code against ten thousand pairs of eyes — which one ends up with fewer holes?

4 min read
🧩 Open source

Who maintains open source, and why for free?

Why volunteers build and maintain the infrastructure the world runs on.

4 min read
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