Why Linux is the final OS choice in the AI era

People often tell me they use a Mac because the terminal is comfortable there. Every time I hear it I think the opposite. If the terminal is your reason, the answer is Linux, and more so. On a Mac the terminal is a window onto something Unix-like. On Linux the terminal is the system. What your hands can reach is not the same.

That gap widened once AI started writing the code. Most of my work now happens inside a terminal: ask Claude, check the result, correct it, ask again. In that loop the operating system has exactly one job. Get out of the way.

Small, fast, and fine on old hardware

My automation runs on a Mac mini from 2011. Sixteen gigabytes of memory. A fifteen-year-old machine.

Coding through Claude on it gives me no trouble at all. It stays on all day while a scheduler publishes posts, backups run, and several jobs sit side by side. If you told me to run that machine on anything other than Linux I would not have an answer for you. Modern operating systems spend more on drawing the screen than I spend on the work I am actually doing.

A machine I thought I should throw away now does the job of a full second computer. It is not that I chose not to buy new hardware. A reason to buy it never came up.

Linux really was awkward, once

I am not going to pretend away the years I put this off.

Korean input used to break constantly. Move a window and the input method would not follow; in some programs Korean simply would not go in. Fonts were the other half of it. Open a web page and Korean came out as boxes, or came out in something ugly. It sounds minor. On a screen you stare at all day, minor things like that stop work.

So for a long stretch I went back and forth between Windows and macOS like everyone else.

That is ninety-nine percent gone

None of it is on my screen now. Korean input just works. There are no fonts I have to go and install. I call that ninety-nine percent solved. The remaining one percent turns up in some unusual program now and then, and it is not a reason to change operating systems.

If you have not tried Linux in a few years, the thing you remember as the problem has most likely already been fixed.

The last wall was the certificate

The real reason people in Korea could not move was never the desktop. It was banks and government sites. The joint certificate, the thing we used to call the public certificate, is why I kept one Windows machine alive.

I solved it with a virtual machine. Windows lives inside Linux, and I go in there only for that one errand. No more shutting down and booting into another operating system.

That single fix changed the arithmetic. I now do all of my work in Linux, one hundred percent of it. Even banking does not take me out of it.

So which Linux

Here I do have one answer. Lubuntu.

Ubuntu and Lubuntu share the same roots. What differs is the part that draws the screen. Ubuntu uses the heavy, ornamental one; Lubuntu uses the light one. That difference shows up directly in how fast the machine feels.

The same box running Ubuntu and running Lubuntu feels like two different computers. How fast a window opens, how fast a menu appears, how fast the file manager opens a folder. These never show up cleanly in benchmarks and you meet them a few hundred times a day.

Old hardware that feels like a new computer. That one sentence is why I run Lubuntu.

What it comes to

The more of my time goes to directing an AI, the less I need an impressive screen and the more I need a floor that does not trip me. A place where the terminal is the system itself, where a fifteen-year-old machine still pulls its weight, and where Korean and the bank no longer get in the way.

Before you buy a new computer, pull out the old one you shoved under the desk. Put Lubuntu on it. The reason to buy will probably disappear.