Linux Fu: Easy Kernel Debugging

It used to be that building the Linux kernel was not easy. Testing and debugging were even worse. Nowadays, it is reasonably easy to build a custom kernel and test or debug it using virtualization.…

The Linux Scheduler And How It Handles More Cores

Sometimes you read an article headline and you find yourself re-reading it a few times before diving into the article. This was definitely the case for a recent blog post by [The HFT Guy], where th…

Reliving The Authentic 90s Linux Experience

Installing Linux on a modern PC has never been easier. There are tons of tools available that will nearly-automatically download your Linux distribution of choice, image a USB drive, and make it bo…

Linux Fu: Customizing Printf

When it comes to programming in C and, sometimes, C++, the printf function is a jack-of-all-trades. It does a nice job of quickly writing output, but it can also do surprisingly intricate formattin…

Linux Fu: Deep Git Rebasing

If you spend much time helping people with word processor programs, you’ll find that many people don’t really use much of the product. They type, change fonts, save, and print. But cros…

Because You Can: Linux On An Arduino Uno

There are a few “Will it run” tropes when it comes to microcontrollers, one for example is “Will it run Doom?”, while another is “Will it run Linux?”. In one of …

Tiny Linux On A No-MMU RISC-V Microcontroller

In the vast majority of cases, running a Linux-based operating system involves a pretty powerful processor with a lot of memory on hand, and perhaps most importantly, a memory management unit, or M…

Explore Linux Space Time

If you’ve ever wondered how much memory a process uses, you’ve probably used a form of task manager or system monitor. System monitors can be useful to identify resource hogs, but are o…

Find That Obscure Function With This Interactive Map Of The Linux Kernel

Linux has become one of the largest operating systems on the servers that run large websites, and hopefully, one day, it will be big in the desktop market too. Some of you may know how Linux as an …

Linux Fu: Build A Better Ls

Ask someone to name all the things they can find in a room. Only a few will mention air. Ask a Linux command line user about programs they use and they may well forget to mention ls. Like air, it i…

WiFi, PWM Backlight, And Graphics On Updated Chumby Kernel

For some, the Chumby was a peek at what could have been. That vision never died for [Doug Brown], and he has been working tirelessly on bringing mainline Linux kernel support to the customizable sm…

Linux On A Commodore 64

We are used to seeing Linux running on almost everything, but we were a bit taken aback to see [semu-c64] running Linux on a Commodore 64. But between the checked-out user name and the caveat that:…

Linux Fu: The Old School Terminal

Maybe you have a vintage old-school computer. Maybe you have a replica. Maybe you just want to run SIMH and relive the glory days of CP/M or VMS. The problem is, it looks kind of silly to have CP/M…

Looking Back On 30 Years Of Debian

The early history of Linux is a rather murky period to most, long before the era of glitzy marketing and proclamations of ‘the Linux desktop’ being the next hot thing. This was also the…

Linux, Running On Not A Lot

There are many possible answers to the question of what the lowest-powered hardware on which Linux could run might be, but it’s usually a pre-requisite for a Linux-capable platform to have a …

Transforming A Keyboard To A Mouse In Software

You’ve probably heard the old saying that if it looks like a duck, and it quacks like a duck… So when is a keyboard a mouse? When software makes it quack like a mouse — that is, i…

Linux Kernel From First Principles

What to learn the internals of the Linux kernel? Version 6.5-rc5 has about 36 million lines of code in it, so good luck! [Seiya] has a different approach. Go back to the beginning and examine the 0…

Linux Containers The Hard Way

If you want to make containers under Linux, plenty of high-level options exist. [Lucavallin] wanted to learn more about how containers really work, so he decided to tackle the problem using the low…

Debian Officially Adds RISC-V Support

As time goes on, more and more computer manufacturers are moving towards the ARM architecture and away from the bloated and outdated x86 instruction set. Apple is the most prominent producer to tak…