Zhang Yongle is Associate Professor at the Beijing University School of Law, and a rising member of China’s New Left. He shares many of the views of Jiang Shigong 强世功 (b. 1969), his better-known colleague at the same law school.[2] The text translated here, written in 2008, has nothing to do with Zhang’s academic work, but instead reflects changing attitudes among younger Chinese intellectuals concerning the value of Western ideas and the experience of studying abroad.

This repository contains a step-by-step guide that teaches how to create a simple operating system (OS) kernel from scratch. I call this OS Raspberry Pi OS or just RPi OS. The RPi OS source code is largely based on Linux kernel, but the OS has very limited functionality and supports only Raspberry PI 3.

Each lesson is designed in such a way that it first explains how some kernel feature is implemented in the RPi OS, and then it tries to demonstrate how the same functionality works in the Linux kernel. Each lesson has a corresponding folder in the src directory, which contains a snapshot of the OS source code at the time when the lesson had just been completed. This allows the introduction of new concepts gracefully and helps readers to follow the evolution of the RPi OS. Understanding this guide doesn’t require any specific OS development skills.

For more information about project goals and history, please read the Introduction. The project is still under active development, if you are willing to participate - please read the Contribution guide.

The biggest transition for me when I started college was learning to get organized. There was a point when I couldn't just remember everything in my head. And having to constantly keep track of things was distracting me from whatever task I was doing at the moment.

So I tried various forms of todo lists, task trackers, and productivity apps. They were all discouraging because the things to do kept getting longer, and there were too many interrelated things like past meeting notes, calendar appointments, idea lists, and lab notebooks, which were all on different systems.

I gave up and started just tracking in a single text file and have been using it as my main productivity system for 12 years now. It is so essential to my work now, and has surprisingly scaled with a growing set of responsibilities, that I wanted to share this system. It's been my secret weapon.

Success largely boils down to a simple distinction. It’s glaringly obvious once you see it, but also easy to find ingenious ways of ignoring it: do the real thing and stop doing fake alternatives.