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Gunnar Wolf - Nice grey life - page 3

Showing posts 21 – 30

Impact of parallelism and processor architecture while building a kernel
Given that Bálint just braggedblogged about how efficiently he can build a Linux kernel (less than 8 seconds, wow! Well, yes, until you read it is the result of aggressive caching and is achieved only for a second run), and that a question just popped up today on the Debian ARM mailing list, «is an ARM computer a good choice? Which one?», I decided to share my results of an experiment I did several months ago, to graphically show to my students the effects of parallelism, the artifacts of hyperthreading, the effects of different architecture sets, and even illustrate about...

Jerusalem online critical cartography for the digital age
While cartography studies the making and using of maps, this book focuses on a specific case study of critical cartography, that is, when power relations and differing understandings of reality and politics change or shape the making of maps for a given location or community. The case of study looked at here is one of the world’s most contested and historical cities: Jerusalem. The author presents the power struggle in Jerusalem, taking a clear stand as a sympathizer of the Palestinian side–a view that shapes the whole book. She starts by explaining how cartography has been used as a means...

We are GREAT at handling multimedia!
I have mentioned several times in this blog, as well as by other communication means, that I am very happy with the laptop I bought (used) about a year and a half ago: an ARM-based Lenovo Yoga C630. Yes, I knew from the very beginning that using this laptop would pose a challenge to me in many ways, as full hardware support for ARM laptops are nowhere as easy as for plain boring x86 systems. But the advantages far outweigh the inconvenience (i.e. the hoops I had to jump through to handle video-out when I started teaching presentially, which are...

miniDebConf Tamil Nadu 2023
Greetings from Viluppuram, Tamil Nadu, South India! As a preparation and warm-up for DebConf in September, the Debian people in India have organized a miniDebConf. Well, I don’t want to be unfair to them — They have been regularly organizing miniDebConfs for over a decade, and while most of the attendees are students local to this state in South India (the very ``tip’’ of the country; Tamil Nadu is the Eastern side, and Kerala, where Kochi is and DebConf will be held, is the Western side), I have talked with attendees from very different regions of this country. This miniDebConf...

Back to Understanding Computers and Cognition
As many of you know, I work at UNAM, Mexico’s largest university. My work is split in two parts: My “full-time” job is to be the systems and network administrator at the Economics Research Institute, and I do some hours of teaching at the Engineering Faculty. At the Institute, my role is academic — but although I have tried to frame my works in a way amenable to analysis grounded on the Social Sciences (Construcción Colaborativa del Conocimiento, Hecho con Creative Commons, Mecanismos de privacidad y anonimato), so far, I have not taken part of academic collaboration with my coworkers...

Phishing and communication channels, a guide to identifying and mitigating phishing attacks
It is not far-fetched to say that most (if not all) CR readers have been subjected to some sort of phishing attack–and even more likely if we consider the wide taxonomy of activities that Sonowal’s book covers. Can we as individuals identify them before falling prey? Can we as systems administrators detect them before our users are delivered potentially harmful content? Can we as application programmers write secure code that thwarts the most common attacks? Are there nontechnical resources that can be applied to combat phishing? And, above all, what is phishing? It is a generic term that can be...

Learn enough developer tools to be dangerous command line, text editor, and Git version control essentials
The command-line interface (CLI) scares many newcomers to the computing field. It is, however, a most powerful way to interact with the computer, allowing the user a command composition richness that cannot be matched via graphical interfaces. As a long-time power user, I have often been asked how one should go about learning to use it–and have often been at a loss answering that question. I learned long ago that I cannot really give pointers, and this is what first got me interested in reading this book. This book should be seen as a collection of three works, not as...

Back to Xochicalco
In Mexico, we have the great luck to live among vestiges of long-gone cultures, some that were conquered and in some way got adapted and survived into our modern, mostly-West-Europan-derived society, and some that thrived but disappeared many more centuries ago. And although not everybody feels the same way, in my family we have always enjoyed visiting archaeological sites — when I was a child and today. Some of the regulars that follow this blog (or its syndicators) will remember Xochicalco, as it was the destination we chose for the daytrip back in the day, in DebConf6 (May 2006). This...

Refueling the blog
So, it’s this weird time of year where we make a balance and share with the world some ideas about the future. And… yes, it’s time to take care of this blog, as its activity has dropped once again. So… maybe it’d be nice to start this post by checking how much have I blogged over the years: 2004: 27 2005: 92 2006: 65 2007: 83 2008: 64 2009: 62 2010: 48 2011: 25 2012: 27 2013: 29 2014: 37 2015: 18 2016: 19 2017: 20 2018: 19 2019: 19 2020: 14 2021: 11 2022: 10 (yes, this is an...

Learning some Rust with Lars!
A couple of weeks ago, I read a blog post by former Debian Developer Lars Wirzenius offering a free basic (6hr) course on the Rust language to interested free software and open source software programmers. I know Lars offers training courses in programming, and besides knowing him for ~20 years and being proud to consider us to be friends, have worked with him in a couple of projects (i.e. he is upstream for vmdb2, which I maintain in Debian and use for generating the Raspberry Pi Debian images) — He is a talented programmer, and a fun guy to be...


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