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Programming: GCC, Git and More

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  • AMD Ryzen Threadripper Compiler Tuning/Optimization Benchmarks With GCC 9, PGO

    For those interested in compiler optimization/tuning with AMD Ryzen Threadripper hardware, here are some follow-up benchmarks to Tuesday's GCC 9 vs. Clang 8 C/C++ Compiler Performance On AMD Threadripper, Intel Core i9. 

    The tests today are of GCC 9 at different tuning/optimization levels for reference purposes. Additionally there is a run when using Profile Guided Optimizations (PGO) for looking at the performance impact on GCC 9.

  • Inbox Zero

    Glyph has already written at length about how a full Inbox is a sign of misprioritized tasks. Saying "no" is one example (in other words, prioritizing away). But when saying "yes", it is a good idea to know when it can be done, when should you give up, and potentially apologize, and when should you give a heads-up that it is being delayed.

    [...]

    I read e-mail "when I get around to it". Usually several times a day. I do have notifications enabled on my phone, so I can easily see if the e-mail is urgent.

  • Signing Git Commits

    Often when people talk about GPG, they focus on encryption—GPG's ability to protect a file or message so that only someone who has the appropriate private key can read it. Yet, one of the most important functions GPG offers is signing. Where encryption protects a file or message so that only the intended recipient can decrypt and read it, GPG signing proves that the message was sent by the sender (whomever has control over the private key used to sign) and has not been altered in any way from what the sender wrote.

    Without GPG signing, you could receive encrypted email that only you could open, but you wouldn't be able to prove that it was from the sender. But, GPG signing has applications far beyond email. If you use a modern Linux distribution, it uses GPG signatures on all of its packages, so you can be sure that any software you install from the distribution hasn't been altered to add malicious code after it was packaged. Some distributions even GPG-sign their ISO install files as a stronger form of MD5sum or SHA256sum to verify not only that the large ISO downloaded correctly (MD5 or SHA256 can do that), but also that the particular ISO you are downloading from some random mirror is the same ISO that the distribution created. A mirror could change the file and generate new MD5sums, and you may not notice, but it couldn't generate valid GPG signatures, as that would require access to the distribution's signing key.

  • Control Anything with Alexa Using Node.JS
  • Random number with a normal distribution between 1 and X
  • Modular Perl in Red Hat Enterprise Linux 8
  • How to Check if String contains Substring in Java
  • Python for NLP: Working with the Gensim Library (Part 2)
  • Inheritance versus composition

    The idea of "inheritance" is something that most students learn about early on when they are studying object-oriented programming (OOP). But one of the seminal books about OOP recommends favoring "composition" over inheritance. Ariel Ortiz came to PyCon in Cleveland, Ohio to describe the composition pattern and to explain the tradeoffs between using it and inheritance.

    Ortiz is a full-time faculty member at Tecnológico de Monterrey, which is a private university in Mexico. He noted that the title of his talk, "The Perils of Inheritance", sounded like "clickbait"; he jokingly suggested that perhaps he should have named it: "4 dangers of inheritance; you won't believe number 3!". That elicited a good laugh, but he said that clickbait was not his intent.

    He has been teaching computer science for more than 30 years, using many languages, including Python. He likes Python and uses it for several courses, including data structures, web development, and compiler construction. He started with Python 2.0 in 2001 or so.

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.