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today's leftovers

Submitted by Roy Schestowitz on Thursday 10th of October 2019 04:29:19 PM Filed under
Misc
  • Collapse OS is a Special Operating System for the Post-Apocalyptic Future

    As reported by Motherboard, there’s a new open-source operating system that is currently under heavy development, and it looks like it will soon be ready for a very dire scenario. Its creator, Virgil Dupras, is a person who believes there’s a good chance that by 2030, the world will have collapsed. The software developer isn’t absolutely certain about this, but he believes that the chances of the scenario are high enough to justify the development of a post-apocalyptic operating system, called “Collapse OS”.

    So, what would the ideal scavenger’s operating system be like? The simple answer to this would be “one that can run on virtually anything”. If there is one system out there that can run on almost any hardware, this is the Debian GNU/Linux distribution. Collapse OS is taking things a lot further, being able to run on microcontrollers such as the ubiquitous Z80 microprocessor. Dupras considered what piece of hardware would be the easiest to find in a post-apocalyptic world, and Z80 came as the definitive answer. This 8-bit microprocessor is in cash registers, computers, music instruments, calculators, and virtually anything electronic.

  • PostgreSQL considers seccomp() filters

    A discussion on the pgsql-hackers mailing list at the end of August is another reminder that the suitability of seccomp() filters is likely more narrow than was hoped. Applying filters to the PostgreSQL database is difficult for a number of reasons and the benefit for the project and its users is not entirely clear. The discussion highlights the tradeoffs inherent in adding system-call filtering to a complex software suite; it may help crystallize the thinking of other projects that are also looking at supporting seccomp() filters.

    Joe Conway raised the idea in an RFC patch posting. It added a way to filter system calls in the main postmaster process and, with a separate system-call list, in the per-session backends. It also showed how to generate the list of system calls that are being used by PostgreSQL under various workloads, such as the test targets in the Makefile or by running a specific application. Information on the system calls made is logged by the audit subsystem; those logs are then processed to produce the list. Once there is confidence that the list is complete—which may be a sticking point—the remaining system calls could be blocked so that executing them would cause an error.

    But Peter Eisentraut was concerned that the list is going to be incomplete due to the "fantastic test coverage" needed to generate it and that it will require constant maintenance to keep up with GNU C Library (glibc) and other changes. Beyond that, PostgreSQL extensions will need their own lists of allowed system calls. Conway seems to see the support as something that those interested will maintain for themselves, rather than having a list that the project will distribute. "Perhaps most people never use this, but when needed (and increasingly will be required) it is available."

  • mjbots quad A0: October 2019 Roadmap

    My last video gave an overview of what I’ve accomplished over the past year. Now, let me talk about what I’m planning to work on going forward:

    I intend to divide my efforts into two parallel tracks. The first is to demonstrate increased capabilities and continue learning with the existing quad A0, and second is to design and manufacture the next revision of all its major components.

  • Philip Chimento: Free software at 40°C

    It’s that time of year again, time for a belated reflection on the GUADEC conference!

    In August I traveled to Thessaloniki, Greece, to attend first the annual GNOME Foundation board handover day, then the advisory board meeting, then the GUADEC conference and associated unconference days.

    The board discussion focused quite a lot on the strategic goals for the GNOME Foundation which you can hear more about in executive director Neil McGovern’s talk. Nuritzi has also blogged about the process of putting together these strategic goals.

»

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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.

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