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Programming Leftovers

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Development
  • Riddle me this

    Found this today while playing around, thought people might enjoy this riddle.

  • TOP 5 Software Failures of 2018–2019 (#5 is pretty alarming)

    In this modern day and age tech is something we can’t even imagine our life without. Technology is so cool and we love it! But not everything goes as planned and the thing that was supposed to make life easier and be useful can become quite scary. So, this week we’ve wanted to bring your attention to the “TOP 5 Software Failures of 2018–2019 (#5 is pretty alarming)”. We are very interested in your thoughts on the matter!

  • Using Matplotlib with Wing 7

    Wing supports interactive development and debugging of Python code designed for the Matplotlib numerical and scientific plotting library, so plots can be shown and updated from the command line.

  • An unexpected character replacement

    A few weeks ago I found a replacement in GBIF that I'd never seen before: M<fc>ller. It was a hexadecimal value for the character "ü" enclosed in angle brackets. That particular hex value for "ü" appears in Windows-1252 and other encodings, but what program did this replacement? And why?

    Suspecting the worst, I did a search for other angle-bracket-enclosed strings in the dataset. The search turned up a lot of data items which had originally contained a non-breaking space, and which now contained that character's Unicode representation in brackets, for example Laevicardium. Excluding these, the result is shown here:

  • 40 Simple Yet Effective Linux Shell Script Examples

    Historically, the shell has been the native command-line interpreter for Unix-like systems. It has proven to be one of Unix’s major features throughout the years and grew into a whole new topic itself. Linux offers a variety of powerful shells with robust functionality, including Bash, Zsh, Tcsh, and Ksh. One of the most amazing features of these shells is their programmability. Creating simple yet effective Linux shell scripts for tackling day to day jobs is quite easy. Moreover, a modest knowledge over this topic will make you a Linux power user in no time. Stay with us to for a detailed introduction to Unix shell scripting.

  • Creating A Super User In Django

    Django’s prominent feature is the admin interface, which makes it stand out from the competition. It is a built-in app that automatically generates a user interface to add and modify a site’s content.

  • Using PostgreSQL with Django

    Django is a high level full-stack open-source web framework written in Python, that encourages rapid development and clean, pragmatic design.

    Django, in its ‘out-of-the-box’ state, is set up to communicate with SQLite – a lightweight relational database included with the Python distribution. So by default, Django automatically creates an SQLite database for your project.

    In addition to SQLite, Django also has support for other popular databases that include PostgreSQL, MySQL, and Oracle.

  • Creating Comments System With Django

    In this tutorial, we will build a basic commenting system for a Django 2.X app, which lets readers add comments on posts.

    Here is a preview of what we are going to build by the end of this tutorial.

More in Tux Machines

Camus Video Chat: The Open-source Privacy-aware Video Cat Meeting tool that you have been waiting for

Camus is a lightweight cross-platform real-time peer-to-peer video chat application. It's built with Python3 and ready to be deployed on server with simple few steps. We have reviewed and listed several open-source video applications on Medevel.com, but most of them require time and skills to install and use. It's not the case with Camu which is created by a solo developer using several technologies to make it a good alternative for Google Meet, meet.jit.si and of course zoom. In glance, Camus offers similar functionalities to the competing apps like text messaging, customizable video quality, high audio quality and desktop sharing. It's also can be installed easily on any Linux distribution that support Snap or on a web server with Docker. The main reason why do like Camus is its easy install as it takes far more time to install and configure than most of the alternative apps we tested and used before. Read more Also: Empathy first: Driving growth through people leadership

Devices/Embedded: NanoPi, Arduino and More

  • NanoPi R4S SBC launched with optional metal case for $45 and up

    We found NanoPi R4S board in a work-in-progress Wiki last month. The tiny single board computer is designed for headless applications but comes with much better specifications compared to similar boards with a Rockchip RK3399 hexa-core processor with up to 4GB RAM, dual Gigabit Ethernet, and USB 3.0 ports. At the time we had limited information, but FriendlyELEC has now started selling the board for $45 and up, together with an optional metal case for a fanless operation that should ensure very good cooling.

  • Rockchip RK3568 processor to power edge computing and NVR applications

    We recently reported on the Rockchip developer conference (RKDC) 2020, and especially the upcoming Rockchip RK3588 Cortex-A76/A55 processor that packs a lot of power and features, and is now scheduled to launch in Q3 2021. But as you can imagine there were other products revealed during the conference, including the new Rockchip RK3568, similar to the previously announced RK3566, and designed for edge computing and network video recorder (NVR) applications.

  • Tiger Lake module supports industrial models

    Portwell’s “PCOM-B656VGL” Compact Type 6 module runs on 11th Gen Core CPUs including embedded “E” and industrial “GRE” models with up to 64GB DDR4-3200, 4x displays, 4x USB 3.2 Gen2, and 9x PCIe lanes, including 4x Gen4.

  • i.MX8M based SMARC module adds crypto chip and optional TSN

    Adlink’s rugged, Linux-ready “LEC-iMX8M” SMARC module combines a quad -A53 i.MX8M with a crypto chip plus up to 4GB DDR3L, up to 64GB eMMC, and support for HDMI 2.0a with 4K, 2x MIPI-CSI2, and up to 2x GbE with optional TSN. Earlier this month, we reported on Adlink’s SMARC 2.1 form-factor LEC-IMX8MP module with NXP’s AI-enabled i.MX8M Plus. Adlink has also posted a preliminary product page for a SMARC 2.1 module that builds on the standard, similarly quad-core, Cortex-A53 i.MX8M. The rugged LEC-iMX8M module is notable for its additional, AES-128-enabled cryptography chip with hardware key storage for up to 16 keys, certificates, or data.

  • Arduino Blog » Creating a continuum tentacle-like robot with Arduino

    Continuum robots — which look like a tentacle or perhaps an elephant’s trunk — use a series of linkage sections and internal tendons to move both horizontally and vertically. While they may seem quite exotic, in the video below element14 Presents’ DJ Harrigan breaks down how he built one with an Arduino Mega and a fairly simple list of parts.

Oracle/Red Hat/Fedora: Oracle Linux Cloud Native Environment, ABRT, XWayland, Satellite and Ansible

  • Announcing Oracle Linux Cloud Native Environment Release 1.2

    Oracle is pleased to announce the general availability of Oracle Linux Cloud Native Environment Release 1.2. This release includes several enhancements focused on improving the security and compliance of customer environments. Release 1.2 also includes new versions of core components, including Kubernetes, CRI-O, Kata Containers, and Istio. Oracle Linux Cloud Native Environment is an integrated suite of software components for the development and management of cloud-native applications. Based on the Cloud Native Computing Foundation and Open Container Initiative standards, Oracle Linux Cloud Native Environment delivers a simplified framework for installations, updates, upgrades, and configuration of key features for orchestrating microservices.

  • EOL of EL6 and EL7 and removal Customer portal support - ABRT

    For a long time, we talked about EOLing EL6 and EL7. What does it actually mean? RHEL 6 is going to be EOL at the end of this month (30th November 2020). We will no longer build ABRT packages for EL6 and we will stop supporting EL6 as content. RHEL 7 is still active but quite old. ABRT team will stop testing, building, and developing on top of RHEL7. We are going to focus on RHEL 8 and upcoming RHEL and Fedora. We still support RHEL 7 as content (e.g., in ABRT Analytics).

  • Fedora Looks To Provide Standalone XWayland Package Tracking X.Org Server Git - Phoronix

    With the X.Org Server being "abandonware" but at the same time the upstream XWayland portion of the codebase continuing to be worked on, Fedora developers at Red Hat are looking at splitting XWayland into its own standalone package to make it easier to ship it without having to use the rest of the xorg-server code-base. While Red Hat developers previously worked to manage X.Org Server releases, there isn't much upside to that these days and they would rather ship a standalone XWayland package for Fedora users rather than go through the process of new xorg-server releases.

  • Preparing for RHEL Extended Life Cycle Support with Red Hat Satellite and the Ansible Automation Platform

    Red Hat Enterprise Linux (RHEL) 6 was introduced more than 10 years ago, on November 9, 2010. Originally branched from Fedora 12, RHEL 6 has spent the last 10 years faithfully running Linux workloads. After more than a decade of faithful service, RHEL 6’s lifespan is nearly up: on November 30th, RHEL 6 will move out of Maintenance Support 2 and into Extended Life Cycle Support (ELS). Today, we’ll walk through how to prepare our Red Hat Satellite server for the switch of RHEL 6 to ELS, as well as adjusting our currently registered systems. We’ll be doing both of these things via Ansible and the newly introduced redhat.satellite Ansible Collection.

Kernel: IWD, OpenZFS and Mesa

  • Intel IWD 1.10 With DHCP v6 Support - Phoronix

    Version 1.10 of Intel's IWD "iNet Wireless Daemon" has been released as the increasingly useful alternative to the likes of WPA_Supplicant for Linux systems. Intel's open-source wireless daemon for Linux systems continues adding in more features and improvements. While it started out with a focus on minimalism and embedded use-cases, IWD is being evaluated for possible use on Ubuntu among other Linux distributions.

  • Notable Developer Starts Patreon to Fund Apple Silicon Linux Port - MacRumors

    Developer Hector Martin, who describes himself as someone who "likes putting Linux on things," has launched a plan create a Linux port for Apple Silicon Macs.

  • OpenZFS 2.0 Released With Unified FreeBSD/Linux Support, Many New Features - Phoronix

    OpenZFS 2.0 has been officially released! OpenZFS 2.0 marks a major step forward for open-source ZFS file-system support for what started out as ZFSOnLinux but is now OpenZFS with unified FreeBSD and Linux support (macOS support is still being pursued as well) and this release also bringing many new features.

  • [Mesa-dev] [ANNOUNCE] mesa 20.3.0-rc3
    Hi list,
    
    Mesa 20.3-rc3 is now available for general consumption. This is a few
    days late thanks to the US Thanksgiving holiday. I think we're
    pretty close to having .0 this week, just one issue left on the tracker.
    
    Dylan
    
  • Mesa 20.3 Is Near With Lavapipe Vulkan, Raspberry Pi V3DV, Better AMD RDNA2 Support - Phoronix

    The weekly release candidates of Mesa 20.3 fell off the wagon last week due to the US Thanksgiving holiday but now is updated today for Mesa 20.3-RC3. Mesa 20.3-RC3 is out and things are looking good for the stable release potentially in a week or two. There remains just one blocker bug left before Mesa 20.3.0 could be cleared for release.