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February 2021

Best Free and Open Source Software – February 2021 Updates

Filed under
OSS

The table above shows articles updated in February 2021.

For our entire collection, check out the categories below. This is the largest compilation of recommended software. The collection includes hundreds of articles, with comprehensive sections on internet, graphics, games, programming, science, office, utilities, and more. Almost all of the software is free and open source.

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IPFS 0.8 Is Released

Filed under
Software

The Interplanetary File System (IPFS) is a system for storing and transfering verifiable, content-addressed data in a peer-to-peer network. You can imagine a combination of a large git tree and huge BitTorrent swarm to get an idea of how it works. That's not what it is, but is very roughly how it works.

One difference between git and IPFS is that the data stored on IPFS is not necessarily persistent. It is possible to make data persist on your own IPFS node by "pinning" it. go-ipfs, the GO implementation of the file system server part of IPFS, supports remote pinning as of version 0.8.0. You can now ask remote services to pin your data for you using a authenticated API but you can't expect random strangers to do that for no reason. There is simply no incentive to pin some random strangers data since IPFS does not have any crypto-currency, or any other payment system, built into it. The new remote pinning feature is therefore mostly useful for remote IPFS servers under your control or the control of someone you've paid or made some deal with.

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How to Verify SHA256 Checksum of File in Linux using sha256sum

Filed under
Linux

The last week I intend to install Red Hat on my System. I was able to download and create a bootable device using the dd command without any hassle.

If you know, Red Hat has options to Test media & Install Red Hat Enterprises, so I have selected those options; while it’s verifying media, it shows the error of The file header checksum does not match computed checksum.

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Open Hardware: Arduino, Raspberry Pi, and RISC-V/ESP32-C3

Filed under
Hardware

  • Arduino Blog » Monitor your hoverboard’s power draw with this Arduino-based meter/logger

    If you look at your car’s dashboard, there’s a good chance you’ll find an efficiency rating for how you’re driving. However, what if you instead ride a hoverboard? This functionality is certainly not stock equipment, yet Niklas Roy wanted to understand the power consumption of his transporter during different riding situations. For that reason, he decided to develop a power monitor that not only graphs his stats when scooting around, but records the data for later viewing and analysis.

    Roy’s handheld device is controlled by an Arduino Nano and utilizes a Hall effect ammeter for current sensing. The measurements are shown as numbers and as oscillograms on a 1.8” TFT screen, which can also be logged to the display’s built-in SD card. An RTC module provides timestamp information for these readings, which can be produced using Processing and overlaid on video.

  • STM32U5 Cortex-M33 MCU gets more performance, 2D graphics accelerator, and advanced security

    The new family has a higher 160 MHz clock speed, up to 2048 KB flash, up to 786 KB RAM, a 2D graphics accelerator, several peripherals have been upgraded, and a new autonomous mode lets DMA and peripherals keep working while most of the device sleeps in order to save power.

    [...]

    The board also comes with 512-Mbit octal-SPI Flash memory, 64-Mbit octal-SPI PSRAM, 256-Kbit I2C EEPROM, as well as ARDUINO Uno V3, STMod+, and Pmod expansion connectors, plus an expansion connector for a camera module, and STLink-V3E embedded debugger.

  • Pi Day at the Raspberry Pi Foundation
  • Hello RISC-V! We got samples of the new ESP32-C3 module and it is only 13×17 mm

    We got some engineering samples of ESP32-C3 modules.

Documentation Improvements in KDE

Filed under
KDE

Doxyqml, our documentation bridge between QML and doxygen, got various improvements, thanks to Olaf Mandel and Lasse Lopperi. Now QML enums are supported and the lexer/parser got various bug fixes.

Speaking of QML documentation, the Kirigami API documentation was improved and now uses more correctly @inherit tags and @property tags. There is still room for improvements, but the current state is already a lot better. Most Components are now showing all their properties correctly and the type of the property is correct. (kirigami!239)

Another improvement is that the generated Kirigami documentation now shows more accurate names: e.g. Kirigami.Page instead of org::kde::kirigami::Page. This makes it easier to read and navigate the documentation.

There was also a bit of background work inside KApiDox, Jannet added support for QDoc, allowing to use QDoc as an alternative to Doxygen. This might be a better solution for generating documentation for projects with a lot of QML.

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Also: MJ Inventory Released

today's howtos

Filed under
HowTos
  • What is Automation and Configuration Management with CHEF – Part 1

    Configuration Management is the key focus point of DevOps practice. In the Software development cycle, all the servers should be software-configured and maintained well in such a way that they should not make any break in the development cycle. Bad configuration Management can make system outages, leaks, and data breaches. Using Configuration Management tools is about facilitating accuracy, efficiency, and speed in the DevOps-driven environment.

    There are two models of configuration Management tools – PUSH-based & PULL-based. In the PUSH-based, the Master server pushes the configuration code to the servers wherein PULL-based individual servers contact the Master for getting configuration code. PUPPET and CHEF are widely used PULL-based models, ANSIBLE is a popular PUSH-based model. In this article, we will see about CHEF.

  • How to Install XWiki on Ubuntu 20.04

    XWiki is a free and open-source Wiki Software platform written in Java. It runs on servlet containers like Tomcat and uses a database such as MySQL to store information.

  • How To Install Zoom on Manjaro 20 - idroot

    In this tutorial, we will show you how to install Zoom on Manjaro 20. For those of you who didn’t know, Zoom is the leader in modern enterprise video communications, with an easy, reliable cloud platform for video and audio conferencing, chat, and webinars across mobile, desktop, and room systems. It is commonly used in education sectors, in workplaces for communication with clients and colleagues, teleconferencing, and even for social relations.

    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 through the step-by-step installation of Zoom on a Manjaro 20 (Nibia).

  • Starting LaTeX on Ubuntu with the User Friendly Gummi

    Academics people and alike tend to love documents written with LaTeX -- one of the best text creation systems you can run on computer. The benefit is, the resulting document is truly beautiful. To start making LaTeX document on Ubuntu, you can start with the user friendly application, Gummi, which features preview. This short tutorial includes examples for basic texting and several math formulas. Now let's learn!

What is GNU/Linux Copypasta?

Filed under
GNU
Linux

I’d just like to interject for a moment. What you’re refering to as Linux, is in fact, GNU/Linux, or as I’ve recently taken to calling it, GNU plus Linux. Linux is not an operating system unto itself, but rather another free component of a fully functioning GNU system made useful by the GNU corelibs, shell utilities and vital system components comprising a full OS as defined by POSIX.

Many computer users run a modified version of the GNU system every day, without realizing it. Through a peculiar turn of events, the version of GNU which is widely used today is often called Linux, and many of its users are not aware that it is basically the GNU system, developed by the GNU Project.

There really is a Linux, and these people are using it, but it is just a part of the system they use. Linux is the kernel: the program in the system that allocates the machine’s resources to the other programs that you run. The kernel is an essential part of an operating system, but useless by itself; it can only function in the context of a complete operating system. Linux is normally used in combination with the GNU operating system: the whole system is basically GNU with Linux added, or GNU/Linux. All the so-called Linux distributions are really distributions of GNU/Linux!

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Ben Widawsky: Framebuffer Modifiers Part 1

Filed under
Development
Graphics/Benchmarks
Linux

In a now pretty well established tradition on my part, I am posting on things I no longer work on!

I gave a talk on modifiers at XDC 2017 and Linux Plumbers 2017 audio only. It was always my goal to have a blog post accompany the work. Relatively shortly after the talks, I ended up leaving graphics and so it dropped on the priority list.

I'm splitting this up into two posts. This post will go over the problem, and solutions. The next post will go over the implementation details.

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Linux Lite 5.4 Will Be Based on Ubuntu 20.04.2 LTS, Release Candidate Ready for Testing

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Ubuntu

Linux Lite is a user-friendly distro that aims to bring more ex-Windows users to the Linux and Open Source ecosystem. The new release of this Ubuntu derived distribution, Linux Lite 5.4, will be based on Canonical’s recently released Ubuntu 20.04.2 LTS (Focal Fossa) operating system.

But Linux Lite 5.4 will ship with the long-term supported Linux 5.4 LTS kernel instead of the much newer Linux kernel 5.8 from Ubuntu 20.04.2 LTS. However, users will be able to install any other kernel they want up to the recently released Linux kernel 5.11 from the software repositories with just two commands.

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Shows/Videos: 0 A.D., VIM, and TLLTS

Filed under
GNU
Linux
  • The Latest Release Of 0 A.D. Looks Amazing!

    0 A.D. is a real-time strategy game that is free and open source. It has been around for a number of years and is one of the best examples of how good an open source game can be. A couple of days ago, they had a huge release. Some of the most notable changes are the incredible graphics. NOTE: This is my second time uploading this video. The first time I uploaded the video, I did not realize that Kdenlive had rendered it in 720p. Bad Kdenlive, bad!

  • Your First Step To Learn Vim

    You've probably noticed that I'm really awful with vim and don't do anything in an efficient way. Part of that is due to me never having finished vim tutor so what better way to do that than do it on stream.

  • How To Use VIM Editor

    This post will show you how to use VIM! Vim is a text editor that edits all kinds of text files. For instance, the text file may be a shell script with a .sh extension or it can be a text file with a .txt extension.

  • The Linux Link Tech Show Episode 895

    monitor, odroid xu4, automation, docker, github actions, 3d printing

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This week in NeoChat

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