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Screenshots/Screencasts: 10 GNU/Linux Distros (Screenshots) and New Screencast/Video of Endeavour OS 2019.08.17

Filed under
GNU
Linux
  • 10 Linux distros: From different to dangerous

    One of the great benefits of Linux is the ability to roll your own. Throughout the years, individuals, organizations, and even nation states have done just that. In this gallery, we're going to showcase some of those distros. Be careful, though. You may not want to load these, or if you do, put them in isolated VMs. We're not kidding when we say they could be dangerous.

  • Endeavour OS 2019.08.17 Run Through

    In this video, we are looking at Endeavour OS 2019.08.17.

Google brings Linux app support to some older Chromebooks (including Chromebook Pixel 2015)

Filed under
Linux
Google

Chrome OS started out as a browser-based operating system that could run web apps only. Eventually Google added support for Android apps, and then for Linux apps, making Chromebooks more useful as general-purpose laptops.

But while most new Chromebooks feature out-of-the-box support for Android and Linux apps, many older models do not… and it looked like they never would.

It turns out that may not be true after all: 9to5Google reports that Google seems to be testing an update that would bring Linux app support to the 2015 Chromebook Pixel, along with a number of other models released that year.

Read more

Devices With Linux

Filed under
Linux
Hardware

Linux Candy: WallGen – image generator tool

Filed under
GNU
Linux
Software

Who loves eye candy? Don’t be shy — you can raise both hands!!

Linux Candy is a new series of articles covering interesting eye candy software. We’re only going to feature open-source software in this series.

I’m not going to harp on about the tired proverb “All work and no play makes Jack a dull boy”. But there’s a certain element of truth here. If you spend all day coding neural networks, mastering a new programming language, sit in meetings feeling bored witless, you’ll need some relief at the end of the day. And what better way by making your desktop environment a bit more memorable.

Let’s start our candy adventure with WallGen. It’s a small command-line utility that generates HQ poly wallpapers with only a few text arguments for inputs. Depending on these arguments, you can create shape-based patterns, randomly filled surfaces, and even image-based patterns.

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An introduction to bpftrace for Linux

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Linux

Bpftrace is a new open source tracer for Linux for analyzing production performance problems and troubleshooting software. Its users and contributors include Netflix, Facebook, Red Hat, Shopify, and others, and it was created by Alastair Robertson, a talented UK-based developer who has won various coding competitions.

Linux already has many performance tools, but they are often counter-based and have limited visibility. For example, iostat(1) or a monitoring agent may tell you your average disk latency, but not the distribution of this latency. Distributions can reveal multiple modes or outliers, either of which may be the real cause of your performance problems. Bpftrace is suited for this kind of analysis: decomposing metrics into distributions or per-event logs and creating new metrics for visibility into blind spots.

Read more

Review: AcademiX GNU/Linux 2.2

Filed under
GNU
Linux
Reviews

What sets AcademiX apart from other distributions is the EDU software manager. This package manager provides curated lists of educational software, which are grouped by subject and by age range. This package manager makes finding educational software really easy. There is software for astronomy, biology, geography, foreign languages, and many other subjects. While there are gaps in the availability of applications covering various subjects, that is a gap in the broader open source application ecosystem, not something specific to AcademiX. While some of the rough edges I noted with the installation process and the desktop customization make me a hesitant to recommend AcademiX to new Linux users, Educational Technology professionals should perhaps try out AcademiX just to use the EDU package manager to explore various open source applications.

While installing and updating software was easy and basically the same experience as any other modern, Debian-based distribution, the fact that some of the packages come from servers in Romania means that some package downloads can be much slower than downloading from the world-wide network of Debian mirrors. For individual packages and small collections of packages this is not too noticeable, but it is still an issue. The frustrating part is the fact that the speeds are not consistent. Sometimes I was downloading at only 40kbps, but other times it was much faster. I experienced the same issue when trying to download the ISO. One download took about 20 minutes for the 1.7GB image but some other attempts took 4 hours.

Final thoughts

AcademiX GNU/Linux is an interesting distribution, but it has some rough edges that need to be cleaned up. Honestly, I really, really wanted to like this distribution (good distributions aimed at the educational market are always needed), but found it to be merely okay. AcademiX has a lot of potential, but it is just not there yet. DebianEdu/Skolelinux is far more polished while serving almost the exact same niche. However, if the AcademiX team cleans up some of the issues I noted above, especially the installer issues, I think future versions of AcademiX might turn out to be worthwhile. The EDU software installer is well organized and aids in discovering educational software, so that is one solid advantage AcademiX offers, but overall the distribution needs more work and polish before I could move it from "this distribution is okay" to "you should give this distribution a try".

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Linux 5.3-rc5

Filed under
Linux

Another week, another -rc.

It's been calm, and nothing here stands out, except perhaps some of
the VM noise where we un-reverted some changes wrt node-local vs
hugepage allocations.

The rest is the usual driver fixes (usb, sound, nvme, habanalabs,
rdma..) some arch updates (arm64 and x86) along with some filesystem
fixes (afs and btrfs).

But all of it is really quite small.

Read more

Also: Linux 5.3-rc5 Released Following A Calm Week

The ClockworkPi GameShell is a super fun DIY spin on portable gaming

Filed under
GNU
Linux
Gaming
Gadgets

Portable consoles are hardly new, and thanks to the Switch, they’re basically the most popular gaming devices in the world. But ClockworkPi’s GameShell is something totally unique, and entirely refreshing when it comes to gaming on the go. This clever DIY console kit provides everything you need to assemble your own pocket gaming machine at home, running Linux-based open-source software and using an open-source hardware design that welcomes future customization.

The GameShell is the result of a successful Kickstarter campaign, which began shipping to its backers last year and is now available to buy either direct from the company or from Amazon. The $159.99 ( on sale for $139.99 as of this writing) includes everything you need to build the console, like the ClockworkPi quad-core Cortex A7 motherboard with integrated Wi-Fi, Bluetooth and 1GB of DDR3 RAM — but it comes unassembled.

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Linux 5.3 Kernel Yielding The Best Performance Yet For AMD EPYC "Rome" CPU Performance

Filed under
Graphics/Benchmarks
Linux

Among many different Linux/open-source benchmarks being worked on for the AMD EPYC "Rome" processors now that our initial launch benchmarks are out of the way are Linux distribution comparisons, checking out the BSD compatibility, and more. Some tests I wrapped up this weekend were seeing how recent Linux kernel releases perform on the AMD EPYC 7742 64-core / 128-thread processors.

For some weekend analysis, here are benchmarks of Linux 4.18 through Linux 5.3 in its current development form. All tests were done on the same AMD EPYC 7742 2P server running Ubuntu 19.04 and using the latest kernels in each series via the Ubuntu Mainline Kernel PPA.

Read more

Neptune 6.0 Released, Which is based on Debian 10 (Buster)

Filed under
GNU
Linux
Debian

Leszek has pleased to announce the release of the new stable release of Neptune 6.0 on 1th Aug, 2019.

It’s first stable release of Neptune 6.0 based on Debian 10 “Buster”, featuring the KDE Plasma desktop with the typical Neptune tweaks and configurations.

The base of the system is Linux Kernel in version 4.19.37 which provides the necessary hardware support.

Plasma 5.14.5 features the stable and flexible KDE made desktop that is loved by millions.

Read more

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More in Tux Machines

Programming: WebAssembly, Mozilla GFX, Qt and Python

  • WebAssembly for speed and code reuse

    Imagine translating a non-web application, written in a high-level language, into a binary module ready for the web. This translation could be done without any change whatsoever to the non-web application's source code. A browser can download the newly translated module efficiently and execute the module in the sandbox. The executing web module can interact seamlessly with other web technologies—with JavaScript (JS) in particular. Welcome to WebAssembly. As befits a language with assembly in the name, WebAssembly is low-level. But this low-level character encourages optimization: the just-in-time (JIT) compiler of the browser's virtual machine can translate portable WebAssembly code into fast, platform-specific machine code. A WebAssembly module thereby becomes an executable suited for compute-bound tasks such as number crunching. Which high-level languages compile into WebAssembly? The list is growing, but the original candidates were C, C++, and Rust. Let's call these three the systems languages, as they are meant for systems programming and high-performance applications programming. The systems languages share two features that suit them for compilation into WebAssembly. The next section gets into the details, which sets up full code examples (in C and TypeScript) together with samples from WebAssembly's own text format language.

  • Mozilla GFX: moz://gfx newsletter #47

    Hi there! Time for another mozilla graphics newsletter. In the comments section of the previous newsletter, Michael asked about the relation between WebRender and WebGL, I’ll try give a short answer here. Both WebRender and WebGL need access to the GPU to do their work. At the moment both of them use the OpenGL API, either directly or through ANGLE which emulates OpenGL on top of D3D11. They, however, each work with their own OpenGL context. Frames produced with WebGL are sent to WebRender as texture handles. WebRender, at the API level, has a single entry point for images, video frames, canvases, in short for every grid of pixels in some flavor of RGB format, be them CPU-side buffers or already in GPU memory as is normally the case for WebGL. In order to share textures between separate OpenGL contexts we rely on platform-specific APIs such as EGLImage and DXGI. Beyond that there isn’t any fancy interaction between WebGL and WebRender. The latter sees the former as a image producer just like 2D canvases, video decoders and plain static images.

  • The Titler Revamp: QML Producer in the making

    At the beginning of this month, I started testing out the new producer as I had a good, rough structure for the producer code, and was only facing a few minor problems. Initially, I was unclear about how exactly the producer is going to be used by the titler so I took a small step back and spent some time figuring out how kdenlivetitle worked, which is the producer in use. Initially, I faced integration problems (which are the ones you’d normally expect) when I tried to make use of the QmlRenderer library for rendering and loading QML templates – and most of them were resolved by a simple refactoring of the QmlRenderer library source code. To give an example, the producer traditionally stores the QML template in global variables which is taken as a character pointer argument (which is, again, traditional C) The QmlRenderer lib takes a QUrl as its parameters for loading the Qml file, so to solve this problem all I had to do was to overload the loadQml() method with one which could accommodate the producer’s needs – which worked perfectly fine. As a consequence, I also had to compartmentalise (further) the rendering process so now we have 3 methods which go sequentially when we want to render something using the library ( initialiseRenderParams( ) -> prepareRenderer( ) -> renderQml( ) ) [...] The problem was resolved (thank you JB) finally and it was not due to OpenGL but it was simply because I hadn’t created an QApplication for the producer (which is necessary for qt producers). The whole month’s been a steep curve, definitely not easy, but, I enjoyed it! Right now, I have a producer which is, now, almost complete and with a little more tweaking, will be put to use, hopefully. I’m still facing a few minor issues which I hope to resolve soon and get a working producer. Once we get that, I can start work on the Kdenlive side. Let’s hope for the best!

  • How to Make a Discord Bot in Python

    In a world where video games are so important to so many people, communication and community around games are vital. Discord offers both of those and more in one well-designed package. In this tutorial, you’ll learn how to make a Discord bot in Python so that you can make the most of this fantastic platform.

  • Qt Visual Studio Tools 2.4 RC Released

    The Visual Studio Project System is widely used as the build system of choice for C++ projects in VS. Under the hood, MSBuild provides the project file format and build framework. The Qt VS Tools make use of the extensibility of MSBuild to provide design-time and build-time integration of Qt in VS projects — toward the end of the post we have a closer look at how that integration works and what changed in the new release. Up to this point, the Qt VS Tools extension managed its own project settings in an isolated manner. This approach prevented the integration of Qt in Visual Studio to fully benefit from the features of VS projects and MSBuild. Significantly, it was not possible to have Qt settings vary according to the build configuration (e.g. having a different list of selected Qt modules for different configurations), including Qt itself: only one version/build of Qt could be selected and would apply to all configurations, a significant drawback in the case of multi-platform projects. Another important limitation that users of the Qt VS Tools have reported is the lack of support for importing Qt-related settings from shared property sheet files. This feature allows settings in VS projects to be shared within a team or organization, thus providing a single source for that information. Up to now, this was not possible to do with settings managed by the Qt VS Tools.

Screenshots/Screencasts: 10 GNU/Linux Distros (Screenshots) and New Screencast/Video of Endeavour OS 2019.08.17

  • 10 Linux distros: From different to dangerous

    One of the great benefits of Linux is the ability to roll your own. Throughout the years, individuals, organizations, and even nation states have done just that. In this gallery, we're going to showcase some of those distros. Be careful, though. You may not want to load these, or if you do, put them in isolated VMs. We're not kidding when we say they could be dangerous.

  • Endeavour OS 2019.08.17 Run Through

    In this video, we are looking at Endeavour OS 2019.08.17.

A Cycle of Renewal, Broken: How Big Tech and Big Media Abuse Copyright Law to Slay Competition

In 1950, a television salesman named Robert Tarlton put together a consortium of TV merchants in the town of Lansford, Pennsylvania to erect an antenna tall enough to pull down signals from Philadelphia, about 90 miles to the southeast. The antenna connected to a web of cables that the consortium strung up and down the streets of Lansford, bringing big-city TV to their customers — and making TV ownership for Lansfordites far more attractive. Though hobbyists had been jury-rigging their own "community antenna television" networks since 1948, no one had ever tried to go into business with such an operation. The first commercial cable TV company was born. The rise of cable over the following years kicked off decades of political controversy over whether the cable operators should be allowed to stay in business, seeing as they were retransmitting broadcast signals without payment or permission and collecting money for the service. Broadcasters took a dim view of people using their signals without permission, which is a little rich, given that the broadcasting industry itself owed its existence to the ability to play sound recordings over the air without permission or payment. The FCC brokered a series of compromises in the years that followed, coming up with complex rules governing which signals a cable operator could retransmit, which ones they must retransmit, and how much all this would cost. The end result was a second way to get TV, one that made peace with—and grew alongside—broadcasters, eventually coming to dominate how we get cable TV in our homes. By 1976, cable and broadcasters joined forces to fight a new technology: home video recorders, starting with Sony's Betamax recorders. In the eyes of the cable operators, broadcasters, and movie studios, these were as illegitimate as the playing of records over the air had been, or as retransmitting those broadcasts over cable had been. Lawsuits over the VCR continued for the next eight years. In 1984, the Supreme Court finally weighed in, legalizing the VCR, and finding that new technologies were not illegal under copyright law if they were "capable of substantial noninfringing uses." Read more

Software, HowTos and Storage

  • Pause Music When Locking The Screen And Resume On Unlock For Spotify, Rhythmbox, Others

    When you lock your computer screen (without suspending the system), most desktop audio players continue playback in the background, sometimes not emitting any sound ¹. Due to this you may unintentionally skip parts of podcasts or songs in a playlist, etc. Enter pause-on-lock, a Bash script that pauses your music player when you lock the screen and resumes playback once the screen is unlocked. pause-on-lock works on Unity, GNOME, Cinnamon and MATE desktop environments, and by default it supports Spotify and Rhythmbox. With the help of playerctl (a command line controller for controlling media players that support the MPRIS D-Bus interface), this script can extend its supported music players to many others, including Audacious, VLC, Cmus, and others.

  • Easy Way to Screen Mirroring Android on Ubuntu!

    Screen Mirroring is one of the features found on smartphones, one of which is on Android. This feature serves to display the smartphone to a computer. This is very useful for example when used for demo applications that you make, or maybe for other things related to smartphones. In Ubuntu, we can do screen mirroring with applications available on Android, for example is AirDroid which can be used for screen mirroring through a browser. But I feel less optimal when using this instant method. Because there is a lag between activity on the smartphone and on the monitor screen on the computer, and the results are less than optimal. What might be the cause because it is opened through a browser and uses wi-fi? (Personal question). I am looking for another application for screen mirroring on Ubuntu, and one of the very good applications is Scrcpy. This application can be used for screen mirroring without a root device.

  • Command line quick tips: Searching with grep
  • How to Install Cezerin on Debian 9
  • How to Create a Bootable USB Stick from the Ubuntu Terminal
  • How to Install Git on Debian 10
  • How to Copy/Move a Docker Container to Another Host
  • Six practical use cases for Nmap
  • The Next Stage of Flash Storage: Computational Storage
  • NAS upgrade

    At some point in the future I hope to spend a little bit of time on the software side of things, as some of the features of my set up are no longer working as they should: I can't remote-decrypt the main disk via SSH on boot, and the first run of any backup fails due to some kind of race condition in the systemd unit dependencies. (The first attempt does not correctly mount the backup partition; the second attempt always succeeds).

  • Storage Concepts And Technologies Explained In Detail