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Programming Leftovers

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Development
  • Highlights From The 2019 Pandas Hack

    Taking place simultaneously in Austin, Bentonville, and Dallas from August 16–18, the Pandas Hack was a weekend hackathon focused on providing updates and bug fixes to the pandas data science library.

  • Updated high-DPI support for Qt 5.14
    Hi all,
    
    We’ve recently merged several patches which improves Qt’s high-DPI support. The changes include:
    
    * Support for fractional device pixel ratios (e.g. Windows 150%)
    * Support per-screen DPI in more places like QStyle
    * Cleanup of configuration API and options.
    
    These fixes applies mostly to the AA_EnableHighDpiScaling type of high-DPI support where 
    the device independent coordinate system is set up by QtGui. Relevant platforms include Windows,
    X11, and Android. The new code and and config options are cross-platform though; it should be
    possible to develop and test on any platform (as long as you are not working on platform plugins).
    
    
  • Qt 5.14 Is Bringing Significantly Better HiDPI Support

    Besides KDE seeing its own HiDPI improvements like fractional scaling on Wayland recently landing, the Qt5 tool-kit is seeing more HiDPI improvements on its end too.

    With Qt 5.14 that is slated to be released before year's end there will be better HiDPI support for dealing with today's modern high pixel density displays. Some of the Qt 5.14 HiDPI improvements include support for fractional device pixel ratios, supporting per-screen DPIs more throughout the tool-kit, configuration API clean-ups, platform plug-in additions, an API for setting the rounding policy for the scaling factor, and expanding the supported environment variables for testing the functionality.

  • Reactive Foundation tackles next phase of software architecture

    “With the rise of cloud-native computing and modern application development practices, reactive programming addresses challenges with message streams and will be critical to adoption,” said Michael Dolan, VP of strategic programs at the Linux Foundation. “With the Reactive Foundation, the industry now has a neutral home for supporting the open source projects enabling reactive programming.”

    [...]

    RSocket builds on reactive streams to prevent outages and is designed to support microservices-based and cloud-native applications as a high-performance replacement of traditional HTTP. It enables long-lived streams on different transport connections, which is useful for mobile to server communication. The foundation will also seeks to expand the open-source community around RSocket and reactive programming.

    “After more than a decade of innovations, the reactive ecosystem is making it into mainstream adoption with Project Reactor, Spring Boot and the Spring Framework accelerating its adoption,” said Stephane Maldini, project reactor lLead at Pivotal. “Together, we can build hyper efficient, scalable distributed systems by rethinking the way we design them and by using the right protocol to coordinate them.”

More in Tux Machines

Dev kit and module run Linux on Zynq Ultrascale+

Topic Embedded has launched a “Florida Plus” dev kit that runs Linux on its Zynq Ultrascale+ based Miami MPSoC Plus module. Meanwhile, Aries announced it has begun distributing Topic’s Zynq-based Miami modules. Netherlands-based Topic Embedded Systems has been around for 20 years doing FPGA work, with the last decade focused primarily on manufacturing Linux-driven Xilinx Zynq based modules. Last week, Topic announced an open-spec Florida Plus Development Kit that showcases its top-of-the-line Miami MPSoC Plus compute module, which features the Zynq UltraScale+ MPSoC. system-on-chip. Read more

today's howtos

  • How to Install Mosh Shell as SSH Alternative on Linux Desktop

    Using an SSH client tool is always helpful and handy for the system administrator and the remote users. In the conventional SSH clients, you may find some network and auto session logout issues. As a system admin, you already realize the importance of the CLI-based remote SSH client. To solve frequent logout, lagging, and packet loss issues, you can install the Mosh SSH as an SSH alternative on Linux. The Mosh stands for the Mobile shell, which is a command-line-based secure shell client for Linux. It doesn’t require a stale and static IP address to establish the connection; moreover, the Mosh SSH shell client is also compatible with mobile devices.

  • New Linux Publication Released: How Linux Works, 3rd Edition: What Every Superuser Should Know by Brian Ward

    I am very excited about this publication not only because it is a great book covering such a large set of Linux-related topics but also because I helped with the technical review.

  • How to install the NVIDIA drivers on Ubuntu 21.04

    The objective is to install the NVIDIA drivers on Ubuntu 21.04 Hirsute Hippo Linux and switch from a opensource Nouveau driver to the proprietary Nvidia driver. To install Nvidia driver on other Linux distributions, follow our Nvidia Linux Driver guide.

  • How to install Blender 2.92 on Deepin 20.2

    In this video, we are looking at how to install Blender 2.92 on Deepin 20.2.

  • How to install Funkin' High Effort Ugh mod on a Chromebook

    Today we are looking at how to install Funkin' High Effort Ugh mod on a Chromebook. Please follow the video/audio guide as a tutorial where we explain the process step by step and use the commands below. If you have any questions, please contact us via a YouTube comment and we would be happy to assist you!

GNU Project: GCC 11.1 Release Candidate and Cryptographic Algorithms GnuTLS

  • GCC 11.1 Release Candidate available from gcc.gnu.org
    The first release candidate for GCC 11.1 is available from
    
     https://gcc.gnu.org/pub/gcc/snapshots/11.1.0-RC-20210420/
     ftp://gcc.gnu.org/pub/gcc/snapshots/11.1.0-RC-20210420
    
    and shortly its mirrors.  It has been generated from git revision
    r11-8265-g246abba01f302eb453475b650ba839ec905be76d.
    
    I have so far bootstrapped and tested the release candidate on
    x86_64-linux and i686-linux.  Please test it and report any issues to
    bugzilla.
    
    If all goes well, I'd like to release 11.1 on Tuesday, April 27th.
    
  • GCC 11.1 RC Released, GCC 12 In Development On Trunk

    The release candidate to GCC 11.1 as the first stable release of GCC 11 is now available for testing. If all goes well GCC 11.1.0 will officially debut next week while GCC 12 is now in development with their latest Git code. Red Hat's Jakub Jelinek announced the GCC 11.1 release candidate today, which has been bootstrapped and tested so far for i686 and x86_64 Linux. He is hoping to release GCC 11.1 officially next week if all goes well.

  • Daiki Ueno: AF_ALG support in GnuTLS

    The Linux kernel implements a set of cryptographic algorithms to be used by other parts of the kernel. These algorithms can be accessed through the internal API; notable consumers of this API are encrypted network protocols such as IPSec and WireGuard, as well as data encryption as in fscrypt. The kernel also provides an interface for user-space programs to access the kernel crypto API. GnuTLS has recently gained a new crypto backend that uses the kernel interface in addition to the user-space implementation. There are a few benefits of having it. The most obvious one is performance improvement: while the existing user-space assembly implementation has comparable performance to the in-kernel software emulation, the kernel crypto implementation also enables workload offloading to hardware accelerators, such as Intel QAT cards. Secondly, it brings support for a wider variety of CPU architectures: not only IA32 and AArch64, but also PowerPC and s390. The last but not least is that it could be used as a potential safety net for the crypto algorithms implementation: deferring the crypto operations to the kernel means that we could have an option to workaround any bugs or compliance (such as FIPS140) issues in the library.

More JingPad A1 Linux tablet detailed revealed ahead of crowdfunding

The JingPad A1 is a tablet with an 11 inch AMOLED touchscreen display, support for digital pen input, and a detachable keyboard that lets you use the tablet like a laptop. It also has an operating system that’s designed for both tablet and laptop mode. That’s because the JingPad A1 will be the first tablet to ship with JingOS, an operating system developed by Chinese company Jingling that’s a custom Linux distribution designed for tablets but capable of running desktop applications (as well as some Android applications). First unveiled in March, the tablet will go up for pre-order soon through an Indiegogo crowdfunding campaign. Jingling hasn’t announced a price yet, but an Indiegogo preview page is now live, and folks who sign up with an email address may be able to save 40-percent when orders open up in May. Read more