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Internet Radio with Raspberry Pi

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Linux

Less fascinating than the old radio technology by “internet radio” we are able to send “radio” communication far beyond the range of “wireless” radio. In the current and in following articles, we would like to approach the topic of radio and audio broadcasting on TCP/IP network and its integration with radio repeaters, in order to build something like “hybrid” radio links. The example proposed in the article is based on Raspberry Pi that is, by now, the preferred platform for our tutorials on GNU/Linux embedded world. In this first issue we are depicting how to build a portable internet “radio”, it is a device suitable for receiving and managing radio and audio streaming carried by an internet connection, both wired and wireless. We will also cover the management of audio track playlists stored on USB keys or on network shared disk drives. Streaming trasmission requires sending a flows of TCP/HTTP packets containing bunches of digitazed audio from production and distribution servers to clients scattered all over internet networks, where the streaming itself will be turned again into audible sounds.

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Linux 3.16 Shows Some Slower Numbers On Intel Devil's Canyon

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Linux

Yesterday I published some performance benchmarks indicating Intel ultrabook performance might be a bit slower on Linux 3.16 when comparing a recent Git kernel against Linux 3.15 stable. Today I have some results from a very different system: numbers on the very high-end Intel Core i7 4790K "Devil's Canyon" desktop rig.

With doing the comparison again of Linux 3.15 stable against Linux 3.16 Git, in a number of tests the performance was measurably slower with the newer code still under development. In a majority of the tests the performance was about the same, but in none of the cases was there any significant performance gains for this system.

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uCLinux SBC for IoT runs WiFi and Bluetooth at 400mW

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Linux

Amptek is prepping a uClinux- and Cortex-M3 based “iCon” SBC for IoT, equipped with WiFi, Bluetooth 4.0, USB, and CAN, and running on under half a Watt.

uClinux on a microcontroller represents the simplest expression of the Linux operating system, sort of the flipside to Android or Ubuntu on the high end. Despite this platform’s limitations, however, it draws only a smidgin of electricity, and provides a capable wireless platform while also supplying numerous industrial interfaces. All these attributes are showcased by the iCon single board computer (SBC), which probably deserves more than being stuck in the doldrums on Kickstarter, with nine days left to go.

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Alpine Linux 3.0.1 Is a Linux OS for People Who Love the Terminal

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OS
Linux

Alpine Linux is not a distribution designed for beginners. In fact, it’s exactly the opposite. Users will need to be well accustomed to use a terminal. For example, you have to work a little just to install a desktop environment.

“The Alpine Linux project is pleased to announce the immediate availability of version 3.0.1 of its Alpine Linux operating system. This is a bugfix release of the v3.0 musl based branch. This release is based on the 3.14.8 kernel which has some critical security fixes,” said the developers in the shortlog.

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Raspberry Pi NOOBS 1.3.8: Get it, try it, and have fun

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Development
Linux

OpenELEC has been updated to 4.0.5 in this NOOBS release. In addition to the XBMC update (which is undoubtedly the most important change), there are lots of security fixes and general bugfixes — some of which were specific to the Raspberry Pi version, so this is particularly good news for RPi users. It also includes support for some more WLAN chips, updated Raspberry Pi firmware, and it even updates the Linux kernel to 3.14.7, which is even newer than what is included in the Raspbian distribution. Good stuff.

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MIT scientists create 36-core chip speed demon

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GNU
Linux
Server

Right now the only operating system that supports this 36 core processors, are the ones based on Linux, though it is not certain which Linux based OS MIT researchers are using.

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What's Next For Fedora?

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GNU
Linux
Red Hat
Interviews

Between the upcoming Fedora 21 release, involvement in Red Hat's Project Atomic, its planned re-structuring under Fedora.next, and its new leader, Matthew Miller, the Fedora Project has a lot going on lately. All of the upheaval is a sign that the distribution is doing what it must to stay relevant in the new world of distributed, scale-out computing, says Miller who took over as project leader earlier this month after his predecessor Robyn Bergeron announced her departure in May.

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Why Raspberry Pi is still the white knight of education

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Development
Linux
Interviews

Two years ago, when the Raspberry Pi launched, it was with the intention of improving IT education in the UK. Since then more powerful, better connected or cheaper boards have come onto the market, but the Pi retains its position as the white knight of ICT teaching.

Why? Because of the community of users that has grown up around it. To find out more we travelled west to Manchester, venue for the second annual Jamboree—a festival of educators, makers and messer-abouters focussed on highlighting how engaging the Pi can be. There, we met 75% of the Raspberry Pi Foundation’s education team—Ben Nuttall, Clive Beale, and Carrie Anne Philbin—to discuss IT teaching in the UK.

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Parsix GNU/Linux 6.0r1 Is an Interesting Debian and GNOME 3.10 Mix

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GNU
Linux
Debian

Parsix GNU/Linux 6.0r1, a live and installation DVD based on Debian, aiming to provide a ready-to-use, easy-to-install desktop and laptop-optimized operating system, has been released for testing.

The developers' ultimate goal is to offer customers an easy-to-use OS based on Debian's Wheezy branch, which employs a release of the GNOME desktop environment. The devs have made a few minor modifications to the desktop and now it's much easier to set it apart from other distros.

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The big takeaway from Google I/O: Linux everywhere

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Linux
Google

I was wondering what was ‘L’ in Android, until someone pointed out “maybe it’s Linux”. In all honestly I don’t think it’s L for Linux, but a wishful thinking doesn’t hurt given the fact that Google is putting Linux ‘everywhere’.

Linus Torvalds may have never dreamt of this day when he sent out that email back in 1991 and said, “I’m doing a (free) operating system (just a hobby, won’t be big and professional like gnu) for 386(486) AT clones.”

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Also:

  • Linux is Everywhere - Supercomputers to Mobile Phones

    Steven J. Vaughan-Nichols, writing for ZDNet, once again reminds us that Linux dominates supercomputers. SJVN linked to the latest Top500 group results, showing Linux makes up for 97% of the five hundred fastest computers in the world. This is the biggest of the big iron, the top supercomputer has 1,024,000 GB of RAM and 3,120,000 Intel Xeon cores, running Kylin Linux.

    With Linux being the clear OS of choice among the hot rod builders, where does proprietary Unix fit into the picture? Increasingly, the answer appears to be that it doesn't.

  • Linux Nears Total Domination of the Top500 Supercomputers

    Not only does Linux power all of the top 10 machines on the June 2014 list -- including China's winning Tianhe-2, which stole the show once again with its performance of 33.86 Petaflop/second (Pflop/s) on the Linpack benchmark -- but it also now accounts for a full 97 percent of the full set of 500. A mere 15 supercomputers on the list *don't* use Linux, including 12 using Unix and just two using Windows. (The last one is described simply as "Mixed.")

  • Google I/O Offers Devs Big Bonanza

    Google on Wednesday kicked off its I/O conference in San Francisco, presenting devs with a dizzying array of possibilities: a new design language for Android L; a boatload of new apps, APIs and SDKs; and expanded support for a variety of architectural and hardware configurations. "If I were a developer, I would feel real good about opportunities today," said ABI analyst Jeff Orr.

  • Google debuts Android L (5.0), plus wearable, auto, TV versions

    At Google I/O, Google previewed Android 5.0′s new UI, and also unveiled Android TV and Android Auto, while offering new details on Android Wear.

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More in Tux Machines

Docker 1.13, Containers, and DevOps

  • Introducing Docker 1.13
    Today we’re releasing Docker 1.13 with lots of new features, improvements and fixes to help Docker users with New Year’s resolutions to build more and better container apps. Docker 1.13 builds on and improves Docker swarm mode introduced in Docker 1.12 and has lots of other fixes. Read on for Docker 1.13 highlights.
  • Docker 1.13 Officially Released, Docker for AWS and Azure Ready for Production
    Docker announced today the general availability of Docker 1.13, the third major update of the open-source application container engine for GNU/Linux, macOS, and Microsoft Windows operating systems. Docker 1.13 has been in development for the past couple of months, during which it received no less than seven RC (Release Candidate) versions that implemented numerous improvements for the new Swarm Mode introduced in Docker 1.12, a few security features, as well as a new Remote API (version 1.25) and Client.
  • Distributed Fabric: A New Architecture for Container-Based Applications
    There’s a palpable sense of excitement in the application development world around container technology. Containers bring a new level of agility and speed to app development, giving developers the ability to break large monolithic apps into small, manageable microservices that can talk to one another, be more easily tested and deployed, and operate more efficiently as a full application. However, containers also demand a new architecture for the application services managing these microservices and apps, particularly in regards to service discovery — locating and consuming the services of those microservices.
  • DevOps trends emerging for 2017 and beyond
    Finally, one of the biggest trends for 2017 will not be just a focus on engaging and implementing some of these DevOps best practices into your enterprise, but a sweeping adoption of the DevOps/agile culture. This is because one of the most important – if not the absolute most key –tenets to a successful DevOps organization is culture. The enterprises that most espouse the shared responsibility, the empowered autonomous teams, the can-do attitudes, and the continuous learning environment in which DevOps thrives will see the biggest benefits.

Kernel Space/Linux

  • Optimizing Linux for Slow Computers
    It’s interesting, to consider what constitutes a power user of an operating system. For most people in the wider world a power user is someone who knows their way around Windows and Microsoft Office a lot, and can help them get their print jobs to come out right. For those of us in our community, and in particular Linux users though it’s a more difficult thing to nail down. If you’re a LibreOffice power user like your Windows counterpart, you’ve only really scratched the surface. Even if you’ve made your Raspberry Pi do all sorts of tricks in Python from the command line, or spent a career shepherding websites onto virtual Linux machines loaded with Apache and MySQL, are you then a power user compared to the person who knows their way around the system at the lower level and has an understanding of the kernel? Probably not. It’s like climbing a mountain with false summits, there are so many layers to power usership. So while some of you readers will be au fait with your OS at its very lowest level, most of us will be somewhere intermediate. We’ll know our way around our OS in terms of the things we do with it, and while those things might be quite advanced we’ll rely on our distribution packager to take care of the vast majority of the hard work.
  • Long-Term Maintenance, or How to (Mis-)Manage Embedded Systems for 10+ Years
    In this presentation, kernel hacker Jan Lübbe will explain why apparently reasonable approaches to long-term maintenance fail and how to establish a sustainable workflow instead.
  • Linux 4.9 Is the Next Long-Term Supported Kernel Branch, Says Greg Kroah-Hartman
    Linux kernel maintainer Greg Kroah-Hartman confirmed today, January 19, 2017, in a short message, on his Google+ page, that the Linux 4.9 branch is now marked as "longterm," or as some of you know as LTS (Long-Term Support). The story behind Linux kernel 4.9 becoming the next long-term supported series dates from way before it's launch last month, on December 11, when Linus Torvalds officially announced the new branch. It all started back on August 12, 2016, when Greg Kroah-Hartman dropped a quick Google+ post to say "4.9 == next LTS kernel."
  • Maintainers Don't Scale
    First let’s look at how the kernel community works, and how a change gets merged into Linus Torvalds’ repository. Changes are submitted as patches to mailing list, then get some review and eventually get applied by a maintainer to that maintainer’s git tree. Each maintainer then sends pull request, often directly to Linus. With a few big subsystems (networking, graphics and ARM-SoC are the major ones) there’s a second or third level of sub-maintainers in. 80% of the patches get merged this way, only 20% are committed by a maintainer directly. Most maintainers are just that, a single person, and often responsible for a bunch of different areas in the kernel with corresponding different git branches and repositories. To my knowledge there are only three subsystems that have embraced group maintainership models of different kinds: TIP (x86 and core kernel), ARM-SoC and the graphics subsystem (DRM).

Graphics in Linux

  • RADV Vulkan Driver Has Geometry Shader Support For Testing
    David Airlie has published a set of 31 patches for testing that provide initial support for geometry shaders within the RADV Radeon Vulkan driver. While RadeonSI has long supported geometry shaders, it's been a bigger work item bringing it to this open-source Radeon Vulkan driver within Mesa. The patches are enough for Vulkan geometry shaders to get working on RADV, but Airlie explains that the support isn't gold: "This is a first pass at geometry shader support on radv, all the code should be here in reviewable pieces, it seems to mostly pass CTS tests but triggers some llvm 3.9 bugs around kill, and there might still be a GPU hang in here, but this should still be a good place to start reviewing."
  • libinput 1.6.0
    This release fixes the slow touchpad acceleration on touchpads with less than 1000dpi, a missing call to normalized the deltas was the source of the issue.
  • Libinput 1.6 Released With New Touchpad Acceleration
    Libinput 1.6.0 was announced a short time ago on wayland-devel.
  • Mesa 17 Gets a First Release Candidate, Final Planned for Early February 2017
    Collabora's Emil Velikov announced today, January 19, 2017, the availability of the first of many Release Candidate (RC) development versions of the upcoming and highly anticipated Mesa 17.0.0 3D Graphics Library. Mesa 17 is shaping up to be a huge milestone that should dramatically improve the performance of the bundled open-source graphics drivers for Intel, AMD Radeon, Nvidia graphics cards on a Linux-based operating system. Just the other day it enabled OpenGL 4.5 support for Intel Haswell GPUs, which is already a big achievement.

Android Leftovers

  • Donald Trump has surrendered his Android phone
    Donald Trump has given up his beloved Android phone ahead of today’s inauguration, the Associated Press reports, though it is unclear what type of device he will use in the White House. According to The New York Times, Trump is now using a more secure, encrypted handset that was approved by the Secret Service. He also has a different phone number, the Times reports, citing people close to the president-elect. Trump doesn’t use email, but he does use his Android phone to tweet. He’s also been very accessible throughout the presidential campaign and transition, taking calls from reporters, politicians, and world leaders. Malcolm Turnbull, the prime minister of Australia, called Trump to congratulate him on his electoral victory after getting his cellphone number from professional golfer Greg Norman.
  • Best affordable Android smartphones you can buy [January 2017]
    There are new smartphones hitting the market constantly, but which is the best to pick up when you’re trying to save a buck or two? We’ve seen some great launches this summer and we’re only expecting more over the coming months, but for now, let’s go over the best affordable Android smartphones you can go pick up today…
  • A list of every Samsung phone getting Android 7.0 Nougat this year
  • WatchMaker to support Gear S2 & Gear S3, 1000s of watchfaces incoming
    WatchMaker, a popular Android and Android Wear watchface platform, has some good news for our readers. They are currently in the process of expanding their supported platforms and will be targeting Tizen and its latest wearable smartwatches, the Samsung Gear S2 and Gear S3.