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today's leftovers

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  • Hands-On Lab: Oracle Linux Disk Encryption Using Network Based Key Services

    Many Linux environments require data to be encrypted at rest but that can add administrative overhead to the boot process. Oracle Linux has supported disk encryption since version 5 but a feature was added in 7 update 4 to allow the automatic unlocking of devices based on external network services. Network Bound Disk Encryption (NBDE) uses a network based key service to validate a system is on a trusted network and unlock encrypted disks upon boot. By combining NBDE and a keyboard entered passphrase the system will unlock a disk automatically during boot but allow administrators to use a passphrase during maintenance operations.

    A new hands-on lab Oracle Linux Disk Encryption Using Network Based Key Services is now available for anyone to learn the concepts of Linux disk encryption. The lab begins with the creation of a encrypted block device dependent on a passphrase and continues to an example of network based keys to unlock the device. Oracle Linux 8 is used but the same tools are available on Oracle Linux 7. The base components involved include dm-crypt which allows arbitrary block devices to be encrypted, Linux Unified Key Setup (LUKS) a disk encryption standard and cryptsetup which is used to configure our disks. We continue to include Tang, a network service that provides cryptographic services over HTTP and Clevis, an encryption framework. Clevis can use keys provided by Tang as a passphrase to unlock LUKS volumes.

  • Mir 1.7.1 Released With X11 Support Promoted Out Of "Experimental" Phase

    Most significant with Mir 1.7.1 is the X11 support being improved to the point that it's no longer considered experimental for running traditional X11 software atop Wayland. Passing --enable-x11 now can be used for enabling the X11 support rather than the prior "x11-display-experimental" option. Mir 1.7.1 saw a lot of work to the XWayland and X11 window manage code, including a new display FD option.

  • SUSE Manager 4 Brings the Power of DevOps to Your Enterprise Linux Environment

    DevOps is an IT management philosophy that requires speed, efficiency and confidence. A DevOps environment is constantly evolving: Containers spin up, new applications appear, tools are tested and updates happen—all without stoppages or significant downtime.

  • Liquid Prep, a solution that helps farmers optimize water usage during droughts, is now open source

    When a prolonged absence of water in a region leads to drought conditions, the entire ecosystem suffers. Among those hardest hit are farmers, and the impact on their land can have ripple effects on the larger population. These larger problems can range from health issues or food security, while also creating conditions that increase the risk of wildfires and dust storms.

    Created by five technologists from the IBM offices in Ottawa, Ontario, Canada, Liquid Prep is a solution designed for low-literate farmers in developing countries whose success hinges on access to advanced agricultural advice. By leveraging the use of an intuitive mobile Android app, local soil sensors, and weather forecast information as well as an advanced agricultural decision platform hosted on IBM Cloud, farmers are better informed on how to use limited water supplies and increase their chances of growing healthy crops for their small plots of land.

  • Linux-ready SBCs and mini-PCs run Ryzen Embedded, including new 8-10W R1305G

    Sapphire unveiled NP-FP5 and BP-FP5 SBCs with Ryzen V1000 and R1000 SoCs plus a G-series board, and Simply NUC revealed Red Oak (NP-FP5) and Post Oak (BP-FP5) mini-PCs based on the Ryzen SBCs. The NP-FP5 and Red Oak support AMD’s new 8-10W R1305G.

    At Embedded World, Sapphire Technology announced a pair of 4 x 4-inch (101.6 x 101.6mm) SBCs that run Linux or Win 10 on AMD’s x86-based Ryzen Embedded V1000 and R1000 SoCs. The dual 4K display NP-FP5 and more feature-rich, triple 4K display BP-FP5 SBCs support the same V1000 and R1000 models. The lower-end NP-FP5 also supports the low-power, 8-10W TDP R1305G, which was announced today by AMD along with a 6W R1102G.

  • Mirantis co-founder launches FreedomFi to bring private LTE networks to enterprises

    Boris Renski, the co-founder of Mirantis, one of the earliest and best-funded players in the OpenStack space a few years ago (which then mostly pivoted to Kubernetes and DevOps), has left his role as CMO to focus his efforts on a new startup: FreedomFi. The new company brings together open-source hardware and software to give enterprises a new way to leverage the newly opened 3.5 GHz band for private LTE and — later — 5G IoT deployments.

  • WordPress 5.4 Beta 3

    WordPress 5.4 Beta 3 is now available!

    This software is still in development, so we don’t recommend you run it on a production site. Consider setting up a test site to play with the new version.

    [...]

    WordPress 5.4 is slated for release on March 31st, 2020, and we need your help to get there.

    Thanks to the testing and feedback from everyone who tested beta 2 (and beta 1) over 24 tickets have been closed in the past week.

  • Luis Villa: Surviving 2020 on Twitter

    At some point in the past few years, I accepted that I’m going to have a baseline level of anger about the state of the world, and that I have to focus on what I can change and let go of what I can’t. (Twitter anger is the latter.) So what can I change? Where is my anger productive?

    I’ve found that doing things offline—for me, mostly giving money—really helps. In particular, giving to causes that seek systemic (usually, that means political/government) change like 350.org and local activist groups, and giving a lot, and regularly. This, frankly, makes it a lot easier for me to ignore anger online — each new tweet is not likely to make me be more angry, or give more, because I’m already basically giving what I can. Being confident about that really reduced my FOMO when I started filtering aggressively.

    I hear from non-parents/non-startup-founders that physical-world activism (door-knocking, phone banking, local gov meeting-attending, etc.) can be great in this way too but sadly I can’t confirm Sad

    (I also want to acknowledge that, in the current state of the world, ‘letting go’ gets harder the less privilege you have. I have no great response to that, except to say that I empathize and am trying to fight for you where and how I can.)

  • Why Source Code Scanning Tools are Essential to Open Source Compliance [Ed: This promotes proprietary software of Microsoft 'proxies', along with FUD, to make proprietary software sales]

    There are many scanning tools and vendors to choose from. For example, Black Duck, WhiteSource, and FOSSA are well-known vendors that offer scanning tools on a subscription basis. FOSSology is an open source scanning tool maintained by the Linux Foundation, but it doesn’t come with a pre-populated library of open source code or software repository, which you would need to build on your own.

  • Google and Microsoft are scaring consumers over Edge extensions, and for what?

    Simply trying to install a Chrome extension via the Chrome Web Store actually requires navigating through several warnings, from both Google and Microsoft, about where to go to install an extension. The confusion and frustration this no doubt creates with users reflects poorly on both sides.

More in Tux Machines

Rolando Blanco: Ubuntu Desktop Makeover

I must confess that since Ubuntu started, there have been a lot of changes that we have experienced on our desktop (each time for the better). However, I have always loved changing its appearance, to one more according to my particular tastes, sometimes up to 3 changes per year. This is one of the features that I like most about GNU / Linux, the freedom to adapt everything to my liking. This time, I wanted to make some slight changes in search of elegant minimalism. This is how I started testing a new icon pack and a tool that works as a widget and that animates my desktop, for this I used Conky. Read more

WiFi Goes Open

For most people, adding WiFi to a project means grabbing something like an ESP8266 or an ESP32. But if you are developing your own design on an FPGA, that means adding another package. If you are targeting Linux, the OpenWifi project has a good start at providing WiFi in Verilog. There are examples for many development boards and advice for porting to your own target on GitHub. You can also see one of the developers, [Xianjun Jiao], demonstrate the whole thing in the video below. The demo uses a Xilinx Zynq, so the Linux backend runs on the Arm processor that is on the same chip as the FPGA doing the software-defined radio. We’ll warn you that this project is not for the faint of heart. If you want to understand the code, you’ll have to dig into a lot of WiFi trivia. Read more

Kernel: Linux 5.8, Linux 5.7, FSGSBASE and HWMON

  • Improved EXT4 + XFS DAX Implementation Appears Ready To Go For Linux 5.8

    Adding to the expected changes for Linux 5.8 is improved EXT4 and XFS file-system direct access "DAX" support. DAX is the means of direct access to files backed by persistent memory (such as Intel Optane DC Persistent Memory) without needing to be copied via the page cache. Thus DAX bypasses that extra copy for reads/writes to the storage device and mapping the storage device directly into user-space.

  • The Top Linux 5.7 Features From Apple Fast Charge To Official Tiger Lake Graphics

    Assuming no last minute concerns, the Linux 5.7 kernel is set to debut as stable this weekend. Given all the weeks since the merge window and our many articles covering all the feature activity at that point (and not to be confused with our activity of new work being queued for the upcoming Linux 5.8 cycle), here is a look back at some of the top features of the Linux 5.7 kernel. Among the most interesting new features and improvements for Linux 5.7 include: - Intel Tiger Lake "Gen12" graphics are now enabled by default in being deemed stable enough for out-of-the-box support where as on prior kernels the support at the time was hidden behind a kernel module parameter.

  • Performance-Helping FSGSBASE Patches Spun For Linux A 13th Time

    The FSGSBASE Linux kernel patches that have the potential of helping performance going back to Intel Ivy Bridge era CPUs in select workloads have now hit their 13th revision to the series in the long-running effort to getting this support mainlined.

  • Linux's Hardware Monitoring "HWMON" Picking Up Notification Support

    In addition to the AMD Zen "amd_energy" driver coming for Linux 5.8, another late change now queued into hwmon staging is introducing notification support for the hardware monitoring subsystem. HWMON subsystem maintainer and Google employee Guenter Roeck has queued up notification support for this subsystem. This serves as a generic notification mechanism not only to notify user-space but also the thermal subsystem for any HWMON driver events. In the HWMON context, these events could be important like warnings/critical alarms over detected temperatures or voltages for different components.

Linux on Devices and Open Hardware/Modding

  • Developing Qt5 applications natively on Wind River Linux

    Wind River Linux provides the technologies essential to building a flexible, stable, and secure platform for your embedded devices. Based on OpenEmbedded releases from the Yocto Project, it is designed to let you customize your platform to include only the packages and features you need. Powered by bitbake, it provides the ability to build an entire Linux distribution from source by following repeatable recipes. This is really powerful, but can be foreign to application developers that already have a workflow they are comfortable with. Developers building graphical user interfaces (GUI) have their own set of tools that they rely on. Often they prefer to use an Integrated Development Environment (IDE) tailored to the language and frameworks they are working with. Typically this IDE and the tools it uses are running natively on the same platform they are building for. Fortunately, these developers can still do this on Wind River Linux. This tutorial describes building Wind River Linux with the GCC toolchain and Qt Creator included to enable native application development.

  • Udoo Bolt Gear mini-PC launches with Ryzen V1000 Udoo Bolt SBC

    Seco has launched a $399 “Udoo Bolt Gear” mini-PC kit built around its Ryzen Embedded V1000 based Udoo Bolt SBC. The $399 kit includes a metal case, 65W adapter, and a WiFi/BT M.2 card. A growing number of open-spec, community-backed SBCs ship with optional. and in some cases, standard enclosures, but most of these are simple plastic cases. Seco’s new Udoo Bolt Gear mini-PC, which is based on its Udoo Bolt SBC, provides a metal case, a power adapter, US and EU cables, a VESA mount, and a WiFi/BT kit. There are also plenty of vents to help the SBC’s standard fan cool AMD’s Ryzen Embedded V1000 SoC. [...] The Bolt and the Bolt Gear are further equipped with an Arduino Leonardo compatible Microchip Atmega32U4 MCU. The MCU can be used for robotics and other real-time applications. It can also be configured to run while the system is turned off and then turn on the computer based on trigger input.

  • Ultra-narrow DipDuino Arduino Compatible Board is a Perfect Breadboard Companion

    We previously wrote about a uChip DIP-sized Arduino Zero compatible board with 0.3″ spacing between the two rows of pins making it perfect for breadboards as it left four rows on each side of the breadboard. There’s now another similar option with the appropriately named DipDuino board equipped with a Microchip Atmega328P MCU compatible with Arduino Pro or Pro Mini boards.

  • Using Photoresistor From Raspberry PI To Detect Light

    Photoresistor (also known as photocell) is a Light Dependent Resistor (LDR). As the name suggests, this components act just like a resistor, changing its resistance in response to how much light is falling on it. Ususally, photoresistors have a very high resistance in near darkness and a very low resistance in bright ligh. This component is used to manage electronic or electric devices to answer light conditions enabling or disabling functions. Photoresistors are analogic components. So it can be used with microcontrollers having analogic inputs (like Arduino) to read light level. Unfortunately, Raspberry PI has only digital inputs (with threshold between High and Low being around 1V). This means that, without specific analogic-to-digital hardware, we’ll be able only to read if light is high or low.