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Updated: 1 week 2 days ago

Through the looking glass: Security and the SRE

Wednesday 28th of March 2018 07:00:00 AM

"We can no longer design state-dependent security in a stateless world." —Rinehart

"We form the hypothesis, but we never test it." —Bergstrom


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How to build a digital pinhole camera with a Raspberry Pi

Tuesday 27th of March 2018 07:03:00 AM

At the tail end of 2015, the Raspberry Pi Foundation surprised the world by releasing the diminutive Raspberry Pi Zero. What's more, they gave it away for free on the cover of the MagPi magazine. I immediately rushed out and trawled around several newsagents until I found the last two copies in the area. I wasn't sure what I would use them for, but I knew their small size would allow me to do interesting projects that a full-sized Pi could not satisfy.


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Reliable IoT event logging with syslog-ng

Tuesday 27th of March 2018 07:02:00 AM

For any device connected to the internet or a network, it's essential that you log events so you know what the device is doing and can address any potential problems. Increasingly those devices include Internet of Things (IoT) devices and embedded systems.


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Do you speak the same language as the rest of your team?

Tuesday 27th of March 2018 07:01:00 AM

A common, shared vocabulary is at the the heart of data quality and data management initiatives, not to mention effective team communication. On top of that, however, an explicit and common language also critical for maintaining a community-centered organizational culture.


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Loop better: A deeper look at iteration in Python

Tuesday 27th of March 2018 07:00:00 AM

Python's for loops don't work the way for loops do in other languages. In this article we're going to dive into Python's for loops to take a look at how they work under the hood and why they work the way they do.

Looping gotchas

We're going to start off our journey by taking a look at some "gotchas." After we've learned how looping works in Python, we'll take another look at these gotchas and explain what's going on.


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Digitizing VHS with Linux, creating a Bash completion script, Ansible, home automation, and more

Monday 26th of March 2018 04:20:00 PM

Last week our most popular articles covered a spectrum of fun and practical uses for technology at home and in the workplace. Here's the list of reader favorites from March 19-25:


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Manage your workstation with Ansible: Automating configuration

Monday 26th of March 2018 07:03:00 AM

Ansible is an amazing automation and configuration management tool. It is mainly used for servers and cloud deployments, and it gets far less attention for its use in workstations, both desktops and laptops, which is the focus of this series.

In the first part of this series, I showed you basic usage of the ansible-pull command, and we created a playbook that installs a handful of packages. That wasn't extremely useful by itself, but it set the stage for further automation.


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4 command line note-taking applications for Linux

Monday 26th of March 2018 07:02:00 AM

When you need to save a code snippet or a URL, an idea or a quote, you probably fire up a text editor or turn to a desktop or web-based note-taking tool. But those aren't your only options. If you spend time working in terminal windows, you can use one of the many note-taking tools available for the Linux command line.

Let's take a look at of those four apps.

tnote
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Start a blog in 30 minutes with Hugo, a static site generator written in Go

Monday 26th of March 2018 07:01:00 AM

Do you want to start a blog to share your latest adventures with various software frameworks? Do you love a project that is poorly documented and want to fix that? Or do you just want to create a personal website?


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How to create an open source stack using EFK

Monday 26th of March 2018 07:00:00 AM

Managing an infrastructure of servers is a non-trivial task. When one cluster is misbehaving, logging in to multiple servers, checking each log, and using multiple filters until you find the culprit is not an efficient use of resources.


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Top Linux tools for writers

Friday 23rd of March 2018 07:03:00 AM

If you've read my article about how I switched to Linux, then you know that I’m a superuser. I also stated that I’m not an “expert” on anything. That’s still fair to say. But I have learned many helpful things over the last several years, and I'd like to pass these tips along to other new Linux users.

Today, I’m going to discuss the tools I use when I write. I based my choices on three criteria:


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Digitizing VHS with Fedora

Friday 23rd of March 2018 07:02:00 AM

Just before Christmas, I decided it was time for my kids to see one of my favorite movies: The Muppet Christmas Carol. I grabbed the tape (yes, tape) off the shelf and put it in the VCR (yes, VCR) and... nothing happened. Oh no!


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How to tell when moving to blockchain is a bad idea

Friday 23rd of March 2018 07:01:00 AM

So, there's this thing called "blockchain" that is quite popular…


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7 steps to DevOps hiring success

Friday 23rd of March 2018 07:00:00 AM

As many of us in the DevOps scene know, most companies are hiring, or, at least, trying to do so. The required skills and job descriptions can change entirely from company to company. As a broad overview, most teams are looking for a candidate from either an operations and infrastructure background or someone from a software engineering and development background, then combined with key skills relating to continuous integration, configuration management, continuous delivery/deployment, and cloud infrastructure. Currently in high-demand is knowledge of container orchestration.


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Why so little love for the patent grant in the MIT License?

Friday 23rd of March 2018 07:00:00 AM

Too often, I hear it said that the MIT License has no patent license, or that it has merely some possibility of an "implied" patent license. If the MIT License was sensitive, it might develop an inferiority complex in light of the constant praise heaped on its younger sibling, the Apache License, which conventional wisdom says has a "real" patent license.


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How to create a Bash completion script

Thursday 22nd of March 2018 07:03:00 AM

I recently worked on creating a Bash completion script for a project, and I enjoyed it very much. In this post, I will try to familiarize you with the process of creating a Bash completion script.

What is Bash completion?

Bash completion is a functionality through which Bash helps users type their commands more quickly and easily. It does this by presenting possible options when users press the Tab key while typing a command.


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Tips for building a Kubernetes proof of concept

Thursday 22nd of March 2018 07:02:00 AM

What is the best way to introduce a new technology into your employer's ecosystem? You'd probably start by scheduling a meeting. But what if you're asked what the benefits are, if it will save money, and how it will make developers more efficient?

The answers may be obvious to you, but you need to be prepared to relay this information in a way that makes business sense. It's much easier to explain these benefits when you have a proof of concept.


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Where does OpenStack fit in a public cloud world?

Thursday 22nd of March 2018 07:01:00 AM

Public clouds are taking over the world. Every day, more and more companies are moving their infrastructure to services like AWS or Microsoft Azure to save capital and operational costs. This begs the question: Where does this leave OpenStack?

In this post, we'll explore how OpenStack is competing in a market dominated by public cloud providers, and how it is positioned to grow in the future, especially in the hybrid cloud business.


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Management alone can't drive open culture change

Thursday 22nd of March 2018 07:00:00 AM

Recently an article about the ways that profound social and cultural shifts are forcing a reorganization of the climate justice movement circulated. It contains a bit of criticism against the "Big Greens"—global non-profits like Greenpeace.

Those global non-profits, author Kevin Buckland argues, don't always resemble the empowered organizations they champion elsewhere:


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How to use Ansible to patch systems and install applications

Wednesday 21st of March 2018 07:03:00 AM

Have you ever wondered how to patch your systems, reboot, and continue working?

If so, you'll be interested in Ansible, a simple configuration management tool that can make some of the hardest work easy. For example, system administration tasks that can be complicated, take hours to complete, or have complex requirements for security.


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More in Tux Machines

Graphics: AMD, RADV, RadeonSI, Mesa 18.0.1

  • AMDGPU DRM Gets "GFXOFF" Patches To Turn Off Graphics Engine
    AMD's Huang Rui has posted a set of 20 patches providing "GFXOFF" support for the AMDGPU Direct Rendering Manager Linux kernel driver. GFXOFF is a new graphics processor feature that allows for powering off the graphics engine when it would otherwise be idle with no graphics workload. Obviously, this would equate to a potentially significant power savings with that engine being able to be shut-off.
  • RADV Driver Lands Support For Vulkan's New Descriptor Indexing Extension
    Earlier this month with the Vulkan 1.1.72 specification update was the new VK_EXT_descriptor_indexing extension that is quickly being well received by developers. The VK_EXT_descriptor_indexing extension allows for creating large descriptor sets made up of all their combined resources and selecting those resources via dynamic indexes in a shader.
  • RadeonSI Now Appears To Support "RX Vega M" With Intel Core CPUs
    One of the most common Linux hardware questions I've received dozens of times in the past few weeks alone has been over the support for "RX Vega M" Vega-based graphics processors found on select newer Intel Kabylake CPUs. It appears RadeonSI at least should now support these Radeon graphics on Intel CPUs.
  • mesa 18.0.1
  • Mesa 18.0.1 Released With A Number Of Fixes
    In addition to Mesa 17.3.9 being released today, Mesa 18.0.1 also rolled out the door as the first point release to last quarter's Mesa 18.0 series. Mesa 18.0.1 features improvements to its Meson build system support, several RADV Vulkan driver fixes, various fixes to the Gallium3D Nine (D3D9) state tracker, various Intel driver fixes, several core Mesa improvements, and then the other random smothering of fixes collected over the past few weeks.

Programming: nGraph Compiler, JavaScript Trademark, PyPI and Pip

  • Intel Opens Up nGraph Source Code For DNN Model Compiler
    Intel tonight announced they are open-sourcing their nGraph compiler code, which serves as a framework-neutral deep neural network model compiler. Intel claims with nGraph and Xeon Scalable hardware that researchers can obtain up to 10x performance improvements over previous TensorFlow integrations, as one example. Besides TensorFlow, nGraph also supports PyTorch, MXNet, Neon, Caffe2, and CNTK while also planning to support other frameworks moving forward.
  • Why it's finally time to give up on the name JavaScript
    An iOS developer has apparently received a cease and desist notice from Oracle over the use of the word "JavaScript" in the title of their app. The developer, Tyanya Software, shared the notice on perennial internet soapbox Reddit to seek advice on how to fight the order. [...] If user reviews are any indication, the app is not even particularly good, with reviewers stating things such as "Not ready for production," "Does not work as advertised," and "Waste of money, don't buy this." The last update to the app was in 2014, which the changelog notes was only an upgrade to add support for iOS 8. The app developer is at least honest about the intent behind the unwieldy name for the app, saying in a Reddit comment that "we game the App Store ranking by adding all the keywords to the app name." While Oracle has a duty to protect their trademarks, this type of legal bludgeoning underscores a historical problem that has been left unaddressed for too long: JavaScript is a terrible name for the thing being described. It has nothing to do with Java, an actual product developed by Sun (now owned by Oracle). JavaScript was developed at Mozilla, and the name was changed during beta releases of Netscape Navigator 2.0 from "LiveScript" to "JavaScript." It has, for some time, caused confusion among casual web users about the difference between Java and JavaScript. Given that ECMAScript is also a trademarked term, it seems best to revert to calling the language "LiveScript" to undercut trademark-related legal posturing. [...] Oracle declined to comment on this story.
  • New PyPI launched
    The new PyPI has been launched. Browser traffic and API calls (including "pip install") have been redirected from the old pypi.python.org to the new site. The old PyPI will shut down on April 30. LWN covered the new PyPI last week.
  • Pip 10.0 has been released
    The release of pip 10.0 has been announced. Some highlights of this release include the removal of Python 2.6 support, limited PEP 518 support (with more to come), a new "pip config" command, and other improvements.

Meltdown/PTI Mitigation Impact On BSDs vs. Linux

Besides the fresh BSD/Linux disk performance tests, some other tests I ran on various BSDs and Linux distributions this week was looking at the performance impact of Intel Meltdown CPU vulnerability mitigation on each of them, namely the performance impact of using kernel page-table isolation. On DragonFlyBSD 5.2, TrueOS 18.03, Ubuntu 16.04, Ubuntu 18.04, and Clear Linux I ran tests when the mitigation was enabled and then again when it was off for seeing the performance impact. Read more

Red Hat and Fedora Leftovers

  • Enterprise Node.js on OpenShift, April 19th, 12 p.m. EDT
    The next online DevNation Live Tech Talk is Thursday, April 19th at 12pm EDT. The topic is “Enterprise Node.js on Red Hat OpenShift” presented by Lance Ball, and hosted by Burr Sutter. The popularity of JavaScript on the front end and the JSON format for data has led to a “JavaScript Everywhere” movement with Node.js at the center. Node.js offers developers an event-driven, non-blocking I/O model that is perfect for high concurrency, low-latency applications that run across distributed devices. Its reactive architecture makes it an ideal technology for containerized microservices architectures you’ve been hearing so much about.
  • President to President with Luc Villeneuve, Red Hat Canada
    ITWC President Fawn Annan gets to the point with Red Hat’s general manager for Canada. Villeneuve speaks about building the open source technology firm in the country, the unique differences when dealing with the Quebec market, and how he fosters a positive culture in the workplace. Plus, he dishes on how his experience in journey hockey taught him how to build a successful sales team.
  • Be mindful of jumping into an open source project too soon: RedHat CTO
    Open source software has long been seen as a movement towards collaborative development. In a conversation with BusinessLine, Chris Wright, Vice-President & CTO at RedHat, talks about some of the challenges the open source community is facing and why it is important to set expectations right when it comes to promoting open source software. Edited excerpts:
  • DevOps Tool Market Global Manufacturers: Chef, Atlassian, Saltstac, Red Hat and Docker Inc.
  • Two sizzlers stock’s are not to be missed: Red Hat, Inc. (RHT), Navient Corporation (NAVI)
  • Fedora Community Blog: Fedora meetup at Pune – March 2018
    Long time we did not had any meetup at Pune, Maharashtra, India, so we decided to get started again. Details about this meetup are available at Fedora Wiki page. Planning for meetup started 1 month before. Initially Ompragash proposed to have meetup.com account for Fedora Pune to get more awareness. Later dropped this plan, since this is not only Fedora Pune level topic but applicable for all Fedora events.
  • Fedora 28 Beta – dnf system-upgrade
    Used DNF to remove duplicate rpms, reinstalled the new kernel and libwbclient, and corrected GNOME’s right-click behaviour, and all is well.