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Navigating the Bash shell with pushd and popd

Wednesday 7th of August 2019 07:02:00 AM

The pushd and popd commands are built-in features of the Bash shell to help you "bookmark" directories for quick navigation between locations on your hard drive. You might already feel that the terminal is an impossibly fast way to navigate your computer; in just a few key presses, you can go anywhere on your hard drive, attached storage, or network share. But that speed can break down when you find yourself going back and forth between directories, or when you get "lost" within your filesystem.


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Intro to Corteza, an open source alternative to Salesforce

Wednesday 7th of August 2019 07:01:00 AM

Corteza is an open source, self-hosted digital work platform for growing an organization's productivity, enabling its relationships, and protecting its work and the privacy of those involved. The project was developed entirely in the public domain by Crust Technology. It has four core features: customer relationship management, a low-code development platform, messaging, and a unified workspace.


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Why fear of failure is a silent DevOps virus

Wednesday 7th of August 2019 07:00:00 AM

Do you recognize the following scenario? I do, because a manager once stifled my passion and innovation to the point I was anxious to make decisions, take risks, and focus on what's important: "uncovering better ways of developing software by doing it and helping others do it" (Agile Manifesto, 2001).

Developer: "The UX hypothesis failed. Users did not respond well to the new navigation experience, resulting in 80% of users switching back to the classic navigation."


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Unboxing the Raspberry Pi 4

Tuesday 6th of August 2019 07:03:00 AM

When the Raspberry Pi 4 was announced at the end of June, I wasted no time. I ordered two Raspberry Pi 4 Starter Kits the same day from CanaKit. The 1GB RAM version was available right away, but the 4GB version wouldn't ship until July 19th. Since I wanted to try both, I ordered them to be shipped together.


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Is Perl going extinct?

Tuesday 6th of August 2019 07:02:00 AM

Is there an endangered species list for programming languages? If there is, Command Line Heroes suggests that Perl is somewhere between vulnerable and critically endangered. The dominant language of the 1990s is the focus of this week's podcast (Season 3, Episode 4) and explores its highs and lows since it was introduced over 30 years ago.


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3 tools for doing presentations from the command line

Tuesday 6th of August 2019 07:01:00 AM

Tired of creating and displaying presentation slides using LibreOffice Impress or various slightly geeky tools and frameworks? Instead, consider running the slides for your next talk from a terminal window.


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Avoiding burnout: 4 considerations for a more energetic organization

Tuesday 6th of August 2019 07:00:00 AM

In both personal and organizational life, energy levels are important. This is no less true of open organizations. Consider this: When you're tired, you'll have trouble adapting when challenges arise. When your energy is low, you'll have trouble collaborating with others. When you're feeling fatigued, building and energizing an open organization community is difficult.


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Navigating the filesystem with relative paths at the command line

Monday 5th of August 2019 07:02:00 AM

If you’re on your way to work, but you stop by a deli for breakfast first, you don’t go back home after breakfast so you can restart your journey. Instead, you continue from where you are because you understand where your office is located relative to your current location. Navigating your computer is the same way. If you change your working directory in a terminal to a subdirectory, such as Pictures, you don’t necessarily have to go home again just to make your way into Documents. Instead, you use a relative path.


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PostgreSQL, managing Windows with Ansible, and more news

Monday 5th of August 2019 07:01:00 AM

In our second monthly Ansible Around The Web, we're sharing a smorgasbord of useful Ansible information for your delectation. Read on to find stories and videos relating to databases, security, VMware, Infoblox, and Windows!

If you find an interesting Ansible story on your travels, please send us the link via Mark on Twitter, and the Ansible Community team will curate the best submissions.

On with the show…


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What's your favorite open source BI software?

Monday 5th of August 2019 07:00:00 AM

Open source software has come a long way since the Open Source Initiative was founded in February 1998. Back then, the thought of releasing source code anyone could change scared many commercial software vendors. Now, according to Red Hat's 2019 State of Enterprise Open Source survey, 99% of IT leaders say open source software plays at least a "somewhat important" role in their enterprise IT strategy.


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Protect your privacy on the internet

Saturday 3rd of August 2019 07:00:00 AM

The idea that internet privacy is important only if you have something to hide is a misconception, says Nathan Handler. Privacy is something we should all care about to protect ourselves and the people we communicate with, whether or not we're doing anything wrong or embarrassing, he says.


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The fastest open source CPU ever, Facebook shares AI algorithms fighting harmful content, and more news

Saturday 3rd of August 2019 07:00:00 AM

In this edition of our open source news roundup, we share Facebook's choice to open source two algorithms for finding harmful content, Apple's new role in the Data Transfer Project, and more news you should know.


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Understanding file paths and how to use them in Linux

Friday 2nd of August 2019 07:02:00 AM

A file path is the human-readable representation of a file or folder’s location on a computer system. You’ve seen file paths, although you may not realize it, on the internet: An internet URL, despite ancient battles fought by proprietary companies like AOL and CompuServe, is actually just a path to a (sometimes dynamically created) file on someone else’s computer.


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New research article type embeds live code and data

Friday 2nd of August 2019 07:01:00 AM

While science is supposed to be about building on each other's findings to improve our understanding of the world around us, reproducing and reusing previously published results remains challenging, even in the age of the internet. The basic format of the scientific paper—the primary means through which scientists communicate their findings—has more or less remained the same since the first papers were published in the 18th century.


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Getting started with the BBC Microbit

Friday 2nd of August 2019 07:00:00 AM

Whether you are a maker, a teacher, or someone looking to expand your Python skillset, the BBC:Microbit has something for you. It was designed by the British Broadcasting Corporation to support computer education in the United Kingdom.

The open hardware board is half the size of a credit card and packed with an ARM processor, a three-axis accelerometer, a three-axis magnetometer, a Micro USB port, a 25-pin edge connector, and 25 LEDs in a 5x5 array.


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Linux permissions 101

Thursday 1st of August 2019 07:02:00 AM

Understanding Linux permissions and how to control which users have access to files is a fundamental skill for systems administration.

This article will cover standard Linux file systems permissions, dig further into special permissions, and wrap up with an explanation of default permissions using umask.


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GitHub Pages is a CI/CD pipeline

Thursday 1st of August 2019 07:01:00 AM

One of GitHub's superpowers is the ability to magically turn your documentation into a website. If you configure a GitHub Page for your docs/ folder on your AwesomeProject website, you'll end up with yourname.github.io/awesomeproject, showing your documentation, all for free.


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Failure is a feature in blameless DevOps

Thursday 1st of August 2019 07:00:00 AM

DevOps is just another term for value stream development. What does value stream mean?

Value is what arises during our interactions with customers and stakeholders. Once we get into value stream development, we quickly realize that value is not an entity. Value constantly changes. Value is a process. Value is a flow.

Hence the term stream. Value is only value if it's a stream. And this streaming of value is what we call continuous integration (CI).


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Bash aliases you can’t live without

Wednesday 31st of July 2019 07:02:00 AM

A Bash alias is a method of supplementing or overriding Bash commands with new ones. Bash aliases make it easy for users to customize their experience in a POSIX terminal. They are often defined in $HOME/.bashrc or $HOME/bash_aliases (which must be loaded by $HOME/.bashrc).


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How to structure a multi-file C program: Part 2

Wednesday 31st of July 2019 07:01:00 AM

In Part 1, I laid out the structure for a multi-file C program called MeowMeow that implements a toy codec. I also talked about the Unix philosophy of program design, laying out a number of empty files to start with a good structure from the very beginning. Lastly, I touched on what a Makefile is and what it can do for you.


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More in Tux Machines

Audiocasts/Shows: Linux in the Ham Shack and Linux Headlines

  • LHS Episode #302: The End of Kenwood

    Welcome to Episode 302 of Linux in the Ham Shack. In this short topic episode, the hosts discuss the potential end of Kenwood in the amateur radio market, emcom in Montucky, Storm Area 51, HF on satellites, a huge update for PulseAudio, the Linux 5.3 kernel and much more. Thank you for listening and have a fantastic week.

  • 09/19/2019 | Linux Headlines

    Fresh init system controversy at the Debian project, a more scalable Samba, and a big release for LLVM. Plus GitHub's latest security steps and a new version of OBS Studio.

Android Leftovers

When Diverse Network ASICs Meet A Unifying Operating System

And it has also been a decade since switch upstart Arista Networks launched its Extensible Operating System, or EOS, which is derived from Linux. [...] The cross-platform nature of ArcOS, coupled with its ability to run in any function on the network, could turn out to be the key differentiator. A lot of these other NOSes were point solutions that could only be deployed in certain parts of the network, and that just creates animosity with the incumbent vendors that dominate the rest of the networking stack. Given the mission-critical nature of networking in the modern datacenter, it costs a great deal to qualify a new network operating system, and it can take a lot of time. If ArcOS can run across more platforms, qualify faster, and do more jobs in the network, then, says Garg, it has a good chance of shaking up switching and routing. “That totally changes the business conversation and the TCO advantages that we can bring to a customer across the entirety of their network.” Read more

Server: Kubernetes/OpenShift, OpenStack, and Red Hat's Ansible

  • 9 steps to awesome with Kubernetes/OpenShift presented by Burr Sutter

    Burr Sutter gave a terrific talk in India in July, where he laid out the terms, systems and processes needed to setup Kubernetes for developers. This is an introductory presentation, which may be useful for your larger community of Kubernetes users once you’ve already setup User Provisioned Infrastructure (UPI) in Red Hat OpenShift for them, though it does go into the deeper details of actually running the a cluster. To follow along, Burr created an accompanying GitHub repository, so you too can learn how to setup an awesome Kubernetes cluster in just 9 steps.

  • Weaveworks Named a Top Kubernetes Contributor

    But anyone who knows the history of Weaveworks might not be too surprised by this. Weaveworks has been a major champion of Kubernetes since the very beginning. It might not be too much of a coincidence that Weaveworks was incorporated only a few weeks after Kubernetes was open sourced, five years ago. In addition to this, the very first elected chair of the CNCF’s Technical Oversight Committee, responsible for technical leadership to the Cloud Native Foundation was also headed up by our CEO, Alexis Richardson(@monadic) (soon to be replaced by the awesome Liz Rice (@lizrice) of Aqua Security).

  • Improving trust in the cloud with OpenStack and AMD SEV

    This post contains an exciting announcement, but first I need to provide some context! Ever heard that joke “the cloud is just someone else’s computer”? Of course it’s a gross over-simplification, but there’s more than a grain of truth in it. And that raises the question: if your applications are running in someone else’s data-centre, how can you trust that they’re not being snooped upon, or worse, invasively tampered with?

  • Red Hat OpenStack Platform 15 Enhances Infrastructure Security and Cloud-Native Integration Across the Open Hybrid Cloud

    Red Hat, Inc., the world's leading provider of open source solutions, today announced the general availability of Red Hat OpenStack Platform 15, the latest version of its highly scalable and agile cloud Infrastructure-as-a-Service (IaaS) solution. Based on the OpenStack community’s "Stein" release, Red Hat OpenStack Platform 15 adds performance and cloud security enhancements and expands the platform’s ecosystem of supported hardware, helping IT organizations to more quickly and more securely support demanding production workloads. Given the role of Linux as the foundation for hybrid cloud, customers can also benefit from a more secure, flexible and intelligent Linux operating system underpinning their private cloud deployments with Red Hat Enterprise Linux 8.

  • Red Hat Ansible Automation Accelerates Past Major Adoption Milestone, Now Manages More Than Four Million Customer Systems Worldwide

    Red Hat, Inc., the world's leading provider of open source solutions, today announced that more than four million customer systems worldwide are now automated by Red Hat Ansible Automation. Customers, including Energy Market Company, Microsoft, Reserve Bank of New Zealand and Surescripts all use Red Hat Ansible Automation to automate and orchestrate their IT operations, helping to expand automation across IT stacks. According to a blog post by Chris Gardner with Forrester Research, who was the author of The Forrester Wave™: Infrastructure Automation Platforms, Q3 2019, "Infrastructure automation isn’t just on-premises or the cloud. It’s at the edge and everywhere in between."1 Since its launch in 2013, Red Hat Ansible Automation has provided a single tool to help organizations automate across IT operations and development, including infrastructure, networks, cloud, security and beyond.