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7 steps to securing your Linux server

Tuesday 8th of October 2019 07:03:00 AM

This primer will introduce you to basic Linux server security. While it focuses on Debian/Ubuntu, you can apply everything presented here to other Linux distributions. I also encourage you to research this material and extend it where applicable.

1. Update your server

The first thing you should do to secure your server is to update the local repositories and upgrade the operating system and installed applications by applying the latest patches.

On Ubuntu and Debian:


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Fight for the planet: Building an open platform and open culture at Greenpeace

Tuesday 8th of October 2019 07:02:00 AM

Global problems require global solutions.

Few organizations know this better than Greenpeace. For nearly 50 years, the non-profit has been campaigning for a greener and more peaceful future.

But in 2015, Greenpeace found itself at a crossroads. To address the climate emergency, Greenpeace knew it needed to shift its organizational culture.


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Manage multiple versions of Go with GVM

Tuesday 8th of October 2019 07:00:00 AM

Go Version Manager (GVM) is an open source tool for managing Go environments. It supports installing multiple versions of Go and managing modules per-project using GVM "pkgsets." Developed originally by Josh Bussdieker, GVM (like its Ruby counterpart, RVM) allows you to create a development environment for each project or group of projects, segregating the different Go versions and package dependencies to allow for more flexibility and prevent versioning issues.


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How to manage Go projects with GVM

Tuesday 8th of October 2019 07:00:00 AM

Go Version Manager (GVM) is an open source tool for managing Go environments. It supports installing multiple versions of Go and managing modules per-project using GVM "pkgsets." Developed originally by Josh Bussdieker, GVM (like its Ruby counterpart, RVM) allows you to create a development environment for each project or group of projects, segregating the different Go versions and package dependencies to allow for more flexibility and prevent versioning issues.


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What programming language would you teach a kid first?

Tuesday 8th of October 2019 07:00:00 AM

For the 10th year in a row, the Finding Ada Network celebrates Ada Lovelace Day on the second Tuesday of October. It is a global celebration with flagship and grassroots events honoring the achievements and contributions of women in science, technology, engineering, and math (STEM).


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Announcing the All Things Open 2019 lightning talk lineup

Monday 7th of October 2019 05:10:00 PM

If you're attending the All Things Open conference in Raleigh, NC this year be sure to check out our Lightning Talk series on Tuesday, October 15 at 12:45 pm EDT.


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7 Java tips for new developers

Monday 7th of October 2019 07:03:00 AM

Java is a versatile programming language used, in some way, in nearly every industry that touches a computer. Java's greatest power is that it runs in a Java Virtual Machine (JVM), a layer that translates Java code into bytecode compatible with your operating system. As long as a JVM exists for your operating system, whether that OS is on a server (or serverless, for that matter), desktop, laptop, mobile device, or embedded device, then a Java application can run on it.


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Using the Java Persistence API

Monday 7th of October 2019 07:00:00 AM

The Java Persistence API (JPA) is an important Java functionality for application developers to understand. It translates exactly how Java developers turn method calls on objects into accessing, persisting, and managing data stored in NoSQL and relational databases.


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Introduction to open source observability on Kubernetes

Monday 7th of October 2019 07:00:00 AM

With the advent of DevOps, engineering teams are taking on more and more ownership of the reliability of their services. While some chafe at the increased operational burden, others welcome the opportunity to treat service reliability as a key feature, invest in the necessary capabilities to measure and improve reliability, and deliver the best possible customer experiences.


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What's in an open source name?

Friday 4th of October 2019 07:02:00 AM

GNOME, Java, Jupyter, Python. If your friends or family members have ever eavesdropped on your work conversations, they might think you've made a career in Renaissance folklore, coffee roasting, astronomy, or zoology. Where did the names of these open source technologies come from? We asked our writer community for input and rounded up some of our favorite tech name origin stories.


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9 essential GNU binutils tools

Friday 4th of October 2019 07:01:00 AM

Imagine not having access to a software's source code but still being able to understand how the software is implemented, find vulnerabilities in it, and—better yet—fix the bugs. All of this in binary form. It sounds like having superpowers, doesn't it?

You, too, can possess such superpowers, and the GNU binary utilities (binutils) are a good starting point. The GNU binutils are a collection of binary tools that are installed by default on all Linux distributions.


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Quantum computing, the open source way

Friday 4th of October 2019 07:00:00 AM
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The quantum vision of reality is both strange and mesmerizing at the same time. As theoretical physicist Michio Kaku once said, "Common sense has no place in quantum mechanics."


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Sharing vs. free vs. public: The real definition of open source

Thursday 3rd of October 2019 07:02:00 AM

When you hear the term open source, do you think this is synonymous with terms such as shareware, freeware, or public domain? If so, you are not alone. Many people, both within and without the technology industry, think of these terms as one and the same. This article illustrates how these terms are different and how open source is a transformative licensing and development model. Perhaps the best way to explore the differences will be to share my experience with software provided under one of the above models.


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Introducing the guide to getting started with Kubernetes

Thursday 3rd of October 2019 07:02:00 AM

Whether you are new to Kubernetes or are regarded as an expert, our new eBook is for you. In Getting started with Kubernetes, author Scott McCarty makes the business case for Kubernetes and lays the groundwork for implementation. Before digging into the logistics (pun intended), McCarty provides readers with a relatable analogy: Kubernetes is a dump truck


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4 open source eBook readers for Android

Thursday 3rd of October 2019 07:00:00 AM

Who doesn't like a good read? Instead of frittering away your time on social media or a messaging app, you can enjoy a book, magazine, or another document on your Android-powered phone or tablet.

To do that, all you need is the right eBook reader app. So let's take a look at four solid, open source eBook readers for Android.


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3 command line games for learning Bash the fun way

Wednesday 2nd of October 2019 07:02:00 AM

Learning is hard work, and nobody likes work. That means no matter how easy it is to learn Bash, it still might feel like work to you. Unless, of course, you learn through gaming.


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How to create the user interface for your Corteza Low Code application

Wednesday 2nd of October 2019 07:01:00 AM

In the first two articles in this series, I explained how to use Corteza Low Code to create an application to track donations and set up its data structure with modules and fields. In the third article, I will explain how to create the graphical part of the Donations application.


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7 Bash history shortcuts you will actually use

Wednesday 2nd of October 2019 07:00:00 AM

Most guides to Bash history shortcuts exhaustively list every single one available. The problem with that is I would use a shortcut once, then glaze over as I tried out all the possibilities. Then I'd move onto my working day and completely forget them, retaining only the well-known !! trick I learned when I first started using Bash.

So most of them were never committed to memory.


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How to keep your messages private with an open source app

Tuesday 1st of October 2019 07:01:00 AM

Messaging apps have changed how we communicate. Where would we be today without SMS? Can you imagine returning to a world where near-instant communication is not pervasive?


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Earning, spending, saving: The currency of influence in open source

Tuesday 1st of October 2019 07:00:00 AM

The acquisition and application of influence is a vital aspect of any organization. But the manner in which people acquire influence can vary widely. In traditional, hierarchical organizations, for example, someone might acquire influence by virtue of their title or position in a hierarchy. In government organizations, someone might acquire influence by virtue of being elected. On social media, someone might acquire influence through endless self-promotion. Or someone might acquire influence through inheritance or wealth.


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More in Tux Machines

Games: AI War 2, Dominus Galaxia, Sipho, Lonely Mountains: Downhill and More

  • AI War 2, the massive RTS game confirmed for launch on October 22

    Arcen Games have now fully confirmed that October 22 is the final launch date for AI War 2 to leave Early Access. This is the sequel to the critically acclaimed AI War: Fleet Command released back in 2009, which eventually came to Linux too later in 2014. The release of AI War 2 is going to mark 10 years since the original! Funded on Kickstarter back in 2016 with the help of around 2,545 backers. AI War 2 is a grand strategy RTS hybrid against an overwhelming, inhuman enemy who has conquered the galaxy. The enemy has made only a single error: underestimating you. You must steal as much technology as you can, take enough territory to fortify your bases and launch your last stand.

  • Dominus Galaxia, a 4x strategy game heavily inspired by Master of Orion 1 has a Linux demo up

    Their aim with Dominus Galaxia is to be an upgraded spiritual successor to the original Master of Orion, they said to think of it like if Master of Orion 2 was a proper sequel and not a "a radical re-imagining". It's currently crowdfunding on Kickstarter which has 10 days to go with nearly 50% of the funding needed, with a bit of a stretch it may be able to make it. Just recently, they put up a full demo of the game with Linux support on itch.io.

  • Creature building action and survival game 'Sipho' adds some fun new zooids for your monstrosity

    Swim, kill, adapt and hopefully survive. That's the aim of the game in Sipho and the recent update adds in some new pieces for you to unlock to build your horrific sea creature with. It's such a strange game, blending together furious action with a creature builder where you unlock different parts and species. Based on real science, inspired by the Siphonophorae with your creature being built with zooids, an animal that forms part of a colony that all move together.

  • No Linux version of Lonely Mountains: Downhill yet due to IL2CPP in Unity

    Megagon Industries have now confirmed the status of Lonely Mountains: Downhill for Linux and currently it's not good news. This is a game that was funded on Kickstarter, that had Linux as a platform for release. If this sounds familiar, it's because we wrote about this game recently where the developer seemed a bit confused on the Linux version and they weren't clear on what they were doing.

  • Project RIP, a new FPS released recently with Linux support and it looks action-packed

    Fight off waves of demons in Project RIP from developer Storming Tech, a new Unreal Engine first-person shooter that has Linux support. This is the same developer who also made Escape Legacy: Ancient Scrolls, an escape room puzzle game which also seemed quite good.

  • The Northgard free Conquest expansion is launching October 22

    The huge free Conquest expansion for the strategy game Northgard is now confirmed to be releasing on October 22. As announced before this free update is going to include a new standalone game mode, which can be played solo or in co-op. Offering up a series of missions, offering a what they claim is "100+" hours of extra possible play time. The missions don't seem to be linked, offering up something new each time with specific victory conditions and rule sets.

  • The impressively smooth roguelike Jupiter Hell has a big AI upgrade and a first sale

    ChaosForge continue advancing their turn-based shooter roguelike shooter Jupiter Hell, with another big update now available. A big focus has been on the AI to actually make it a bit smarter. Humanoid enemies will now attempt to take cover and not always run in a straight line at you, which can make it a little more difficult for sure. Most enemies will also react to noise you and other NPCs make. The demon-like enemies will now track you by smell, so you can't hide from them. You might find the need to retreat more often, to find a better position.

Red Hat and Fedora: syslog-ng, Ansible, Libinput and Fedora Community

  • syslog-ng in two words at One Identity UNITE: reduce and simplify

    UNITE is the partner and user conference of One Identity, the company behind syslog-ng. This time the conference took place in Phoenix, Arizona where I talked to a number of American business customers and partners about syslog-ng. They were really enthusiastic about syslog-ng and emphasized two major reasons why they use syslog-ng or plan to introduce it to their infrastructure: syslog-ng allows them to reduce the log data volume and greatly simplify their infrastructure by introducing a separate log management layer. [...] When you collect log messages to a central location using syslog-ng, you can archive all of the messages there. If you add a new log analysis application to your infrastructure, you can just point syslog-ng at it and forward the necessary subset of log data there. Life at both security and operations in your environment becomes easier, as there is only a single software to check for security problems and distribute on your systems instead of many.

  • Ansible vs Terraform vs Juju: Fight or cooperation?

    Ansible vs Terraform vs Juju vs Chef vs SaltStack vs Puppet vs CloudFormation – there are so many tools available out there. What are these tools? Do I need all of them? Are they fighting with each other or cooperating? The answer is not really straightforward. It usually depends on your needs and the particular use case. While some of these tools (Ansible, Chef, StaltStack, Puppet) are pure configuration management solutions, the others (Juju, Terraform, CloudFormation) focus more on services orchestration. For the purpose of this blog, we’re going to focus on Ansible vs Terraform vs Juju comparison – the three major players which have dominated the market. [...] Contrary to both Ansible and Terraform, Juju is an application modelling tool, developed and maintained by Canonical. You can use it to model and automate deployments of even very complex environments consisting of various interconnected applications. Examples of such environments include OpenStack, Kubernetes or Ceph clusters. Apart from the initial deployment, you can also use Juju to orchestrate deployed services too. Thanks to Juju you can backup, upgrade or scale-out your applications as easily as executing a single command. Like Terraform, Juju uses a declarative approach, but it brings it beyond the providers up to the applications layer. You can not only declare a number of machines to be deployed or number of application units, but also configuration options for deployed applications, relations between them, etc. Juju takes care of the rest of the job. This allows you to focus on shaping your application instead of struggling with the exact routines and recipes for deploying them. Forget the “How?” and focus on the “What?”.

  • libinput's bus factor is 1

    Let's arbitrarily pick the 1.9.0 release (roughly 2 years ago) and look at the numbers: of the ~1200 commits since 1.9.0, just under 990 were done by me. In those 2 years we had 76 contributors in total, but only 24 of which have more than one commit and only 6 contributors have more than 5 commits. The numbers don't really change much even if we go all the way back to 1.0.0 in 2015. These numbers do not include the non-development work: release maintenance for new releases and point releases, reviewing CI failures [1], writing documentation (including the stuff on this blog), testing and bug triage. Right now, this is effectively all done by one person. This is... less than ideal. At this point libinput is more-or-less the only input stack we have [2] and all major distributions rely on it. It drives mice, touchpads, tablets, keyboards, touchscreens, trackballs, etc. so basically everything except joysticks.

  • Contribute to Fedora Magazine

    Do you love Linux and open source? Do you have ideas to share, enjoy writing, or want to help run a blog with over 60k visits every week? Then you’re at the right place! Fedora Magazine is looking for contributors. This article walks you through various options of contributing and guides you through the process of becoming a contributor.

  • Fabiano Fidêncio: Libosinfo (Part I)

    Libosinfo is the operating system information database. As a project, it consists of three different parts, with the goal to provide a single place containing all the required information about an operating system in order to provision and manage it in a virtualized environment.

  • Τι κάνεις FOSSCOMM 2019

    When the students visited our Fedora booth, they were excited to take some Fedora gifts, especially the tattoo sticker. I was asking how many of them used Fedora, and most of them were using Ubuntu, Linux Mint, Kali Linux and Elementary OS. It was an opportunity to share the Fedora 30 edition and give the beginner’s guide that the Fedora community wrote in a little book. Most of them enjoyed taking photos with the Linux frame I did in Edinburgh... [...] I was planning to teach the use of the GTK library with C, Python, and Vala. However, because of the time and the preference of the attendees, we only worked with C. The workshop was supported by Alex Angelo who also traduced some of my expressions in Greek. I was flexible in using different Operating Systems such as Linux Mint, Ubuntu, Kubuntu among other distros. There were only two users that used Fedora. Almost half of the audience did not bring a laptop, and then I grouped in groups to work together. I enjoyed to see young students eager to learn, they took their own notes, and asked questions. You might see the video of the workshop that was recorded by the organizers.

  • Extending the Minimization objective

    Earlier this summer, the Fedora Council approved the first phase of the Minimization objective. Minimization looks at package dependencies and tries to minimize the footprint for a variety of use cases. The first phase resulted in the development of a feedback pipeline, a better understanding of the problem space, and some initial ideas for policy improvements.

today's howtos and programming leftovers

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