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Save and load Python data with JSON

mar, 07/16/2019 - 09:01

JSON stands for JavaScript Object Notation. This format is a popular method of storing data in key-value arrangements so it can be parsed easily later. Don’t let the name fool you, though: You can use JSON in Python—not just JavaScript—as an easy way to store data, and this article demonstrates how to get started.

First, take a look at this simple JSON snippet:


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Become a lifelong learner and succeed at work

mar, 07/16/2019 - 09:00

Continuous learning refers to the ongoing, career-driven, intentional learning process people undertake to develop themselves. For people who consider themselves continuous learners, learning never stops—and these people see learning opportunities in everyday experiences. Engaging with one's colleagues in debate, reflecting on feedback, scouring the internet for a solution to a frustrating problem, trying something new, or taking a risk are all examples of the informal learning activities one can perform on the job.


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What is POSIX? Richard Stallman explains

lun, 07/15/2019 - 09:02

What is POSIX, and why does it matter? It's a term you've likely seen in technical writing, but it often gets lost in a sea of techno-initialisms and jargon-that-ends-in-X. I emailed Dr. Richard Stallman (better known in hacker circles as RMS) to find out more about the term's origin and the concept behind it.


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Understanding software design patterns

lun, 07/15/2019 - 09:01

If you are a programmer or a student pursuing computer science or a similar discipline, sooner or later, you will encounter the term "software design pattern." According to Wikipedia, "a software design pattern is a general, reusable solution to a commonly occurring problem within a given context in software design." Here is my take on the definition: When you have been working on a coding project for a while, you often begin to think, "Huh, this seems redundant.


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What movie genre does your typical day most resemble?

lun, 07/15/2019 - 09:00

Have you ever daydreamed about what type of movie "A Day in the Life of [Your Name Here]" would be? As a sysadmin or other IT professional, your day can vary depending on what issues arise. Does your workday typically play out as planned, or does it tend to go off script? Which movie genre best describes your typical day?

Superhero blockbuster: When you save the day after Thanos deletes the world's DNS records, you might feel like one of the Avengers.


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MTTR is dead, long live CIRT

ven, 07/12/2019 - 09:02

The game is changing for the IT ops community, which means the rules of the past make less and less sense. Organizations need accurate, understandable, and actionable metrics in the right context to measure operations performance and drive critical business transformation.

The more customers use modern tools and the more variation in the types of incidents they manage, the less sense it makes to smash all those different incidents into one bucket to compute an average resolution time that will represent ops performance, which is what IT has been doing for a long time.


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Make an RGB cube with Python and Scribus

ven, 07/12/2019 - 09:01

When I decided I wanted to play with color this summer, I thought about the fact that colors are usually depicted on a color wheel. This is usually with pigment colors rather than light, and you lose any sense of the variation in color brightness or luminosity.


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Certifications for DevOps engineers

ven, 07/12/2019 - 09:00

DevOps teams appreciate using DevOps processes, especially in multi- and hybrid cloud infrastructures, for many reasons. For one thing, DevOps breaks down barriers and enables agile software development and continuous delivery of IT operations.


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What is a golden image?

jeu, 07/11/2019 - 09:02

If you’re in quality assurance, system administration, or (believe it or not) media production, you might have heard some variation of the term gold master, golden image, or master image, and so on. It’s a term that has made its way into the collective consciousness of anyone involved in creating one perfect model and then producing many duplicates from that mold. That’s what a gold master, or golden image, is: The virtual mold from which you cast your distributable models.


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How to install Elasticsearch on MacOS

jeu, 07/11/2019 - 09:01

Elasticsearch is an open source, full-text search engine developed in Java. Users upload datasets as JSON files. Then, Elasticsearch stores the original document before adding a searchable reference to the document in the cluster’s index.

Less than nine years after its creation, Elasticsearch is the most popular enterprise search engine. Elastic released its latest update—version 7.2.0 —on June 25, 2019.


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DevOps for introverted people

jeu, 07/11/2019 - 09:00

We asked members of our DevOps team to talk about their experience as introverts and to give extroverts some advice. Before we get into their responses, though, let’s first define the term.


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32-bit life support: Cross-compiling with GCC

mer, 07/10/2019 - 09:02

If you're a developer creating binary packages, like an RPM, DEB, Flatpak, or Snap, you have to compile code for a variety of different target platforms. Typical targets include 32-bit and 64-bit x86 and ARM. You could do your builds on different physical or virtual machines, but that means maintaining several systems. Instead, you can use the GNU Compiler Collection (GCC) to cross-compile, producing binaries for several different architectures from a single build machine.


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You can tinker with this conference badge

mer, 07/10/2019 - 09:01

In the beginning, there were conferences. Over time, as those conferences grew, attendees needed ways to identify each other. This need gave us the conference badge.

No one knows what the first conference badges looked like, but we can be confident that they were relatively simple affairs. Over time, paper was put into plastic sleeves, which eventually became information printed on hard plastic. Sometimes that plastic wasn’t even rectangular.


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How to teach software engineering students about the enterprise

mer, 07/10/2019 - 09:00

In this opinion article, you will find a set of suggestions for the inclusion of enterprise technology into software engineering courses. This piece goes through the difficulties that students face and proposes simplifications successfully used in the past. The continual advancement of enterprise technologies leads to a simplifying of the inclusion process in education.


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From BASIC to Ruby: Life lessons from first programming languages on Command Line Heroes

mar, 07/09/2019 - 09:03

The second episode of this Command Line Heroes season 3 drops today and it sent me back through a nostalgic look at the idea of first programming languages.


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How to install Elasticsearch and Kibana on Linux

mar, 07/09/2019 - 09:02

I set about installing Elasticsearch on Linux. The process is very different than it is on a Mac but is outlined in detail on the Elasticsearch website. However, the official instructions have a lot more detail than is necessary if you intend to follow along with Lauren’s series as I do, so this article takes a simplified approach.


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Sysadmin vs SRE: What's the difference?

mar, 07/09/2019 - 09:01

In the IT world, there has always been a pull between generalist and specialist. The stereotypical sysadmin falls in the generalist category 99 times out of 100. The site reliability engineer (SRE) role is specialized, however, and grew out of the needs of one of the first companies to know real scale: Google. Ultimately, these two roles have the same goal for the applications whose infrastructure they operate: providing a good experience for the applications’ consumers.


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Open education: There isn't an app for that

mar, 07/09/2019 - 09:00

In 2010, I confronted a problem common to all public school leaders: How do we optimize our limited funding to bring powerful learning technology to thousands of students? Faced with an end-of-life fleet of student laptops, district-wide budget cuts, and teachers pleading for more technology, I made a small bet that open source software could be an affordable path forward.


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10 ways to get started with Linux

lun, 07/08/2019 - 09:02

The article What is a Linux user? by Anderson Silva made it clear that these days people are as likely to use Linux (in some way) as they are to use Windows, as long as your definition of "using Linux" is sufficiently broad. Still, if you don't have enough Linux in your life, now is a great time to try Linux in a way you've never tried before.

Here are 10 ways to get started with Linux. Try one or try them all.

1. Join a free shell


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The case for making the transition from sysadmin to DevOps engineer

lun, 07/08/2019 - 09:01

The year is 2019, and DevOps is the hot topic. The day of the system administrator (sysadmin) has gone the way of mainframes if you will—but really, has it? The landscape has shifted as it so often does in technology. There is now this thing called DevOps, which can’t exist without Ops.


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