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Kubernetes is the de facto leader in container orchestration on the market, and it is an amazingly configurable and powerful orchestration tool. As with many powerful tools, it can be somewhat confusing at first. read more

Some people say Linux distributions no longer matter with containers. Alternative approaches, like distroless and scratch containers, seem to be all the rage. It appears we are considering and making technology decisions based more on fashion sense and immediate emotional gratification than thinking through the secondary effects of our choices. We should be asking questions like: How will these choices affect maintenance six months down the road? What are the engineering tradeoffs? How does this paradigm shift affect our build systems at scale? read more

News briefs for February 20, 2019.

by Mitch Frazier   I have a computer in my bedroom. I also have cats. Unfortunately, cats and screen lockers don't mix well, particularly at night. To be accurate, it's more a problem with the display power management than the actual screen locking. Here's the way it works: I run a script to "shut the lights off at night" (that is, lock the screen and force the display to power down), and that works great, until one of the cats jumps on the desk and causes the mouse to move and turn the display back on. And the cats don't even have to touch the mouse; the slight movement of the desk is enough to cause the mouse to react. Recently, I'd had enough of it and figured there had to be a way to disable the mouse and "refactor" the script.

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In this tutorial, we will show you how to set up Kerberos authentication between two Ubuntu 18.04 servers. We will install and configure the Kerberos server on the Ubuntu server and then install the Kerberos client on the other. Finally, we will test the authentication of the SSH service with the Kerberos server.

Infrastructure monitoring is an integral part of infrastructure management. It is an IT manager's first line of defense against surprise downtime. Severe issues can inject considerable downtime to live infrastructure, sometimes causing heavy loss of money and material. Monitoring collects time-series data from your infrastructure so it can be analyzed to predict upcoming issues with the infrastructure and its underlying components. This gives the IT manager or support staff time to prepare and apply a resolution before a problem occurs. A good monitoring system provides: read more

Every day there seems to be a security breach reported in the news where our data is at risk. Despite the fact that SSH is a secure way to connect remotely to a system, you can still make it even more secure. This article will show you how. That’s where two-factor authentication (2FA) comes in. […]

Berners-Lee's WorldWideWeb code can't handle much, but hey, it now runs in a browser In preparation for next month's 30th anniversary of the proposal that gave us the world wide web, boffins at the behest of CERN have recreated the world's first web browser, and made it accessible as a modern web page.…

Cachet is a beautiful and powerful open source status page system written in PHP that allows you to better communicate downtime and system failures to your customers, teams, and shareholders.

When you think of the word wiki, chances are the first thing that comes to mind is Wikipedia. That's not a surprise, considering that Wikipedia did help put the concept of the wiki into the popular consciousness. Wikis, which are websites you can edit, are great tools for collaborating and organizing. But wikis usually require a lot of digital plumbing and a bit of care to use and maintain. All of that's overkill for personal use. read more

If you've ever wondered how your Linux computer stacks up against other Linux, Windows, and MacOS machines or searched for reviews of Linux-compatible hardware, you're probably familiar with Phoronix. read more

In the previous two tutorials, we discussed the basics of variables including how they occupy memory. But we mainly focused on integers and floats. In this tutorial, we will discuss about characters (or char type variables).

News briefs for February 19, 2019.

There are a lot of great open source tools out there for storing secrets in Git. It can be hard to determine the right one for you and your organization—it depends on your use cases and requirements. To help you compare and choose, we'll look at four of the most popular open source tools for secrets management and see how they stack up against each other: read more

Who do you think you are? Paris-based code botherer CAST Software said today it would buddy up with Software Heritage to tackle the sometimes tricky task of identifying the provenance of open-source code in modern projects.…

If you are at all familiar with binary operations, you will have heard of AND and OR. These are bitwise operations that operate on individual bits of a binary number. In Bash, you use & as the AND operator and | as the OR operator:

I'm lucky to work with a team of impressive students at Duke University who are leaders in their classrooms and beyond. As members of CSbyUs, a non-profit and student-run organization based at Duke, we connect university students to middle school students, mostly from title I schools across North Carolina's Research Triangle Park. Our mission is to fuel future change agents from under-resourced learning environments by fostering critical technology skills for thriving in the digital age. read more

Free software will save psychology from the Replication Crisis. Psychology changed forever on the August 27, 2015. For the previous four years, the 270 psychologists of the Open Science Collaboration had been quietly re-running 100 published psychology experiments. Now, finally, they were ready to share their findings. The results were shocking. Less than half of the re-run experiments had worked.

I always say you don't need to use the command line to use Linux effectively—I know many Linux users who never crack open a terminal window and are quite happy. However, even though I don't consider myself a techie, I spend about 20% of my computing time at the command line, manipulating files, processing text, and using utilities. One thing I often do in a terminal window is viewing files, whether text or word processor files. Sometimes it's just easier to use a command line utility than to fire up a text editor or a word processor. read more

Estone is launching an “EMB-2238” Pico-ITX board for audio and voice control applications that runs Linux on an i.MX8M and offers a dual-DSP audio hub and DAC, 40-pin GPIO, and optional PoE and second GbE. Toledo, Ohio based Estone Technology (known for its former Habey brand) offers a variety of Linux-friendly Pico-ITX boards, including boards […]