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Joyent Defends Docker, Adding Closer Ties

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OSS

Following a tumultuos two days in the Docker community, Joyent has announced two open source initiatives and a container service that further its ties to Docker. With the news, Joyent CTO Bryan Cantrill also has some choice remarks about CoreOS “full-frontal assault” on Docker. First, there is the sheer brazenness of the remarks, but also reflects something that could have been predicted.

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Selling a Non-Product: The Multifaceted OpenStack

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Web

"The reality is that OpenStack is not a product. It is a set of open source tools that rely on many other open source tools to populate function. There is no one thing that you can download and say you have OpenStack up and running," said Jesse Proudman, founder and CTO of Blue Box, and one of the seven panel participants at the summit.

OpenStack is an open source, private cloud alternative to Amazon Web Services and other public cloud platforms. The software controls compute, storage and networking resources throughout a data center. It is managed through a dashboard, command line or via the OpenStack API.

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Docker: Sorry, you're just going to have to learn about it. Today we begin

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OSS

Containers aren't a new idea, and Docker isn't remotely the only company working on productising containers. It is, however, the one that has captured hearts and minds.

Docker started out with the standard LXC containers that are part of virtually every Linux distribution out there, but eventually transitioned to libcontainer, its own creation. Normally, nobody would have cared about libcontainer, but as we'll dig into later, it was exactly the right move at the right time.

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Open source projects that warrant data center managers' attention

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When you're making the case to a data center manager about tech that is worthy of her consideration, make sure these three open source options are on your list.

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Fedora 21 Innovates in Docker Cloud Virtualization with Project Atomic

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Red Hat
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Docker, OpenStack, EC2 and "Project Atomic" are among the leading buzzwords for Fedora Linux 21, the upcoming release of the community-developed open source operating system that serves as the basis for Red Hat's enterprise Linux platforms. Due out next month, the release is now receiving its final tweaks from developers, who have revealed further details on the cloud and virtualization innovations in the new version.

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QEMU 2.2-rc3 Released, Final Release Pushed Back By Couple Days

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Linux
Server

QEMU 2.2-rc3 was released today but there's still a few release-critical bugs that will warrant an unscheduled release candidate and thus push back the official QEMU 2.2 version, hopefully only by a few days.

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Docker Update Fixes Pair of Critical Security flaws

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The open-source Docker container virtualization technology has emerged as one of the hottest and most hyped technologies of the year. Docker, however, isn't immune from security vulnerabilities, as a pair of recent updates illustrate.

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Linux admins: It's time to relearn the art of compiling apps

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GNU
Linux
Server

It used to be that open source software was released only as source code and had to be compiled wherever it was needed. Obviously, that's changed. Today, some will even tell you that compiling source is an improper and problematic way to install software. Tomorrow, it may become more standard than they think.

While compiling source is still the basis of many BSDs (though you can get binary packages easily enough), package management came to Linux early on with RPM and branched out everywhere ever since. Package support on Debian and Ubuntu is simply massive. Fedora has a huge number of packages, as do RHEL and CentOS, though the packages available for the latter are generally far older for legacy and stability reasons.

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Contain yourself: The layman's guide to Docker

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Linux
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Welcome to the age of containerization, where an ecosystem led by startup Docker is leading IT organizations to ineffable peaks of efficiency, helping them scale their workloads ever-higher, and probably baking them a nice cake to boot (it's my birthday, I have cake on the brain, sue me). Microsoft, Google and Amazon Web Services are all tripping over themselves to make sure prospective customers know that their clouds are the place to be if you want to get the most from Docker.

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SDN in action: Hands-on with Cumulus Linux

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Linux
Server

The stage is set for SDN (software-defined networking) to change the way we push data through our infrastructures, with the promises of more agile network provisioning and management, as well as more affordable network hardware. But for many, the SDN concept is still amorphous. What does SDN look like in practice?

To shed light on this question, I sat down with a few Dell Networking S6000 switches running Cumulus Linux 2.3. There are many approaches to an SDN solution, but one of the most significant is the advent of white-box switches and à la carte switch firmware. This is the essence of the solution offered by Cumulus Networks.

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Android Leftovers

Devices/Embedded: MiTAC, Raspberry Pi and ESP32/Arduino

  • Fanless Linux embedded system makes a compact IoT gateway

    ICP Germany has recently introduced the MiTAC ME1-8MD series family of compact, fanless Linux embedded systems powered by NXP i.MX 8M processor and designed to be used as IoT gateways, data acquisition and processing systems, and mini servers. Three models have been launched with a choice of dual or quad-core processors, up to 4GB LPDDR4 RAM, and 32GB eMMC flash storage. The embedded computers also come with up to two Ethernet ports, support up to two displays, and include an internal Raspberry Pi compatible 40 pin GPIO header.

  • Official Raspberry Pi 4 case fan adds cooling to Raspberry Pi 4 case

    When the Raspberry Pi Foundation first introduced the Raspberry Pi 4, they claimed the board would work just fine under most cases without a heatsink, and the latter was only really needed under load. That may have been true when using the board in a temperate climate like in the United Kingdom, but then Raspberry Pi 4 met Thailand with some benchmarks results lower than on a Raspberry Pi 3. People using plastic enclosures had even more troubles. It’s only when I installed a heatsink on Raspberry Pi 4 that the board could really shine. The company also provided some firmware optimizations later on to further cool-down the board. But you can only do much with software, and many third-party cooling solutions such as fansinks or metal cases have been introduced for the popular SBC.

  • Pi-oT 2 IoT module adds 24V digital inputs, RS-485, and UPS to Raspberry Pi (Crowdfunding)

    Pi-oT was launched last year as a Raspberry Pi add-ons designed for commercial and industrial IoT automation. It features 5V I/Os, relays, and ADC inputs suitable for light-duty projects and prototyping. The company, called Edge Devices, has now launched an update with Pi-oT 2 adding optional support for 24V digital inputs, RS-485, and an uninterruptible power supply (UPS).

  • M5Paper ESP32 IoT development kit features a 4.7-inch e-Ink touchscreen display

    M5Stack has just launched its unique and latest core device with a touchscreen e-Ink display. M5Paper ESP32 IoT Development Kit is a fully programmable microcontroller-based platform that can be an ideal choice for your IoT applications. This low-power device could suit such purposes as an industrial controller or smart weather display.

today's howtos

  • Enable Timestamp For History Command In Fish Shell - OSTechNix

    Whenever a command is entered in the terminal, it will be saved at the end of the history file in Linux. You can easily retrieve these commands at any time using history command. The shell is also tracking the timestamp of all command entries, so that we can easily find when a specific command is executed. We already have shown you how to enable timestamp in Bash and Zsh shells. Today we will see how to enable timestamp for history command in Fish shell in Linux. In addition, we will also learn how to create a simple function to show the date and time stamps in history command output in fish shell.

  • Linux: How To Encrypt And Decrypt Files With A Password
  • How to convert pdf to image on Linux command line - nixCraft

    I have many PDF files, and I need to convert them to a png file format, add a border to those images, and convert back all those images to pdf format. How can I convert pdf to image format on Linux and vice versa using the CLI?

  • How To Install PHP 8 on Ubuntu 20.04 LTS - idroot

    In this tutorial, we will show you how to install PHP 8 on Ubuntu 20.04 LTS. For those of you who didn’t know, PHP (recursive acronym for PHP: Hypertext Preprocessor) is a popular server scripting language known for creating dynamic and interactive Web pages. PHP is a widely-used programming language on the Web. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you through the step by step installation of PHP 8 on Ubuntu 20.04 (Focal Fossa). You can follow the same instructions for Ubuntu 18.04, 16.04, and any other Debian based distribution like Linux Mint.

  • How to Restrict WordPress Site Access - Anto Online

    A lot of the time, you need to restrict access to various users on your website. Whether you’re cordoning premium content, sensitive pages, or content targeted to specific individuals, there are various ways you can restrict user access easily and effectively on your WordPress website. The easiest method is using plugins that you can just download and link with your website. If you have coding skills, you can also edit various functions to achieve the same thing. We shall also take a look at how you can restrict site managers with various levels of access. Whatever kind of site restrictions you need to accomplish, stick with us and we will help you do it.

Linux Kernel: Greg Kroah-Hartman's Talk and Panics

  • Greg Kroah-Hartman: Lessons for Developers from 20 Years of Linux Kernel Work [Ed: "The Linux Foundation is a sponsor of The New Stack" for the latter to write puff pieces such as these, so it's basically marketing]
  • Greg Kroah-Hartman: 'Don't Make Users Mad'

    Kroah-Hartman explains that one of Linus Torvalds' most deeply-held convictions: don't break userspace. "Other operating systems have this rule as well — it's a very solid rule — because we always want you to upgrade. And we want you to upgrade without worrying about it. We don't want you to feel scared. If you see a new release, and we say, 'Hey, this fixes a bunch of problems,' we don't want you to feel worried about taking that. That's really really important — especially with security...." If you do make a change, make sure there truly is a compelling reason. "You have to provide enough reason and enough goodness to force somebody to take the time to learn to do something else. That's very rare." His example of this was systemd, which unified a variety of service configurations and initialization processes. "They did it right. They provided all the functionality, they solved a real problem that was there. They unified all these existing tools and problems in such a way that it was just so much better to use, and it provided enough impetus that everybody was willing to do the work to modify their own stuff and move to the new model. It worked. People still complain about it, but it worked. Everybody switched... It works well. It solves a real problem. "That was an example of how you can provide a compelling reason to move on — and make the change."

  • What to do in case of a Linux kernel panic

    Linux is used everywhere in the IT world. You've probably used Linux today, even if you didn't realize it. If you have learned anything about Linux, then you know it is indeed a kernel. The kernel is the primary unit of the Linux operating system (OS) and is responsible for communications between a computer's hardware and its processes. In this article, you will learn about one situation related to the Linux kernel: The kernel panic. The term itself can make you panic, but if you have the proper knowledge, then you can remain calm. Every system admin faces this issue at least once in their career, but reinstalling the system is not the first solution you should turn to. [...] Now, anytime you see a kernel panic error, you will definitely not panic because you know why this error occurred and how to resolve it. This article covers one of the common Linux boot problems: kernel panic. There are so many other potential boot problems that can occur in Linux, but resolving those issues will become much less of a panic when you gain some advanced knowledge of your system.