Open Hardware: Raspberry Pi, Arduino, Thomas Petazzoni (Bootlin) on Training

• Qsync fixed on the Pi4 and FF compiled

  The Raspberry Pi4 does not have a hardware battery-backed clock, so relies on getting the date and time from an Internet time server. In EasyOS, Qsync is the utility that does that. At first bootup, QuickSetup has a checkbox to enable getting time from the Internet, which will launch Qsync. At first bootup on the Pi4, if you are going to connect to Internet via wifi, not ethernet, then there won't be an immediate Internet access. No problem, Qsync will run once the Internet connection is established. Qsync will run just once at bootup and after Internet connection. That's fine, but I couldn't understand why it would suddenly stop working. Then discovered that /etc/init.d/qsync was getting its executable-flag cleared.

• Arduino Blog » This children’s console looks like something straight out of a superhero’s lair

  Kids have wonderful imaginations, and to help students at a primary school have a super time, creator “palladin” was asked to construct a console for them to use. The device features a variety of lights and sci-fi additions, including glowing “reactor” tubes that diffuse light using hair gel and a “memory bank” that emits flashing patterns for a 1950s supercomputer look.

• Arduino Blog » This pen plotter draws detailed maps the size of walls

  Christopher Getschmann wanted a wall-sized map of the world. He soon realized, however, that it’s tough to actually buy such a map that’s both beautiful and detailed enough to satisfy his cartographic tastes. While many would simply move on to the next “thing,” Getschmann instead took things into his own hands, and built a pen plotter specifically to draw massive 2×3 meter map for his wall.

• New training course: embedded Linux boot time optimization

  For many embedded products, the issue of how much time it takes from power-on to the application being fully usable by the end-user is an important challenge. Bootlin has been providing its expertise and experience in this area to its customers for many years through numerous boot time optimization projects, and we have shared this knowledge through a number of talks at several conferences over the past years. We are now happy to announce that we have a new training course Embedded Linux boot time optimization, open for public registration. This training course was already given to selected Bootlin customers and is now available for everyone.

Red Hat/Fedora Leftovers

 

• A brief introduction to Ansible roles for Linux system administration

  In this part one of two articles, learn to use rhel-system-roles with your Ansible deployment to better manage functionality such as network, firewall, SELinux, and more on your Red Hat Enterprise Linux servers.

 

• From Docker Compose to Kubernetes with Podman | Enable Sysadmin

  Use Podman 3.0 to convert Docker Compose YAML to a format Podman recognizes.

 

• Fedora Community Blog: Software Management (RPM, DNF) 2020 retrospective

  On behalf of the RPM and DNF teams, I would like to highlight changes that have appeared in our packages in 2020. Thanks everyone for your bug reports and patches!

  

• Application and data resiliency for Kubernetes

  Using tools like Red Hat OpenShift and Red Hat OpenShift Container Storage, organizations are developing and deploying more stateful applications and microservices at an accelerating pace. According to a recent Enterprise Strategy Group (ESG) research study, 41% of companies currently use containers for production applications. Another 33% use containers for dev/test and pre-production only but plan to use containers for production applications in the next 12 months.

• Red Hat Introduces Data Resilience for Enterprise Kubernetes Applications

  Red Hat, Inc., the world's leading provider of open source solutions, today introduced new data resilience capabilities for cloud-native workloads with the release of Red Hat OpenShift Container Storage 4.6. This offering from Red Hat Data Services enables customers to extend their existing data protection solutions and infrastructure to enhance data resilience for cloud-native workloads across hybrid and multicloud environments.

 

• Why Red Hat killed CentOS—a CentOS board member speaks

  This morning, The Register's Tim Anderson published excerpts of an interview with the CentOS project's Brian Exelbierd. Exelbierd is a member of the CentOS board and its official liaison with Red Hat. Exelbierd spoke to Anderson to give an insider's perspective on Red Hat's effective termination of CentOS Linux in December, in which the open source giant announced CentOS Linux was to be deprecated immediately—with security upgrades to CentOS Linux 8 ending later in 2021 rather than the 2029 end of support date CentOS users expected.

Zentyal Server 7.0 Development Now Available

Zentyal Development Team today announced the availability of Zentyal Server Development Edition 7.0. This is a new major community release of the Zentyal Linux Server, based on Ubuntu Server 20.04 LTS. This version comes with the most recent versions of all the integrated software, including Samba 4.11 and the latest stable SOGo version. Zentyal Server provides an easy-to-use Linux alternative to Windows Server®. Thanks to the integration of Samba, Zentyal provides native compatibility with the Microsoft Active Directory® and allows transparent management of Windows® clients. It is used by companies and public administrations mainly as a domain and directory server and a file server. The graphical user inferface that Zentyal offers helps to make Linux server management easier for all and specially for new Linux users.

today's howtos

• Linux: Delete file & folder using command line terminal - Linux Shout

  As we know Linux is slightly different from Windows for various tasks even in deleting files and folders. And here we will see the quick Linux commands to delete a file and directory using the terminal. However, just like in Windows, system files or the important folders are only accessible by admin, in Linux, they are under sudo or root users. Therefore, if want to delete any system file on Linux using GUI, then you should log in as root but that is a bit risky because you don’t want to run all your applications under an admin user.

• Automate setup and delivery for virtual machines in the cloud | Opensource.com

  If you're a developer or hobbyist using a Fedora qcow2 image for the cloud, you always have to do a bunch of initial configuration before an image is ready to use. I know this all too well, and I was eager to find a way to make the setup process simpler. As it happens, the entire Fedora quality assurance team feels the same way, so we developed Testcloud.

• How to Run a Shell Script in Linux [Essentials Explained]

  Using #! /bin/bash indicates that the script is bash shell script and should be run with bash as interpreter irrespective of the shell which is being used on the system. If you are using zsh specific syntax, you can indicate that it is zsh script by adding #! /bin/zsh as the first line of the script.

• Simple guide to secure Redis Installation - The Linux GURUS

  In our previous tutorial, we learned how we can install Redis on the Ubuntu server & CentOS/RHEL server. But if we leave the installed Redis service to default state i.e. with default configurations, it might be susceptible to intrusions. So we should know how we can secure the Redis installation to avoid unauthorized access or operations on our Redis server. There are a number of things we can do to secure the Redis installation. We will now list them down one by one.

• Running syslog-ng in Bastille – revisited

  Bastille is a container management system for FreeBSD, similar to Docker or Podman on Linux. The historical name of containers on FreeBSD is jail, and they appeared a lot earlier than containers on Linux. Managing jails was not always easy. When I started to use this technology in production in 2001, nothing was automated. Using Bastille, you can easily create, configure, or update jails at scale. It has a template system to install applications in containers and there is a template also for syslog-ng.

• Oracle Linux Virtualization Manager: Administration and Deployment made easy with short training videos

  In this week's Training Tuesday blog we will begin with the first in a series of blogs about Oracle Linux Virtualization Manager training videos. Each blog provides pointers to free, short videos that you can take at your own pace to get a better at understanding of the product. Oracle Linux Virtualization Manager is a server virtualization management platform, based on the oVirt open source project, that can be easily deployed to configure, monitor, and manage an Oracle Linux Kernel-based Virtual Machine (KVM) environment with enterprise-grade performance and support from Oracle. This environment also includes management, cloud native computing tools, and the operating system, delivering leading performance and security for hybrid and multi-cloud deployments.