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IBM/Red Hat/Fedora Leftovers

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Red Hat
  • PAM by example: Use authconfig to modify PAM
  • Learning NFS through server and client configuration
  • World domination with cgroups part 8: down and dirty with cgroup v2

    Thanks for joining me again as we continue to look at cgroup v2, which became available with Red Hat Enterprise Linux 8. This time around, I’d like to take a very deep look at the virtual file system used to control the cgroup controllers and the special files inside. Understanding this will be necessary for doing custom work that used to be the domain of libcgroup (first introduced in RHEL 6, and not recommended for use in RHEL 8). We’re also going to try some fun with cpusets, which are now fully working with RHEL and systemd for the first time ever!

  • Build secure applications with OpenShift 4.3 on public cloud

    Building secure applications that ensure data privacy and security when deployed to a cloud environment is crucial for businesses that collect customer data, particularly for regulated industries like finance, retail, banking, and others. In this article, I introduce you to an example credit card application my team built to explore and share approaches for creating secure cloud-based applications with OpenShift 4.3 on IBM Cloud.

    We built the example credit card application with just a few straight-forward microservices that record dynamic user transactions in a PostgreSQL database. The JavaScript simulator application presents a Web-based view of a mobile application run by a Node.js service running inside an OpenShift cluster.

  • Ben Williams: F32-20200804 updated Live isos Released

    The Fedora Respins SIG is pleased to announce the latest release of Updated F32-20200804-Live ISOs, carrying the 5.7.11-200 kernel.

    This set of updated isos will save considerable amounts of updates after install. ((for new installs.)(New installs of Workstation have about 900+MB of updates)).

    A huge thank you goes out to irc nicks dowdle, dbristow, Southern-Gentleman for testing these iso.

  • Dan Williams: Kubernetes Watches will ghost you without warning

    Alternate title: if you’re ahead of Clayton you’re doing well, at least for a few hours.

    [...]

    Watches can and do terminate at any time, gracefully or not. Sometimes a new apiserver leader is elected and the old one terminates watches and clients must reconnect to the new leader. Sometimes the leader just goes away because its node got rebooted. Sometimes there’s a network hiccup and the HTTP connection backing the watch times out. Regardless of the cause, they happen and your code needs to handle them. OpenShift CI forces frequent leader elections to specifically catch these issues before they get to customers.

    A watch stuffs events into a Go channel. The code using the watch reads events out of the channel, usually in a for loop (to continuously grab events) with a select block (to ensure individual read operations don’t block which enables cancelation when the channel returned by ctx.Done() is closed). Reading from a Go channel (case event := <-pvcWatch.ResultChan()) returns an optional second boolean indicating whether the channel has been closed.

    The testcase loop doesn’t exit until either the testcase times out and the ctx.Done() channel is closed, one of the event handler cases fails the testcase, or the PersistentVolumeClaim is deleted. So what happens if the Watch is closed unexpectedly and nothing checks whether the channel is closed?

  • Copr: EOL Copr APIv1 and APIv2

    During Copr history, we got three APIs. For a long time, we maintained all versions.

    We decided that it is time to remove the old versions. We are going to start with APiv1.

  • Red Hat Virtualization 4.4 To Be Generally Available This Week

    Red Hat has announced that Red Hat Virtualization 4.4, the latest update to its virtualization solution for traditional virtual machine (VM)-based workloads, will be generally available this week.

    With this latest release, Red Hat Virtualization is now rebased to Red Hat Enterprise Linux 8.2. It is said to offer a more seamless integration with Red Hat OpenShift, providing a solution that can launch the next-generation of cloud-native applications while providing a foundation for VMs today.

    “Based on RHEL 8.2, Red Hat Virtualization 4.4 inherits all of the stability, performance and security improvements that you trust for your most business critical workloads while adding new capabilities that make it even easier to manage a large virtual environment,” the company said.

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. 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 the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.