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today's howtos

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HowTos
  • Wildcards in Linux explained with 10 examples | FOSS Linux

    Wildcards, a.k.a. meta characters, are a godsend when it comes to searching for particular filenames from a heap of similarly named files. For example, by using Wildcards in Linux, you can use the ls command, rm command, or any other Linux command for that matter, on multiple files as long as they match the defined criteria.

  • Set Raspberry PI Swap Memory - peppe8o

    Beside CPU, RAM is the most valuable resource in every computer. It is where data are stored for running programs and it is one the most important resource for applications managing a big amount of data. Raspberry PI Swap Memory, like other linux systems, can reduce small RAM impact avoiding Out of Memory errors

  • Install and Configure a Multi-Master HA Kubernetes Cluster with kubeadm, HAProxy and Keepalived on CentOS 7

    The kubeadm tool is great if you need a simple way to deploy Kubernetes, and integrate it into provisioning systems such as Ansible. I use Ansible a lot nowadays, but before I got to the point of automating my Kubernetes homelab, I had to do it by hand. You can’t automate what you don’t understand.

    As we will be deploying three Kubernetes control plane nodes, we need to deploy a kube-apiserver load balancer in front of them. The load balancer distributes traffic to all healthy control plane nodes in its target list. HAProxy is my homelab load balancer of choice, and we will configure it with Keepalived to provide node redundancy. If one of the HAProxy servers becomes unavailable, the other one will serve traffic.

    We will use three KVM hosts to deploy resources. The goal is to sustain data and maintain service in the event of a loss of a (single) hypervisor host.

  • How to Find a Directory in Linux

    Looking for a specific directory in your Linux file system? Fortunately, you have many search tools at your disposal. We'll look at several easy-to-use options, and how to use them to search for folders efficiently.

  • How to Install and Use Terraform on Ubuntu 20.04 - LinuxBuz

    Terraform is an open-source software tool created by Hashicorp. It is used to automate and manage your infrastructure, your platform and services that run on that platform. It uses a declarative language that means you don't have to define every step of how this automation and management is done. With Terraform, you can create a VPS, AWS users and permissions, spin up servers and install the application on servers.

  • Transition from Thunderbird to Mutt

    I was going OK with Thunderbird and enigmail(though it have many problems). Normally I go through changelogs before updating packages and rarely do a complete upgrage of my machine. Couple of days ago I did a complete upgrade of system which updated my Thunderbird to latest version and throwing of enigmail plugin for using their native openPGP support. There is a blog from Mozilla which I should’ve read earlier. Thunderbird’s builtin openPGP functionality is still in experimental, atleast not ready for my workflow. I could’ve downgrade to version 68. But I chose to move to my secondary MUA, mutt. I was using mutt for emails and newsletters that I check twice in a year a so.

    So I started configuring mutt to handle my big mailboxes. It took three evenings to configure mutt to my workflow. Though the basic setup can be done in less than an hour it is the small nitpicks consumed much of my time. Currently I have isync to pull and keep mails offline. Mutt to read, msmtp to send, abook as the email address book and urlview to see the links in mail. I am still learning notmuch and virtual mailbox ways to filter.

  • Setting up Tomcat 9.0.41 && mariadb-server 10.5 on Debian Bullseye/sid

    Setup Tomcat via original tar.gz ball and JDK 11 allow to deploy "war" archive been built for Web Servlet Application from http://lxer.com/module/newswire/view/295844/index.html . Thus CRUD Server side Java Apps might be moved on Debian Bullseye/sid in 3-5 minutes .

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openSUSE Leap 15.3 Released for Public Beta Testing, Download Now

openSUSE Leap is openSUSE’s regular release that follows the development cycle of the SUSE Linux Enterprise operating system. As such, openSUSE Leap 15.3 beta comes with packages from the SUSE Linux Enterprise (SLE) 15 Service Pack 3 (SP3) release, including the Linux 5.3 kernel. This kernel version is maintained by SUSE and introduces support for AMD Navi GPUs, new IPv4 addresses, RISC-V improvements, and compatibility with the Intel SST (Speed Select Technology) used in Intel Xeon servers. Read more

openSUSE Leap 15.3 Reaches Beta Build Phase

openSUSE Leap has entered into the beta release phase today for its 15.3 minor version. This openSUSE Leap 15.3 version is a solidified release that focuses more on the building of the distribution rather than refreshing the distribution?s packages, but there are some significant changes to the distribution. Many of the packages will remain the same as those in openSUSE Leap 15.2 with a bit of hardware enablement and security backports. An updated version of glibc brings some Power10 support and the Xfce desktop users will have the new 4.16 version. The distribution also gains adds s390x architecture. The biggest change for this release is how Leap is built and its relationship with SUSE Linux Enterprise. Leap transitioned to a new way of building openSUSE Leap releases in the fall of 2020 through a prototype project called Jump. The Jump prototype was used as a proof of concept, but no longer exists; it did prove to work at building a distribution and bringing the code streams of both openSUSE Leap and SLE closer together. The proof of concept was implemented for building the release of openSUSE Leap 15.3 as seen in the beta release today. Building Leap on top of binary packages from SLE, which was part of the rationale for the Jump prototype, allows for easy development on a community release to be put into production on an enterprise release should the need arise. Read more Also: openSUSE Leap 15.3 Beta Begins - Phoronix

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