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today's 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 .

Scorewriter MuseScore 3.6 Released with New Fonts, Improvements

MuseScore, free open-source sheet music player and editor, released the new major version 3.6 with many new features, improvements and bug-fixes. Read more

Android Leftovers

12 Useful Free and Open Source Git Tools

Git is an open source distributed version control system which was originally designed by Linus Torvalds, the creator of Linux, in 2005 for Linux kernel development. This control system is widely used by the open source community, handling small to extremely large projects with an emphasis on speed and efficiency, but maintaining flexibility, scalability, and guaranteeing data integrity. Git is one of a number of open source revision control systems available for Linux. Git is frequently regarded by many developers to be the finest version control tool available. Most Linux distributions offer lots of secondary tools that add additional functionality. Like many things in Linux, the choice can be bamboozling. This article seeks to help identify tools which we’ve found to be very useful. They should be a good addition to maximise the benefits of using Git. Read more