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today's howtos

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  • Moving away from Google services, 8 years in

    This blog post covers how I migrated away from a dozen Google services to privacy-friendly (and sometimes self-hosted) services instead. Let’s go over those one-by-one and see how they all work (and how you can set them up yourself) Hint: it’s quite fun.

  • Let’s Talk OpenZFS Snapshot

    If you’re already using snapshots and aren’t an aggressive snapshot pruner, you’ve probably wondered: How many snapshots is too many? Since there’s no such thing as infinite storage capacity, your available disk space is an obvious limiting factor. But at what point will snapshots result in a performance hit? Unlike other filesystems, the existence of one or one thousand snapshots has no impact on the performance of the filesystem, reading and writing files performs the same either way. However, the performance of administrative operations, like listing and deleting snapshots, are impacted by the number of snapshots that exist in each dataset. Is it OK to have hundreds of snapshots? Assuming sufficient storage capacity, what about having thousands or tens of thousands of snapshots? In our experience, over 1000 snapshots per dataset starts to cause significant performance issues when listing, creating, replicating, and destroying snapshots. The performance impact is not related to the total number of snapshots on the system, but the snapshots on each dataset. A hundred datasets each with one hundred snapshots will see no performance impact on listing, while a single dataset with 2000 snapshots may take many seconds to return the list of snapshots. While you may never need to store that many snapshots, you still want to get the most value for the space snapshots consume over time.

  • Studying the impact of being on Hacker News first page

    I don't have much more data than this, but it's already interesting to see the insane traffic drag and audience that Hacker News can generate. Having a static website and enough bandwidth didn't made it hard to absorb the load, but if you have a dynamic website running code, you could be worried to be featured on Hacker News which would certainly trigger a denial of service.

  • How to use Lynis Linux Security Audit Tool on Ubuntu – VITUX

    Lynis is an open-source security auditing tool for extensive scanning of systems and its security defense to achieve compliance testing and system hardening. This software has been distributed under a GPL license since 2004. It assists in server hardening guidelines, software patch management, fully automatic auditing, Actually lynis doesn’t harden the server by itself but it will provide information about the vulnerability and suggest a different way to harden the software.

  • How to Use Apache JMeter to Load Test Web Applications - LinuxBabe

    Apache JMeter is an open-source load testing tool, available for Linux, macOS, and Windows. In a previous tutorial, we explained how to use Netdata to monitor the performance of Apache/Nginx web servers. Apache JMeter is a great complementary tool for testing your website performance under various load scenarios.

  • How to Install and Configure DHCP Server on Ubuntu 20.04

    If you are a system administrator and working in a large environment then you may often need to set up a new client system and assign IP addresses and other network-related information manually. It is a very time-consuming process for you. This is the case, where DHCP comes into the picture.

    DHCP also known as a "Dynamic Host Configuration Protocol" is a service that can be used to dynamically assigns unique IP addresses and other information to client systems. You can assign the IP address, domain name, hostname, default gateway, and DNS server using the DHCP service.

    In this post, we will show you how to install the DHCP Server and Client on Ubuntu 20.04 server.

  • How to Install LEMP WordPress Ubuntu and Debian With Virtualhost - Unixcop

    LEMP is the acronym for Linux, Nginx, MySQL, and PHP. This tutorial is to host WordPress on the LEMP stack.

  • How to Install KVM/QEMU on Manjaro/Archlinux

    KVM is an acronym of Kernel-based Virtual Machine, it is a technology solution for virtualization based on the Linux kernel module. KVM is an open-source software solution running on the Linux x86 machine with the support of hardware virtualization extensions Intel VT or AMD-V. The KVM kernel module has been shipped to Linux kernel since version 2.6.20 and has been ported to other operating systems such as FreeBSD and Illumos as a loadable kernel modules.

    The KVM technology will turn the Linux machine into hypervisor virtualization, which is called the host machine. On the host machine, you will be able to create multiple isolated systems called virtual machines (VM). Each virtual machine has its system (it can be Linux, Windows, or BSD), also has private virtualized hardware such as memory, CPUs, network card, disk, graphic, etc.

  • Guides and Snaps Use | Inkscape

    This is the sixth part of Inkscape for Students the series. After previously we learn Drawing and Coloring, now we will learn about drawing once again but with guide lines and snapping mainly to help us place objects and make copies of them tidily. Let's exercise!

  • 3 Useful Tips on How to Use History Command in Linux

    You must aware of using the up and down arrow keys to scroll through the list of executed commands in your Bash history, but do you realize that there’s plenty more to Bash history than simply repeating commands?

    One such feature of the Bash shell that can be changed in your customized settings is the history command, which is affected by some environment variables and some shell options (shopt – a command to set and unset shell options).

  • How to Install Craft CMS with Nginx on Ubuntu 20.04

    Craft CMS is a free, open-source content management system for websites. Supported by a large and growing community of developers and designers, it offers a range of innovative features with an elegant design that makes it easy to use. It also allows you to control every aspect of your site's development.
    It’s a great alternative to WordPress and Drupal, which are two of the most popular content management systems in use today.
    A Content Management System (CMS) is software used to make managing web content easier, such as editing content or adding new pages and pictures. Operating a website can be difficult if you need to create each page individually in code using HTML or other markup languages; this can cause problems if you have multiple people working on your site at once since there may not be agreement over how certain elements should look or behave.
    Using a CMS allows you to set the general structure of each page as well as specific elements, such as a blog post or product description; then when someone else needs to edit that information they only need to use the CMS.
    This guide shows how to install Craft CMS on Ubuntu 20.04 LTS (Focal Fossa). It will show you how to install Craft CMS on your Ubuntu server. If you want to use the MySQL/MariaDB database, then this guide will help you install that too.
    The process for installing Craft CMS on Ubuntu is similar regardless of which distribution and version you are using, so you should be able to follow this guide even if your system is slightly different. This tutorial was created with a fresh installation of Ubuntu in mind; however some steps may vary slightly depending on your current server setup.

  • Avoiding dual writes in event-driven applications

    Dual writes frequently cause issues in distributed, event-driven applications. A dual write occurs when an application has to change data in two different systems, such as when an application needs to persist data in the database and send a Kafka message to notify other systems. If one of these two operations fails, you might end up with inconsistent data. Dual writes can be hard to detect and fix.

  • Fedora Magazine: 4 cool new projects to try in Copr from July 2021

    Copr is a collection of personal repositories for software that isn’t carried in Fedora Linux. Some software doesn’t conform to standards that allow easy packaging. Or it may not meet other Fedora Linux standards, despite being free and open-source. Copr can offer these projects outside the Fedora Linux set of packages. Software in Copr isn’t supported by Fedora infrastructure or signed by the project. However, it can be a neat way to try new or experimental software.

    This article presents a few new and interesting projects in Copr. If you’re new to using Copr, see the Copr User Documentation for how to get started.

  • Get the disk health status with SMART monitor tools on Debian and Ubuntu Linux

    Every current disk includes a built-in monitoring feature known as SMART that keeps track of faults. On Linux, there is a software package called smartmontools that may be used to query the SMART status of the disk to see if it will fail soon.

More in Tux Machines

Linux 5.16 To Bring Initial DisplayPort 2.0 Support For AMD Radeon Driver (AMDGPU)

A batch of feature updates was submitted today for DRM-Next of early feature work slated to come to the next version of the Linux kernel. AMDGPU driver feature work continues accumulating for what will become Linux 5.16 and debut as stable around the start of the new year. Most notable with today's pull request is initial enablement in this open-source AMD Radeon kernel graphics driver around DisplayPort 2.0. Since August we've been reporting on AMDGPU patches for DisplayPort 2.0, particularly around the Ultra High Bit Rate 10 (UHBR 10) support. Read more

4MLinux 37.1 released.

This is a minor (point) release in the 4MLinux STABLE channel, which comes with the Linux kernel 5.10.63. The 4MLinux Server now includes Apache 2.4.49, MariaDB 10.6.4, and PHP 7.4.23 (see this post for more details). Read more

Audiocasts/Shows: Linux in the Ham Shack, GNOME, Goto, Ubuntu MATE 21.10 Beta, and Destination Linux

  • LHS Episode #431: SDR++ Deep Dive

    Hello and welcome to Episode 431 of Linux in the Ham Shack. In this episode, the hosts take an in-depth look at the SDR++ client program for SDR receivers and transceivers. Topics include where to find the software, it's origins, code base and license and more. Further discussion includes installing from the package repos or building the software, running the code, configuring the basic features as well as navigating the interface and controlling your SDR. We hope you enjoy this content and tune in for the next episodes as well. Have a great week.

  • A Better Menu For The GNOME Desktop - Invidious

    Fly-Pie is a GNOME extension that let's you create your own custom menus. You can use it to launch applications, simulate hotkeys, open URLs and much more. The coolest feature, in my opinion, is how easy it is to navigate the menus either by clicking or by simply dragging the mouse.

  • Alias & Navigate Anywhere On Linux With Goto - Invidious

    Managing your navigation aliases under Linux can be a bit of a hassle and today we're looking at a tool called goto that aims to simplify that process, by separating those out from the rest of your shell aliases and providing some useful extra functionality like tab completion

  • Ubuntu MATE 21.10 Beta Run Through - Invidious

    In this video, we are looking at Ubuntu MATE 21.10 Beta. Enjoy!

  • Ubuntu MATE 21.10 Beta

    Today we are looking at Ubuntu MATE 21.10 Beta. It comes with Linux Kernel 5.13, MATE Desktop 1.26, and uses about 900MB of ram when idling. Enjoy!

  • Destination Linux 245: What Linux Needs For Desktop Domination

    This week’s episode of Destination Linux, we’re going to discuss what’s needed to take Linux desktop over the finish line. Then we’re going to pay our respects to Sir Clive Sinclair with a very special Treasure Hunt. Plus we’ve also got our famous tips, tricks and software picks. All of this and so much more this week on Destination Linux. So whether you’re brand new to Linux and open source or a guru of sudo. This is the podcast for you.

today's howtos

  • How to install Friday Night Funkin' - QT Mod on a Chromebook

    Today we are looking at how to install Friday Night Funkin' - QT Mod on a Chromebook. Please follow the video/audio guide as a tutorial where we explain the process step by step and use the commands below.

  • Linux 101: What does "sourcing a file" mean in Linux? - TechRepublic

    Sourcing a file in Linux is a very important concept, but it might not be one you'll use early on in your Linux career. Even so, I'm going to try to explain this challenging concept in a way you can understand it. Sourcing a file makes it possible for an executable to "source" information from a script as though the script had printed its output to the terminal. It's not an easy concept to grasp, so I'm going to show you by way of an example.

  • 3 Ways to install Slack in Ubuntu 20.04 LTS (Focal Fossa) - Linux Shout

    Slack is a group collaboration tool designed for teams that work in different locations. Primarily used for communication in teams, as the service can be perfectly integrated into the workflow. Users can link Slack with many other services, for example with cloud services such as Dropbox or with social networks. So Slack becomes the focal point of the action. At its core, Slack is instant messaging software. In addition to direct messaging, Slack enables communication “channels” that can be organized by project, customer, team, or any other way your company deems appropriate for separate conversations. Channels are structured according to the concept of a chat room: All channel participants can take part in the conversation and the messages appear in real-time.

  • Install Ruby on CentOS/RHEL 8 with 3 different methods - Unixcop

    Ruby is a dynamic, open source programming language with a focus on simplicity and productivity. It has an elegant syntax that is natural to read and easy to write. Ruby is seen as a flexible language, since it allows its users to freely alter its parts. Essential parts of Ruby can be removed or redefined, at will. Existing parts can added upon. Ruby tries not to restrict the coder. Ruby can_be used in diverse applications such as data analysis and prototyping. In this installation guide, you will learn how to install Ruby on CentOS 8 and RHEL 8 Linux.

  • How to Check Which Desktop Environment You’re Using on Linux

    As you might know, Linux-based operating systems are heavily focused on the command line for performing operations. A minimal distro like Arch Linux will present you with a dark terminal post-installation. What makes Linux distros interactive and user-friendly often goes unnoticed—the desktop environment. Most beginner Linux users are unaware of desktop environments and don't even know which one they're using. Here's how you can check which desktop environment is currently installed on your Linux system.