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today's howtos

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  • The Beginner's Guide to Btrfs - Make Tech Easier

    Most desktop Linux users have probably heard of a “Copy on Write” filesystem like ZFS or Btrfs, and along with that, the benefits of those CoW filesystems. Compression, built-in RAID functionality, and snapshot capabilities make them incredibly advanced and modern filesystems. But how do you get started with one of these filesystems? Given that Btrfs is fully FOSS and built into the Linux Kernel, that’s a great place to start. Here we walk you through our beginner’s guide to Btrfs.

  • How to play multiplayer arcade games on Linux

    Fightcade is an emulator that allows PC gamers to enjoy fighting arcade video games with their friends over the internet. If you’re a Linux gamer who loves playing old arcade games, this guide is for you. Follow along as we go over how to set up Fightcade on Linux!

    Installing Fightcade on Linux

    Before we can go over how to play fighting arcade games online with friends on Linux, the Fightcade client must be installed. Thankfully, the developers behind the app make it super easy to install on a multitude of Linux distributions.

    To start installing Fightcade on your Linux PC, open up a terminal window on the Linux desktop. Once the terminal window is open on your computer, follow along with the installation instructions below to get Fightcade set up on your computer.

  • How to Install MySQL 8 on CentOS 8

    MySQL Server is the most popular tool used for relational databases. It hosts multiple databases using a single server where allows multi-user can access these databases individually. At the time, when we are writing this article MySQL Server 8.0 is available for installation. This version introduced some new features that are not compatible with some applications. So, first, read the application documentation before deploy on CentOS 8 server.

    In this article, we will explain how to install MySQL on CentOS 8 using the terminal. We will also show you how to get started with using MySQL 8.

  • Recording animated Gifs with Peek on Debian 10 Buster

    If you want to extract a gif from any video without having a lot of video editing expertise, Peek should be your go-to tool. It is a very simple screen recorder with an easy to use interface. Peek makes it easy to create short screencasts of a screen area. It was built for the specific use case of recording screen areas, e.g. for easily showing UI features of your own apps or for showing a bug in bug reports. With Peek, you simply place the Peek window over the area you want to record and press “Record”. Peek is optimized for generating animated GIFs, but you can also directly record to WebM or MP4 if you prefer. Peek is not a general-purpose screencast app with extended features but rather focuses on the single task of creating small, silent screencasts of an area of the screen for creating GIF animations or silent WebM or MP4 videos.

  • How to install FileZilla Client on Ubuntu 20.04 LTS Linux - Linux Shout

    Most of us managing files on hosting servers by directly opening the file manager on CPANEL via HTTP protocol, however, that is actually not an FTP connection. The FTP protocol is meant for uploading or downloading files to web servers and file servers. And if you want to use an FTP connection to connect your Cloud or hosting server then Filezilla is one of the best clients available for Windows, macOS, and Linux.

More in Tux Machines

Video/Shows: Yacy, Ubuntu 20.04 LTS Vs Ubuntu 20.10, Picom

  • Yacy Is The Search Engine That Respects Your Privacy - YouTube

    Yacy is a decentralized, peer-to-peer web search engine. All users are equal with no central controlling authority. Access to the search functions is made by a locally running web server which provides a search box to enter search terms, and returns search results in a similar format to other popular search engines.

  • Ubuntu 20.04 LTS Vs Ubuntu 20.10 | Which Is The BEST Version? | 7 THINGS To Consider - YouTube

    Ubuntu 20.10, Groovy Gorilla is out and like all non-LTS releases, this version is packed with new features and changes. We get a ton of improvements in the user interface especially. With GNOME 3.38 bringing many advancements like an adjustable Application grid, an efficient calendar and so much more to this new Ubuntu, We now have 2 actively supported versions of Ubuntu to choose from. And they both are quite different from each other in how they look, how they behave, their support period, their target user base, and many other things.

  • Picom: Window Blur Should Always Be This Easy - YouTube

    Window blur has been an absolute pain with picom, you've had run really out of date forks that have other missing features that you might want but no longer because it can be done in the main picom fork.

How to monitor file content while they change in Linux

Monitoring file changes in a real time is very easy to do task in Linux System. Directory, files, logs, etc. Changes can be easily monitored in real-time with the help of the watch command. The watch is easy to use the program to monitor changes in files or directories in Linux. It’s come by pre-installed in all Debian and arch-based Linux System. Check Watch is in system or not Execute the below command to know watch command is properly working in your system or not. Read more

Android Leftovers

IBM/Red Hat Leftovers

  • Ken Hess (Red Hat): Cyber Week 2020: 13 ideas for what to buy the sysadmin in your life | Enable Sysadmin

    It's that special time of year when you can get great discounts on tech for your favorite sysadmin.

  • [IBM Emeritus] Irving Wladawsky-Berger: Are There Limits to the Predictability of Elections?

    The elegant mathematical models of classical mechanics depict a world in which objects exhibit deterministic behaviors. These models make perfect predictions within the accuracy of their human-scale measurements. But, once you start dealing with atoms, molecules and exotic subatomic particles, you find yourself in a very different world, one with somewhat counter-intuitive behaviors governed by the laws of quantum mechanics. The orderly, predictable models of classical physics have now given way to wave functions, uncertainty principles, quantum tunneling and wave-particle dualities. But, the world of the very small is not the only one with non-deterministic behaviors. So are highly complex systems, especially those systems whose components and interrelationships are themselves quite complex. This is the case with social systems, which are based on individuals, groups, and institutions. It’s quite a challenge to make accurate predictions in such systems due to the the dynamic nature of human behaviors. Terms, like emergence, long tails, and butterfly effects - every bit as fanciful as quarks, charm and strangeness, - are part of the social systems lexicon. Which brings us to the 2020 US election. “The polls were wrong again, and much of America wants to know why,” wrote NY Times journalist David Leonhardt in a recent article. “This is a disaster for the polling industry and for media outlets and analysts that package and interpret the polls for public consumption, such as FiveThirtyEight, The New York Times’ Upshot, and The Economist’s election unit,” said David Graham in The Atlantic.

  • [Red Hat] Why failure should be normalized and how to do it | Opensource.com

    All of your heroes have failures under their belts—from minor mistakes to major disasters. Nobody knows how to do everything automatically, and the process of learning is usually a messy one. So why is the perception that everyone but you knows what they’re doing so common? Why do we externalize our successes but internalize our failures? How does it make you feel when you struggle to learn something new, then see another person take their Jira card away and return at the end of the sprint with something fully fleshed out and working, gushing about it at the demo? Sure, you closed your card too, but it was really hard! There was a new algorithm, a new programming language, a new system all to be learned. How did she make it look so effortless? The truth is, she might have struggled with the same issues you did and wondered how you made it look so effortless! [...] It could be very easy to title this section "my mistakes" and then rattle off all the times I’ve made mistakes, but that doesn’t quite illustrate the point. I recognize these mistakes, but they’re also events that expanded the understanding of my craft. While I didn’t set out to intentionally do any of these things, I certainly learned from them. I have accidentally dropped (deleted) a customer’s database. It was lucky for everyone that it was a beta-phase database and no further harm was done. I learned a valuable lesson that day: be very watchful of what code is doing, and be careful about what environment you are working in. One day, while performing routine maintenance with an odd DNS setup, I accidentally broke the ability for customers to provide credit card information to the secure site. We had two "payments" DNS records that served to override a wildcard DNS record, and I assumed that the second "payments" record was still present. It wasn’t. And then the wildcard record took over, and the DNS started behaving like "payments" wasn’t special at all anymore. Of course, I had no idea this was happening at all—it wasn’t until my maintenance was over that I learned of the folly. Customers weren’t able to provide payment information for almost two hours! I learned my lesson, though: when there is something special about a particular configuration, be sure to make sure it stays special throughout its lifetime. When DNS gets involved, all kinds of things can break.