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HowTos

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  • Mullvad and TailScale coexisting (or “Hello Nftables!”)

    The fix was simple eventually – add two rules to the rules created by Mullvad, allowing access to & from the tailscale interface. However, since I took a look at Nftables, and I am sure I’ll forget it in a few days, I wanted to jot down the commands here for future reference.

  • The Origin of the Shell

    CTSS was developed during 1963 and 64. I was at MIT on the computer center staff at that time. After having written dozens of commands for CTSS, I reached the stage where I felt that commands should be usable as building blocks for writing more commands, just like subroutine libraries. Hence, I wrote "RUNCOM", a sort of shell driving the execution of command scripts, with argument substitution. The tool became instantly most popular, as it became possible to go home in the evening while leaving behind long runcoms executing overnight. It was quite neat for boring and repetitive tasks such as renaming, moving, updating, compiling, etc. whole directories of files for system and application maintenance and monitoring.

  • Self-modifying code in production

    YouTube famously uses a rolling cipher and effective downloader tools need to be able to decipher it to produce useful links to video files. The cipher changes every few days so downloader tools avoid the need for daily manual updates by automatically downloading the JavaScript implementation of the cipher from YouTube and caching the result.

    I use three downloader tools that have some automated mechanism for dealing with cipher updates.

  • The better way to make an Ubuntu 20.04 ISO that will boot on UEFI systems

    First, I've learned that you don't want to extract ISO images with 7z, however tempting and easy it seems. 7z has at least two issues with ISO images; it will quietly add the El Torito boot images to the extracted tree, in a new subdirectory called '[BOOT]', and it doesn't extract symlinks (and probably not other Rock Ridge attributes). The Ubuntu 20.04.1 amd64 live server image has some symlinks, although their presence isn't essential.

    The two reliable ways I know of to extract the 20.04.1 ISO image are with bsdtar (part of the libarchive-tools package in Ubuntu) and with xorriso itself. Bsdtar is easier to use but you probably don't have it installed, while you need xorriso anyway and might as well use it for this once you know how. So to unpack the ISO into our scratch tree, you want: [...]

  • How to Add Local User to Sudo Group in Debian Linux

    In Linux/Unix systems, sudo is a program that grants a regular user elevated privileges to execute administrator-level tasks. Once a regular user is added to the sudo group, they are able to carry out tasks that a reserve for the root user. Such include installing and removing software packages, starting and stopping services, updating and upgrading the system to mention a few.

  • How to Install PHP 8 on Debian - Cloudbooklet

    How to Install PHP 8 on Debian. This guide let you learn how install the latest PHP version 8 on your Debian system or your Debian server on any VPS or any Cloud or any Dedicated hosting and configure it with Apache and Nginx.

    The latest PHP 8 version is officially released on November 26th, 2020. It comes with a number of new features and a few incompatibilities that you should be aware of before upgrading from the previous version.

    This installation is tested on Google Cloud Platform with a Compute Compute Engine VM Instance. So this set up is guaranteed to work on all Linux based servers.

  • Configuring Dwm's Panel Is Easy With Dwmblocks - YouTube

    Dwm has a builtin panel that can be a bit tough to configure. Getting it to display the information that you want is not as simple as it should be. Thankfully, there is a program called dwmblocks that makes this a lot easier!

today's howtos

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  • How To Enable Timestamp In Bash History In Linux - OSTechNix

    How do you know the time at which the command was executed? Easy! This guide explains how to enable timestamp in Bash history in Linux.

  • How to install Mattermost Chat on Ubuntu 20.04 - RoseHosting

    Step-by-step process on how to install Mattermost Chat on Ubuntu 20.04. Follow this simple and easy guide.

  • How To Install Rust on CentOS 8 - idroot

    In this tutorial, we will show you how to install Rust on CentOS 8. For those of you who didn’t know, Rust, commonly known as Rust-Lang, is a system programming language that is developed by Mozilla and backed by LLVM. Rust is known for preventing program crashes, memory leaks, and data races before it is compiled into binary, thus creating a highly-productive and stable programming environment

    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 through the step by step installation of Rust programming language on CentOS 8.

  • How to Remove ‘Show Applications’ Icon From the Dock in Ubuntu 20.04 | UbuntuHandbook

    This is a beginner’s guide shows how to remove the ‘Show Applications’ app menu icon from the dock in Ubuntu 20.04, Ubuntu 20.10.

  • How to Install OpenNMS Network Monitoring Tool in CentOS 8

    OpenNMS is a free and open-source network monitoring and network management platform used for managing enterprise networks around the world. It is based on Java and is designed to manage thousands of devices from a central location. It has the ability to discover and monitor the services or nodes automatically in your network.

  • How to play Dark Souls III on Linux

    Dark Souls III is an action RPG video game developed by FromSoftware and published by Bandai Namco. It is the fourth game in the Souls series and the final game in the Souls trilogy. Here’s how to get the game working on Linux.

  • Openstack RDO && KVM Hypervisor: Install KDE Plasma on SparkyLinux GameOver 08/11 2020

    At the time of writing KDE Plasma install on any SparkyLinux 2020.09 might be committed via GDM3 installation right after KDE Plasma ( the last one via tasksel or CLI ) due to after system reboot GDM seems to be the only one DM on Sparky detecting previously installed KDE.

  • How to install VLC on a Chromebook

    Today we are looking at how to install VLC Media Player 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.

  • How to play Dark Souls II: Scholar of the First Sin on Linux

    Dark Souls II: Scholar of the First Sin is an action RPG video game developed by FromSoftware and published by Bandai Namco. In the game, the player’s character becomes Undead, cursed never to die, and becomes a hollow zombie creature with no memories or purpose.

  • Create your own Linux ecosystem with Nextcloud, DavX5 and KDE Connect

today's howtos

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  • How to Install and Use Flatpak on Linux

    In this guide, we focus on how you can install Flatpak and use it across various Linux distributions.

  • How to create a Linux RPM package | Enable Sysadmin

    You've written a great script that you want to distribute, so why not package it as an RPM?

  • How to Install PHP 8 on Ubuntu - Cloudbooklet

    Install PHP 8 on Ubuntu. This guide let you learn how install the latest PHP version 8 and upgrade to latest on your Ubuntu 20.04 or 18.04 systems or your Ubuntu server on any VPS or any Cloud or any Dedicated hosting and configure it with Apache and Nginx.

    The latest PHP 8 is officially released on November 26th, 2020. It comes with a number of new features and a few incompatibilities that you should be aware of before upgrading from the previous version.

    This installation is tested on Google Cloud Platform with a Compute Compute Engine VM Instance. This set up will work on all Linux servers.

  • Full Circle Magazine #163
  • How To Setup Firewall using FirewallD on CentOS 8 - idroot

    In this tutorial, we will show you how to setup a Firewall using FirewallD on CentOS 8. For those of you who didn’t know, FirewallD is an alternative to the iptables service, for dynamically managing a system’s firewall with support for network (or firewall) zones and provides a D-Bus interface for managing configurations. Starting with CentOS 7, FirewallD replaces iptables as the default firewall management tool.

    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 through the step by step Setup Firewall using FirewallD on CentOS 8.

  • How to install PHP 8 on Ubuntu 20.04 / Debian 10 - LinuxH2O

    In this article, you will learn how to install the latest PHP version 8 on Ubuntu 20.04 LTS, Debian 10, and their derivative distributions.

    PHP is one of the most popular server-side scripting languages. Most of the websites on the internet are using PHP including Facebook, Yahoo, Wikipedia. There are many frameworks that are also built with PHP, like WordPress, Codeigniter, Laravel, etc.

    This article will guide on how to install the latest stable release of PHP 8.0 on Ubuntu, Debian, and their derivatives like Mint, MX Linux, Elementary OS, POP OS, Zorin OS, etc.

  • [Old] How to install XRDP (Remote Desktop) Server on Centos 8

    XRDP is an open-source implementation of the Microsoft Remote Desktop (RDP) that allows you to graphically control your system. With RDP, you can log in to the remote machine the same as you had logged into the local machine. It uses Port 3389 for its connection. In this tutorial, we will look at how to set up the Remote desktop Connection on Centos 8.

today's howtos

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  • How to install Mageia Linux

    Mageia is an RPM-based Linux operating system forked from the famous French Linux distribution Mandriva. It is an open-source operating system and is an excellent option for using Linux the RPM way. In this guide, we’ll show you how to install the operating system on your computer.

  • How to free up RAM on Linux

    Are you running out of usable memory on your Linux PC? Are you trying to free up RAM space but don’t know how to do it? We can help! Follow along as we go over how to free up RAM on Linux!

  • [Older] How to monitor network activity on a Linux system - LinuxConfig.org

    In this article we learn how to monitor network activity on Linux.

  • How to Disable Your Webcam in Ubuntu?

    Find out these simple methods to disable webcam in Ubuntu. We can stop the webcam driver to load in Linux OS by modifying the configuration file.

  • How to install Code Blocks on Ubuntu 20.04 - YouTube

    In this video, we are looking at how to install Code Blocks on Ubuntu 20.04. Enjoy! For the command and more, look here: https://www.linuxmadesimple.info/2020/11/how-to-install-code-blocks-on-ubuntu.html

today's howtos

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  • Add, Delete And Grant Sudo Privileges To Users In CentOS - OSTechNix

    A "sudo" user can run an administrative task or command which a normal user is not allowed to. This guide explains how to add, delete and grant sudo privileges to users in CentOS and other RHEL-based systems. The steps given below are tested in CentOS 8 minimal edition, however it should work on other RPM-based systems as well.

  • How To Install Moodle on CentOS 8 - idroot

    In this tutorial, we will show you how to install Moodle on CentOS 8. For those of you who didn’t know, Moodle is an Open Source Course Management System (CMS), also known as a Learning Management System (LMS) or a Virtual Learning Environment (VLE). It has become very popular among educators around the world as a tool for creating online dynamic web sites for their students. Moodle brings features to include assignment submission, online quizzes, wiki, grading, instant messages, discussion boards, and others. But since it’s modular software, it can be extended via plugins to add extra functionality.

    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 through the step by step installation of Moodle course management system (CMS) on CentOS 8.

  • Solve error: cannot communicate with server dial unix /run/snapd.socket - Linux Shout

    Then this is because, after installation, the Daemon of SNAP is have not started yet and needs to start and enable manually by the user.

  • Running Multiple MariaDB Instances on Ubuntu 20.04 LTS – Linux Hint

    At times you may need to run multiple instances of the MariaDB database server software on the same computer/server. MariaDB has an official tool mysqld_multi to run multiple instances of the MariaDB database server software on the same computer/server.

    In this article, I am going to show you how to run multiple MariaDB database server instances on the same computer/server running the Ubuntu 20.04 LTS operating system. So, let’s get started.

  • Simple guide to install MongoDB on Ubuntu - LinuxTechLab

    MongoDB is an open-source general-purpose, document-based NoSQL database server which uses JSON documents. It is created keeping the current requirements of the cloud era & application developers in mind. It boasts many features, some of which are,

    Schemaless
    Provides replication
    Easy to scale-out
    index on any attribute
    auto-sharding
    Deep/rich query abilities, etc

  • The Calamares Series – everything you need to know about Calamares

    Like always some of the videos contain more information than the title suggests

  • Everything you need to know about pacman
  • Orchestrate event-driven, distributed services with Serverless Workflow and Kubernetes - Red Hat Developer

    Serverless workflows have gained renewed interest and usefulness with the rise of serverless architectures. Once seen as centralized and monolithic, they now play a key role in cloud-based event and service orchestration. Until recently, there was no vendor-neutral way to describe service orchestration, so developers were dependent on vendors and vendor implementations. We realized that we needed a common, standards-based language for describing serverless workflows.

    In this article, we introduce the Serverless Workflow specification, now in its 0.5 version release. Our goal with this project is to empower anyone to develop serverless workflow libraries, tooling, and infrastructure for modeling workflows across different cloud platforms.

today's howtos

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  • How to Install ElkArte Forum with Apache and Let's Encrypt SSL on CentOS 8

    ElkArte is a free and open-source forum software based on Simple Machine Forum. In this tutorial, we will show you howto install ElkArte with Let's Encrypt SSL on CentOS 8.

  • How to Fix 'Repository does not have a release file' Error in Ubuntu

    When installing software on Ubuntu, sometimes you may be required to add third-party PPAs. Adding PPAs enables you to access software packages that have not been included in official Ubuntu repositories. Sometimes, when updating your system or installing software packages, you may run into an error indicating that the added PPA does not have a release file.

    This error is quite frustrating as it limits your ability to manage software packages in an efficient manner. In this guide, we will guide you on how you can resolve this issue and go back to using your system without an issue.

  • How To Install Dotnet Core on Ubuntu 20.04 LTS - idroot [Ed: If for some reason you wish to help Microsoft]

    In this tutorial, we will show you how to install Dotnet Core on Ubuntu 20.04 LTS. For those of you who didn’t know, The .NET Core is a free and open-source software framework and open-source software framework. It is developed by Microsoft. It is developed by Microsoft. .NET Core is a very powerful framework. It is usually used to develop web applications.

  • How to install steam on ArcoLinux | Arcolinux.com

    The motto of ArcoLinux is Learn, have fun and enjoy.

    This is the have fun part for sure.

    We install steam via the terminal.

    The desktop you install steam on does not matter.

  • How to manage Linux permissions for users, groups, and others | Enable Sysadmin

    How to manage permissions and ownership for users, groups, and all others to resources such as directories and files.

  • How to set up DaVinci Resolve for High Resolution displays in Linux - Real Linux User

    The non linear video editor DaVinci Resolve on Linux is an incredible free tool, but does not give correct out of the box scaling for high resolution displays, so it will show an UI with very small icons and characters. Even on my 4K 32 inch monitor DaVinci Resolve is at first start up almost unusable, so if you have for example a smaller 27 inch monitor with the same 4K or higher resolution, the UI components are terribly small. In this short article I will show how you can change the scaling of DaVinci Resolve. So join me to see how to set up DaVinci Resolve for High Resolution displays in Linux.

today's howtos

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today's howtos

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HowTos
  • How To Install Redis on Linux Mint 20 - idroot

    In this tutorial, we will show you how to install Redis on Linux Mint 20. For those of you who didn’t know, Redis is an open-source in-memory key-value data store. It can be used as a database, cache and, message broker, and supports various data structures such as Strings, Hashes, Lists, Sets, and more. Redis provides high availability via Redis Sentinel and automatic partitioning across multiple Redis nodes with Redis Cluster.

    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 through the step by step installation of Redis on a Linux Mint 20 (Ulyana).

  • How to Download YouTube Videos in Linux | FOSS Linux

    YouTube is one of the websites with the most videos on the internet (as of writing this post, it is number one on the list). For some reason, you might need to download some videos to watch later while offline. Situations like following a tutorial playlist about a project or listening to your favorite songs while offline requires you to download some of these videos.

    Whatever your reason might be, we will show you how you can download YouTube Videos on a Linux system. We will guide you through both the graphical (GUI) and the command-line way. Let’s dive in!

  • How to play Minecraft Bedrock Edition on Linux [Ed: There are Free software clones that are not Microsoft's]

    Minecraft Bedrock Edition works on Linux with the help of the Minecraft Bedrock Launcher for Linux. It is an unofficial app that makes the game work on Linux with the Minecraft Android APK.

  • [Older] How to install Redis on Ubuntu Linux

    Redis is open source software used as a database and cache that sits in memory, allowing for exceptional performance. When you're ready to give this lightning fast program a try, the developers recommend installing Redis on a Linux system, and what better candidate than Ubuntu Linux?

    In this tutorial, we'll guide you through the step by step instructions of installing Redis (both server and client) on Ubuntu. Then, we'll verify that it's connectable and configure the UFW firewall to allow incoming connections.

  • How to install the NVIDIA drivers on Fedora 33 with Hybrid Switchable Graphics

    This is guide, how to install NVIDIA proprietary drivers on Fedora 33 with Hybrid Switchable Graphics [Intel + Nvidia GeForce]

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  • Shading in Blender – Linux Hint

    Shading is an act of adding shade to a drawn object to give it a look and a perception of depth. Nobody likes white bland 3D objects. In 3D modeling, it is very significant to give objects some color material or texture. The process of adding shades to color materials and textures is called shading. Shading is so essential in 3D modeling that Blender has a dedicated workspace for shading.

    Shading workspace will automatically bring us in the “Look Dev” mode. Look Dev mode approximates lights and gives a general idea of the output of the object or scene. The shader editor will show the shader nodes of the selected object. Every object in Blender can be assigned a default material with white shading. And these shaders can be manipulated in the Shading workspace. You can add material to any object by going into the material tab.

  • Blender Viewport Navigation – Linux Hint

    The viewport is the main view of Blender that a user sees after getting it installed. At first look, it may appear intimidating, but it has become a lot comprehensible after the launch of the 2.80 version. The interface is less complicated and simple to learn.

    The viewport is a window that allows you to look around the scene or object you created. Viewport and camera view can be confusing, but both are not similar. A camera is an object in the scene, whereas the viewport is a part of the interface.

    Basics of navigating viewport include rotating, zooming, and panning the perspective of the view. There are various ways to navigate in the viewport.

  • Blender Cloud Rendering – Linux Hint

    How does it feel when you create a beautiful scene in Blender with high definition textures, shaders, particles, and volumetric effects and when you click on rendering, it just says that you need 2 hours to render just one frame? Yes, it feels discouraging. It is not easy to render a high-quality image or animation using an ordinary workstation.

    It is not a piece of cake to render in Blender, especially when working in Cycles (rendering engine). 3D rendering requires a lot of computing power. If you are rendering an animation, then it will take much more power and time. It would be best if you had a powerful PC with high-end specifications to get decent results. The trouble is the affordability of a robust workstation; they are costly. But this issue is fixable; just use cloud rendering.

  • Delete/Drop a Database in MySQL – Linux Hint

    MySQL is an RDBMS (Relational Database Management System) that is famous for its speed and easy-to-use interface. In this article, you will learn about the different methods to delete or drop a database in MySQL. In this article, we assume that you already have a working knowledge of the creation and listing of databases in MySQL. So, feel free to read on if you have already installed MySQL on your system and have some dummy databases in MySQL that you want to delete.

  • CentOS 8 Restart Network – Linux Hint

    Among the most frequent system administration practices is the process of restarting the network. To connect your machine with the Internet, a sound networking service is always required. At times, due to undesirable issues, the networking service in a particular operating system may start malfunctioning. If the issue is temporary, then it can be resolved simply by restarting your networking service.

    There are multiple methods that you can use in any operating system to restart the system’s networking service. Today, we walk you through the two primary methods of restarting the network service in CentOS 8, one of the most popular distributions of the Linux operating system.

    If you are using a system based on CentOS 8 and are not able to establish a secure connection with your network, you would be shocked by how many issues a quick restart can solve. You can restart the Linux networking service using various commands, but you must execute the commands to restart the network using sudo or su commands as a root user.

  • Installation of Sublime text editor on Ubuntu 20.04

    Sublime Text is a well-known text editor used to write source code for web development. This tutorial will assist you in installing Sublime Text on an Ubuntu 20.04 machine.

  • WireShark in-depth Tutorial – Linux Hint

    Wireshark is an open-source and free network traffic inspection tool. It captures and displays packets in real-time for offline analysis in a human-readable format with microscopic details. It requires some sound knowledge of basic networking and is considered an essential tool for system administrators and network security experts.
    Wireshark is the de-facto go-to tool for several network problems that vary from network troubleshooting, security issue examination, inspecting network traffic of a suspicious application, debugging protocol implementations, along with network protocol learning purposes, etc.

    The Wireshark project was initiated in 1998. Thanks to the global networking expert’s voluntary contribution, it continues to make updates for new technologies and encryption standards. Hence, it’s by far one of the best packet analyzer tools and is utilized as a standard commercial tool by various government agencies, educational institutes, and non-profit organizations.

today's howtos

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  • How to Access Google Drive on Debian 10

    Google Drive is a cloud storage and synchronization service that allows users to keep, synchronize, and share files across many devices. It offers 15GB of free storage space for each Google account to store files.

  • Keep track of multiple Git remote repositories | Opensource.com

    Working with remote repositories gets confusing when the names of the remote repositories in your local Git repo are inconsistent.

  • Merging and sorting files in Linux: Easier than you think
  • How to Administrate CloudLinux OS from Command Line
  • 5 Ways to Install IntelliJ IDEA on Ubuntu

    Here learn how to download and install IntelliJ on Ubuntu. Intellij Idea can be installed simply from GUI and also from CLI.

  • How to Install Htop in Centos 8? – Linux Hint

    Htop is more like an immersive Centos 8 system process viewer and device monitor. It shows resource-usage measures in color and helps you to conveniently keep track of the performance of your system as an enhancement. With both an additional array of choices and a clear picture on the board, it is the same as the standard main command. It shows details about the usage of Processor & RAM, tasks being done, average load, and uptime. Besides, Htop shows a list of all operating processes and can even show it in a tree-like structure. If you are interested to interactively control your device, then one of your best choices ought to be the Htop command. It runs on all distributions of Linux, and in most situations, is enabled by default.

    In this tutorial, you will learn to install Htop on Centos 8 using the command-line.

  • How to Install Steam on NixOS? – Linux Hint

    When installing things on NixOS, you need to have a package in the right format on the nixos.org web page. Steam is available, but some quirks may trip you up when you try to install it. You will hear more about this here.

    In particular, it is a non-free software package, so you must enable this option. You will also need to handle the ‘glXChooseVisual failed’ problem. The process will work one way in NixOS and another way on other distributions. It is more complex with just the Nix package manager.

  • How to Install and Configure Angular CLI on Linux Distributions

    Modern and dynamic websites require many features, menus, and widgets to make the website user-friendly and reach the perfect marketplace. No matter which tool you use to create your website, javascript is always required to draw the finishing line

  • How to Install and Use FFmpeg in CentOS 8? – Linux Hint

    If you’d like a fast way of converting between audio and video files in Linux and would like something that doesn’t chew on resources and does the task properly, then you may give FFmpeg a try. FFmpeg is vital for keeping some level of familiarity between files uploaded by multiple users, as well as help maintain your storage space under control. When using FFmpeg, you can translate, adjust sample rates, record audio/video streams, and resize files between different video and audio formats. It provides a collection of audio and video libraries that are shared, including libavcodec, libavformat, and libavutil. Whenever it refers to converting files, FFmpeg has several command-line choices, and it is also recommended to use it from the CLI. Follow me on, and I’ll lead you to install FFmpeg in Centos 8.
    FFmpeg is not offered in the default repositories of Centos 8. You may opt to build FFmpeg utilities from the source or install them from the Negativo17 directory via DNF. In this article, we’ll move ahead with the second choice. It is also the fastest way to implement FFmpeg on the Centos 8 OS.

  • How to Kill Zombie Processes on Linux

    Linux, of course, has to keep track of all the applications and daemons running on your computer. One of the ways it does this is by maintaining the process table. This is a list of structures in kernel memory. Each process has an entry in this list that contains some information about it.

    There isn’t a great deal in each of the process table structures. They hold the process ID, a few other data items, and a pointer to the process control block (PCB) for that process.

    It’s the PCB that holds the many details Linux needs to look up or set for each process. The PCB is also updated as a process is created, given processing time, and finally destroyed.

  • How to Setup a Firewall with UFW on Debian 10 Linux - Linux Concept

    Nowadays, a Firewall is an essential utility and property of any system for security; by default Debian Operating system having a firewall configuration tool named UFW (Uncomplicated Firewall). UFW is a user-friendly front-end tool to manage iptables firewall rules. It provides you more straightforward methods to manage iptables as the name of this tool start from Uncomplicated.

  • How to Use arping Command in Linux – Linux Hint

    To a network administrator, the ARP protocol may sound familiar. ARP is a protocol that Layer 2 devices implement for discovering and communicating with each other. The arping tool works using this protocol.
    Now, why would you need arping? Imagine you are working with a small office network. Using the classic ping command to ping hosts to verify their availability is very tempting, right? Well, if you are using the ICMP protocol, then you are actually performing ARP requests for probing devices in the network.

    This is where the arping tool comes in. Like ping, arping pings network hosts using network layer ARP packets. This method is useful for hosts that do not respond to Layer 3 and Layer 4 ping requests.

    This article shows you how to use arping command in Linux.

  • How to configure YAML schema to make editing files easier - Red Hat Developer

    YAML is a friendly data serialization standard that works with all programming languages. While configuration files are often defined in YAML, it can even be used as a programming language, like the workflow language at Google, or Apache Camel K.

    It has the advantage of not having any braces, making it lightweight visually. One of the drawbacks is that editing YAML files may not always be easy. For instance, writing a tag at the wrong indentation level can be hard to detect. To help with editing, it is possible to provide a YAML schema that can be leveraged by a large set of integrated development environments (IDEs). Unfortunately, this practice is not widespread. Consequently, users waste time searching for a missing or extra space and browsing documentation.

    In this article, you will discover the benefits of providing a YAML schema and how to make it consumable for all your users, making it easier to edit YAML files.

  • How to connect and share data between two Linux systems

    I got an interesting request (not from singles in my area). One of my readers asked me, how does one go about connecting two Linux boxes - I presume for sharing purposes. This is a topic I've touched upon frequently, but often indirectly. As Commandant Lasard from Police Academy would say, there are many, many, many, many different ways to do this.

    So perhaps it's time for a proper tutorial. I will show you several common, robust ways to have two Linux systems communicate over network. We'll do it on the command line, then move up to file managers, and finally, also perform a remote data backup using a friendly GUI tool. Let's start.

  • How to manage user passwords on Linux

    If you’re a Linux admin, you probably take care of any number of servers, all of which contain numerous users. Those users log in via various means or protocols, such as SSH, FTP, HTTP. In order to successfully log in, those users have to have—passwords.

  • Linux patch management: How to back out a failed patch | Enable Sysadmin

    A good patch management plan always includes a good patch backout plan.

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Devices/Embedded: NanoPi, Arduino and More

  • NanoPi R4S SBC launched with optional metal case for $45 and up

    We found NanoPi R4S board in a work-in-progress Wiki last month. The tiny single board computer is designed for headless applications but comes with much better specifications compared to similar boards with a Rockchip RK3399 hexa-core processor with up to 4GB RAM, dual Gigabit Ethernet, and USB 3.0 ports. At the time we had limited information, but FriendlyELEC has now started selling the board for $45 and up, together with an optional metal case for a fanless operation that should ensure very good cooling.

  • Rockchip RK3568 processor to power edge computing and NVR applications

    We recently reported on the Rockchip developer conference (RKDC) 2020, and especially the upcoming Rockchip RK3588 Cortex-A76/A55 processor that packs a lot of power and features, and is now scheduled to launch in Q3 2021. But as you can imagine there were other products revealed during the conference, including the new Rockchip RK3568, similar to the previously announced RK3566, and designed for edge computing and network video recorder (NVR) applications.

  • Tiger Lake module supports industrial models

    Portwell’s “PCOM-B656VGL” Compact Type 6 module runs on 11th Gen Core CPUs including embedded “E” and industrial “GRE” models with up to 64GB DDR4-3200, 4x displays, 4x USB 3.2 Gen2, and 9x PCIe lanes, including 4x Gen4.

  • i.MX8M based SMARC module adds crypto chip and optional TSN

    Adlink’s rugged, Linux-ready “LEC-iMX8M” SMARC module combines a quad -A53 i.MX8M with a crypto chip plus up to 4GB DDR3L, up to 64GB eMMC, and support for HDMI 2.0a with 4K, 2x MIPI-CSI2, and up to 2x GbE with optional TSN. Earlier this month, we reported on Adlink’s SMARC 2.1 form-factor LEC-IMX8MP module with NXP’s AI-enabled i.MX8M Plus. Adlink has also posted a preliminary product page for a SMARC 2.1 module that builds on the standard, similarly quad-core, Cortex-A53 i.MX8M. The rugged LEC-iMX8M module is notable for its additional, AES-128-enabled cryptography chip with hardware key storage for up to 16 keys, certificates, or data.

  • Arduino Blog » Creating a continuum tentacle-like robot with Arduino

    Continuum robots — which look like a tentacle or perhaps an elephant’s trunk — use a series of linkage sections and internal tendons to move both horizontally and vertically. While they may seem quite exotic, in the video below element14 Presents’ DJ Harrigan breaks down how he built one with an Arduino Mega and a fairly simple list of parts.

Oracle/Red Hat/Fedora: Oracle Linux Cloud Native Environment, ABRT, XWayland, Satellite and Ansible

  • Announcing Oracle Linux Cloud Native Environment Release 1.2

    Oracle is pleased to announce the general availability of Oracle Linux Cloud Native Environment Release 1.2. This release includes several enhancements focused on improving the security and compliance of customer environments. Release 1.2 also includes new versions of core components, including Kubernetes, CRI-O, Kata Containers, and Istio. Oracle Linux Cloud Native Environment is an integrated suite of software components for the development and management of cloud-native applications. Based on the Cloud Native Computing Foundation and Open Container Initiative standards, Oracle Linux Cloud Native Environment delivers a simplified framework for installations, updates, upgrades, and configuration of key features for orchestrating microservices.

  • EOL of EL6 and EL7 and removal Customer portal support - ABRT

    For a long time, we talked about EOLing EL6 and EL7. What does it actually mean? RHEL 6 is going to be EOL at the end of this month (30th November 2020). We will no longer build ABRT packages for EL6 and we will stop supporting EL6 as content. RHEL 7 is still active but quite old. ABRT team will stop testing, building, and developing on top of RHEL7. We are going to focus on RHEL 8 and upcoming RHEL and Fedora. We still support RHEL 7 as content (e.g., in ABRT Analytics).

  • Fedora Looks To Provide Standalone XWayland Package Tracking X.Org Server Git - Phoronix

    With the X.Org Server being "abandonware" but at the same time the upstream XWayland portion of the codebase continuing to be worked on, Fedora developers at Red Hat are looking at splitting XWayland into its own standalone package to make it easier to ship it without having to use the rest of the xorg-server code-base. While Red Hat developers previously worked to manage X.Org Server releases, there isn't much upside to that these days and they would rather ship a standalone XWayland package for Fedora users rather than go through the process of new xorg-server releases.

  • Preparing for RHEL Extended Life Cycle Support with Red Hat Satellite and the Ansible Automation Platform

    Red Hat Enterprise Linux (RHEL) 6 was introduced more than 10 years ago, on November 9, 2010. Originally branched from Fedora 12, RHEL 6 has spent the last 10 years faithfully running Linux workloads. After more than a decade of faithful service, RHEL 6’s lifespan is nearly up: on November 30th, RHEL 6 will move out of Maintenance Support 2 and into Extended Life Cycle Support (ELS). Today, we’ll walk through how to prepare our Red Hat Satellite server for the switch of RHEL 6 to ELS, as well as adjusting our currently registered systems. We’ll be doing both of these things via Ansible and the newly introduced redhat.satellite Ansible Collection.

Kernel: IWD, OpenZFS and Mesa

  • Intel IWD 1.10 With DHCP v6 Support - Phoronix

    Version 1.10 of Intel's IWD "iNet Wireless Daemon" has been released as the increasingly useful alternative to the likes of WPA_Supplicant for Linux systems. Intel's open-source wireless daemon for Linux systems continues adding in more features and improvements. While it started out with a focus on minimalism and embedded use-cases, IWD is being evaluated for possible use on Ubuntu among other Linux distributions.

  • Notable Developer Starts Patreon to Fund Apple Silicon Linux Port - MacRumors

    Developer Hector Martin, who describes himself as someone who "likes putting Linux on things," has launched a plan create a Linux port for Apple Silicon Macs.

  • OpenZFS 2.0 Released With Unified FreeBSD/Linux Support, Many New Features - Phoronix

    OpenZFS 2.0 has been officially released! OpenZFS 2.0 marks a major step forward for open-source ZFS file-system support for what started out as ZFSOnLinux but is now OpenZFS with unified FreeBSD and Linux support (macOS support is still being pursued as well) and this release also bringing many new features.

  • [Mesa-dev] [ANNOUNCE] mesa 20.3.0-rc3
    Hi list,
    
    Mesa 20.3-rc3 is now available for general consumption. This is a few
    days late thanks to the US Thanksgiving holiday. I think we're
    pretty close to having .0 this week, just one issue left on the tracker.
    
    Dylan
    
  • Mesa 20.3 Is Near With Lavapipe Vulkan, Raspberry Pi V3DV, Better AMD RDNA2 Support - Phoronix

    The weekly release candidates of Mesa 20.3 fell off the wagon last week due to the US Thanksgiving holiday but now is updated today for Mesa 20.3-RC3. Mesa 20.3-RC3 is out and things are looking good for the stable release potentially in a week or two. There remains just one blocker bug left before Mesa 20.3.0 could be cleared for release.