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today's howtos

  • How to Install Magento 2 on Ubuntu 20.04

    In this guide, we will show you how to install Magento 2 with LEMP stack on an Ubuntu 20.04 VPS. Magento is one of the most popular open-source e-commerce platforms available, thanks to its customizability and flexibility. It is created using the Zend Framework and uses MySQL as its database management system. Magento provides online merchants with a very flexible shopping cart and it comes with a rich set of features. Installing Magento 2 on Ubuntu 20.04 should take less than 10 minutes to complete. Let’s get started with the tutorial.

  • How to create an RPM package from a tarball

    Creating RPM package files can be both as easy or complicated as you desire. If you're needing to create an RPM package from a tarball (.tar.gz) that a vendor sent you, this tutorial will be beneficial for you. In this tutorial, I will describe a step-by-step procedure for building an RPM package from a tar file. The procedure includes creating the required directory structure, configuring a .spec file required for the rpmbuild process, and building and installing the RPM package. An additional step is added for those who may need to create more RPM packages in the future via a skeleton file.

  • CrowdSec - Open Source Security Automation Tool - Putorius

    CrowdSec is a massively multiplayer firewall designed to protect Linux servers, services, containers, or virtual machines exposed on the internet with a server-side agent. It was inspired by Fail2Ban and aims to be a modernized, collaborative version of that intrusion-prevention tool. CrowdSec is free and open source (under an MIT License), with the source code available on GitHub. It is using a behavior analysis system to qualify whether someone is trying to hack you, based on your logs. If your agent detects such aggression, the offending IP is then dealt with and sent for curation. If this signal passes the curation process, the IP is then redistributed to all users sharing a similar technological profile to “immunize” them against this IP.

  • Ubuntu Blog: Creating Graphical Shells – Try Mir in a Virtual Machine

    Mir works with the modern Wayland protocol which, in principle, provides many advantages over the traditional X protocol used by legacy systems. With Wayland becoming more widely supported the practice is now catching up with the theory. There are a range of graphical shells created with Mir ranging from the simple “kiosk” used for IoT by the mir-kiosk snap to the Lomiri shell used by the Ubuntu Touch phone. We have made it simple to try out a range of Mir-based shells in a virtual machine. This should give you some idea of the possibilities of using Mir.

  • Creating and merging PDFs on Linux | Network World

    There are a number of ways that you can create PDFs on a Linux system. You can use an application like LibreOffice or OpenOffice, or you can take advantage of any of a number of commands that can generate PDFs from text files or from a group of other file formats. There are also a number of ways that you can merge a group of PDFs into a single PDF file.

  • 10 Useful Websites for Learning PostgreSQL Database System

    PostgreSQL (also known as Postgres ) is the world’s most popular and advanced open-source enterprise-grade object-relational database management system (ORDMS). PostgreSQL has a broad variety of community and commercial support choices accessible for users. The PostgreSQL community and other online learning resource providers, provide many helpful resources to become familiar with PostgreSQL, discover how it works, and learn/master how to use it.

  • Access Clipboard Contents Using Xclip and Xsel In Linux

    In this guide, we are going to learn what Xclip and Xsel programs are, and how to manipulate and access Clipboard contents using Xclip and Xsel programs in Linux. What are Xclip and Xsel programs? Xclip is a command line interface to X selections i.e. Clipboard. Xclip reads the data from one or more files and makes the data available as an X selection for pasting the data into X applications. If no files are specified, it reads data from the standard input. It can also print the X selection to the standard output.

  • How to Install Blender 2.92 in Ubuntu 20.04, 20.10 via PPA

    For those prefer installing apps via the classic apt method, you can now install Blender 2.92 via PPA in Ubuntu 20.04, Ubuntu 20.10, and also Ubuntu 16.04, Ubuntu 18.04. The open-source 3D modeller software Blender 2.92 was released a few days ago. Features “a completely new workflow for editing meshes, new physics simulation methods, faster Cycles rendering, better compositing with Eevee, and so much more.” Blender offers official Snap package, which runs in sandbox, and is available to install directly from Ubuntu Software. As well, a Linux portable package is available to download in its website. For those prefer the classic deb packages, Thomas Schiex’s PPA has made it for Ubuntu 20.04 and Ubuntu 20.10 users.

  • How to Install and Use GVM Vulnerability Scanner on Ubuntu 20.04

    GVM also called "Greenbone Vulnerability Management" is an open-source vulnerability scanning and management software that provides a set of network vulnerability tests to find security loopholes in systems and applications. This is an all-in-one suite of tools used by many security experts and normal users around the world. In this tutorial, we will show you how to install and configure GVM on Ubuntu 20.04 server.

  • How to Get Started Using Linux

    New to Linux and not sure how to get started? It's easier than you might think. Whether you're coming over from the macOS or Windows side, or just Linux-curious, you're sure to gain useful knowledge from this beginner's guide to using Linux.

  • How To Install Python 3.9 on Ubuntu, Debian & LinuxMint

    Python is an object-oriented, high-level programming language. The Python 3.9 stable version has been released with several improvements and security updates. Which included multiple new modules and improved existing modules and new features. As of today, Python 3.9 is the latest stable version available for production used. Most of the Debian based Linux distribution’s includes older version of Python in software repositories. Also the Debian packages are not available for all distributions. In this tutorial you will learn to compile Python 3.9 from source code and install on Debian based systems. This tutorial will help you to how to install Python 3.9 on Ubuntu, Debian, and LinuxMint systems using source code.

  • How To Install DirectAdmin on Ubuntu 20.04 LTS - idroot

    In this tutorial, we will show you how to install DirectAdmin on Ubuntu 20.04 LTS. For those of you who didn’t know, DirectAdmin is a web hosting control panel providing a graphical interface and automation tools to simplify server and account management. Features include E-mail, FTP, DNS and web management, Statistics, Apache configuration, User and reseller management, and more. 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 the DirectAdmin control panel on Ubuntu 20.04 (Focal Fossa). You can follow the same instructions for Ubuntu 18.04, 16.04, and any other Debian-based distribution like Linux Mint.

  • How to Use AUR in Arch Linux - Make Tech Easier

    If you’re using Arch Linux or an Arch-based distribution like Manjaro, Archbang, or EndeavourOS, you’ve probably seen the term AUR. What is it? How can you use it? Find out what AUR is and how to use AUR in Arch Linux. What Is AUR? The Arch User Repository (AUR) is a place where you can find software that’s not tested by Arch’s creators and maintainers but by its users. Thanks to this, you can access more software that’s not in the official repositories.

  • How to migrate CentOS 8 to AlmaLinux - YouTube

    AlmaLinux is an exciting new distribution, that aims to carry on CentOS (as we used to know it). In this video, I show of a migration script that can be used to migrate from CentOS8 to AlmaLinux, in place.

  • How to use NMAP command to test Server/Network Security - The Linux GURUS

    NMAP command (short for Network Mapper) is an open-source network security tool & is the best port scanner for your server/network. Nmap command is widely used for auditing the network security & also for the penetration testing of your networks. It displays the open or exposed ports or services on your or another target machine/network & along with that, it will also provide other information of the system like Operating system, etc. Another way that we can use Nmap is for “Network Discovery”.

  • How to fix apt's "the following packages have been kept back" issue

    Have you ever run sudo apt-get upgrade, only to be told there are packages that will be kept back? What this warning means is that the dependencies have changed on one of the software packages you have installed, and if upgrading that dependency would cause problems with the standard upgrade, the dependency in question is kept back. In other words, it's a precaution to prevent upgrades from breaking. Of course, you can always get around that by issuing the following command: sudo apt-get dist-upgrade However, that can be dangerous, as it may remove packages to resolve rather complex dependency problems. It's an issue that can be tricky to resolve, but not really. There are a couple of ways to resolve this issue.

Android Leftovers

IBM/Red Hat/Fedora: NeuroFedora, Ansible, IBM Power/OpenShift

  • 5 ways to ruin a sysadmin's day

    I don't subscribe to the notion that there's a "sysadmin brain," but there are a few things that really get under a sysadmin's skin. Sysadmins are generally very busy people and might appear to be curt, less-than-amused, or even rude at times. If you've ever heard the old saying, "Don't poke the bear," you should take heed. You have been warned. [...] Linux sysadmins are passionate about Linux. And, why shouldn't they be passionate about it? It is, after all, the best operating system ever created. See what I did there? If you want to ruin a sysadmin's day, say the opposite of that or disparage Linux in any way. Not only will you receive a litany of insults, rants, and passionate movie and song references, but you might also get a plateful of stale pizza bones* thrown at you. Linux sysadmins are Linux sysadmins because they love Linux and probably not for any other reason. There are easier, less stressful jobs to have. Air Traffic Controller often comes to mind as one option. Seriously, ruining a sysadmin's day with anti-Linux dialogue is perhaps the best way to end your friendly relationship and to place you at the bottom of the service request queue.

  • The NeuroFedora Blog: Next Open NeuroFedora meeting: 1 March 1300 UTC

    Please join us at the next regular Open NeuroFedora team meeting on Monday 1 March at 1300UTC in #fedora-neuro on IRC (Freenode). The meeting is a public meeting, and open for everyone to attend.

  • 5 tips for choosing an Ansible collection that's right for you | Opensource.com

    In August 2020, Ansible issued its first release since the developers split the core functionality from the vast majority of its modules and plugins. A few basic Ansible modules remain part of core Ansible—modules for templating configuration files, managing services, and installing packages. All the other modules and plugins found their homes in dedicated Ansible collections. This article offers a quick look at Ansible collections in general and—especially—how to recognize high-quality ones.

  • IBM brings Red Hat to Power systems | Network World

    IBM already has what it calls Enterprise Linux on Power, but this is bringing Red Hat, which IBM paid $34 billion to acquire, to its big iron. IBM Power systems now feature Red Hat OpenShift on IBM Power Virtual Server leveraging OpenShift's bare metal installer, Red Hat Runtimes, and newly certified Red Hat Ansible Content Collections. Red Hat OpenShift on IBM Power Virtual Server is a move to bring the OpenShift container platform to IBM Power Virtual Server. The IBM Power Virtual Server is an enterprise infrastructure-as-a-service offering built around IBM POWER9 and offering access to more than 200 IBM Cloud services. In addition, IBM Power Virtual Server clients can now run business applications like SAP HANA in an IBM POWER9-based cloud.

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