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today's howtos

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HowTos
  • How To Install Munin on Ubuntu 20.04 LTS - idroot

    In this tutorial, we will show you how to install Munin on Ubuntu 20.04 LTS. For those of you who didn’t know, Munin is a web-based tool to monitor system and network statistics. Munin shows this information through Graphs. It helps the system administrators to collect various system information that can be viewed via a web interface such as processor load, hard disk usage, network traffic, access to server services on one or more computers, 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 the step-by-step installation of the Munin server monitoring 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 Install Ruby on Rails on Debian 11

    Ruby on Rails is a free, open-source, and one of the most popular application stacks used for creating sites and web apps. It is written in Ruby programming language and follows the MVC concept. It comes with the Rails development framework that makes app development easier. There are many well-known applications based on Rails, such as Github, Airbnb, Soundcloud, etc.

    In this tutorial, I will show you how to install Ruby on Rails on a Debian 11 system.

  • How to Install Python 3.9 on Rocky Linux 8

    Python is a programming language that can be used to create just about anything. From full-scale games to web applications, and even simple scripts for your PC or Mac. Python has been around since the late 1980s and continues to be one of the most popular languages in use today.
    Today’s tutorial will show you how to install Python 3.9 programming language on a Rocky Linux 8 system.

  • How to Install Yarn JS (Node) Package Manager on Debian 11 – VITUX

    Yarn is a package manager for Javascript. It is meant to replace npm (node package manager). Yarn uses a different way to install packages. Instead of installing from the registry, it installs packages from other nodes in your network that have already downloaded the package and its dependencies. This can speed up installations, especially in projects with lots of node modules.

    Yarn works exactly the same as npm, but with some benefits. First of all, it tells you which version of a package that was installed is compatible with your project. This makes it easier if you need to roll back or update packages. Secondly, it makes your packages more secure. Every package’s checksum is validated before it’s run by Yarn. This means that if a developer installs an outdated or corrupted package, Yarn will be able to detect the error, show the error in an easy-to-read format, and allow them to correct it before executing the code.
    It isn’t easy to say whether the yarn is better than npm or vice versa. It’s just different. If you want an easy-to-use package manager that makes your packages more secure, the yarn might be the answer.

    If you are a developer, chances are you have heard of Yarn. Installing yarn on Debian 11 can be tricky if you’re unfamiliar with the process, but this tutorial will walk you through the process step-by-step so that after reading this post, installing Yarn should be as easy as 1-2-3!

  • How to Record Your Desktop Screen in Ubuntu 21.10 Wayland with Kooha | UbuntuHandbook

    Looking for how to record Ubuntu desktop in Wayland session? Here’s how to do it in Ubuntu 21.10 using Kooha.

    Ubuntu switched to “Wayland” session since Ubuntu 21.04. However, many apps, e.g., Kazam, Peek and vokoscreen-NG, do not support it. Some apps including OBS-Studio claim to support for Wayland, but either record blank screen or just refuse to work!

    The best solution in my opinion is switch back to Xorg session. To do so, simply log out, select your user and then choose “Ubuntu on Xorg” via bottom-right gear button menu. All the apps will work once you login with Xorg.

    For those sticking to the default Wayland, Kooha is one of good choices until GNOME’s “in-shell” screenshot & screencast UI is out.

  • How to configure automatic updates in Ubuntu Server - blackMORE Ops

    This guide explains how to configure automatic updates in Ubuntu Server 20.04. This tutorial is based on the following official Ubuntu Documentation article: Ubuntu Server Guide » Package Management » Automatic Updates. If you just want to do it, scroll down to the end and copy paste the two configuration file configs and you’re done. If you want to understand it and tweak, then keep reading.

  • How to create an Application Load Balancer on AWS

    Load Balancer falls under the EC2 services of AWS. An Application Load Balancer works at the seventh layer of the Open Systems Interconnection (OSI) model, the application layer. We can add and remove targets from our load balancer as per our needs without affecting the flow of requests to the application. Application Load Balancer supports for path-based routing: forward requests based on the URL in the request, host-based routing: forward requests based on the host field in the HTTP header, routing based on fields in the request, registering targets by IP address: targets outside the VPC for the load balancer can also be added. These are a few of the benefits of using the Application Load Balancer.

  • How to edit files inside Docker container? - blackMORE Ops

    Just migrating everything to bunch of new RaspberryPi 4 8GB from my VMware farm. Instead of using multiple Raspberry Pi 4, I decided to use Docker and move as many I can into each one of these. I’ve think Home Assistant (with supervisor), Pi-Hole, Pi-VPN, UnBound and my NoIP2 scripts one Raspberry Pi4 8GB Pi running Debian 11 BullsEye and docker and Plex Server onto another Pi should do the trick. Anyhow, ran into an interesting problem with Undound where I needed to edit the configuration file nano application.yaml or vi unbound.sh and it said, nano or vi wasn’t installed.

  • Configuring TACACS+ Server With A Simple GUI | Linux Journal

    Managing authentication and authorization in a large-scale network is a challenge: the passwords need to be set and rotated every now and then, access to certain configuration settings needs to be controlled and, finally, users’ actions need to be logged somewhere. This poses a need for a centralized controller in the network that is responsible for such functions. Modern routers and switches, which typically run Linux operating systems, support TACACS+ protocol that enables system administrators to implement flexible rules for authentication and authorization. However, TACACS+ server implementation for Linux operating system, although neat, lacks a graphical user interface which makes daemon configuration a smooth and intuitive process. In the next few paragraphs, we will discuss how to configure the TACACS+ daemon on Linux operating system and demonstrate how to deploy a simple, yet intuitive, GUI used for the configuration of the TACACS+ instance.

    TACACS+, which stands for Terminal Access Controller Access-Control System Plus, is a protocol mainly designed by Cisco and standardized in RFC8907. The primary goal of the protocol is to handle authentication and authorization of commands executed on remote telecommunication hardware on a centralized server. TACACS+ is a great protocol and can be compared to RADIUS. Its key advantages are the following: it allows scrambling or obfuscating (although, not really encrypting in a cryptographic sense) the entire payload with help of MD5 hash function and a secret shared between telecommunication hardware and a central server, it supports TCP protocol for transport, and it provides the possibility of carrying out AAA functions in a flexible way. More details on the protocol can be found in the corresponding RFC.

  • Install Veritas Cluster server on CentOS 8 | RHEL 8 step by step - Unixcop

    This step-by-step guide intended to provide practical documentation for installing InfoScale Enterprise 7.4.1 in a non-production capacity. There is a innumerable of configurations for software products and the one used in this article is only meant to be used to demonstrate InfoScale’s . In this article we are about to learn how to Install Veritas Cluster server on CentOS 8 | RHEL 8 step by step.

    So The installation of InfoScale can_be performed using ISO installer, YUM, Response file, Kick start installer or from System management Satellite server.

    Also In our article, we are going to accomplish the installation using ISO installer.

  • Kubernetes: Install using MicroK8s on Ubuntu - Anto ./ Online

    This guide will show you how to install Kubernetes using MicroK8s on Ubuntu. MicroK8s makes it super easy to get going with Kubernetes. Additionally, MicroK8s is bundled with tools such as Prometheus. So you simply enable a feature if you need it.

  • How to install Anydesk on Ubuntu / Linux Mint - Unixcop

    AnyDesk is a closed source remote desktop application distributed by AnyDesk Software GmbH. The proprietary software program provides platform independent remote access to personal computers and other devices running the host application Due to this, the program often employed by internet scammers to take control of their victims computer over the internet. It offers remote control, file transfer, and VPN functionality.

    Also Anydesk has an attractive user-friendly interface and administrative tools through which you can easily manage the remote systems.

    WithAnyDesk, you can record everything you see on your computer as a video file so you can play back at any time.

    So In this guide, we will show you how to install AnyDesk on Ubuntu 20.04 and Linux Mint 20

    After that you can easily access your team member or friend’s system.

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  • css vs webgl cubes

    I wanted to conduct a little experiment, and it turned into a few experiments in one. I was watching a youtube video about creating 3D scenes purely in CSS. At first, it seems pretty ridiculous. Surely this has to be too much effort, but then as it came together, it wasn’t that difficult. CSS has more potential as a lightweight 3D rendering language than I may have suspected.

    So I figured what we need is a side by side comparison. I could just watch more videos, or look at some demos, but it’s helpful to retype things and change them around a little bit for more understanding.

  • A Brutally Simple Site

    I teased last week that I’ve been working on a new brutalist design for this website. Well, this is the result.

  • Perl Weekly Challenge 165: Scalable Vector Graphics

    These are some answers to the Week 165 of the Perl Weekly Challenge organized by Mohammad S. Anwar. This week, Task 1 and part of Task 2 relate to Scalable Vector Graphics (SVG). I’d been using SVG a very long time ago and certainly didn’t remember any of the details. So, in my first blog relating to PWC 165, I stated that I didn’t have time for that and covered only the part of the challenge not related to SVG. I also said that, in the event that I find some time over the weekend, I might come back and fulfill the SVG part. I thought at the time that this was rather unlikely, but I was finally able to cover the SVG part, at least in Raku.

  • Getting a Bourne shell "here document" into a shell variable

    Suppose, for reasons to be discussed in a later entry, you would like to write a shell script that turns an embedded here document into a shell variable (ie, an unexported environment variable). As a preview, one reason to want to do this is that here documents allow almost arbitrary contents, while other forms of getting things into environment variables or command line arguments may block using certain characters or require awkward quoting.

  • LibreSSL updated to 3.5.3

    LibreSSL 3.5.3 was released on May 18th, 2022.

8 Best Free and Open Source Survey Tools

Surveys are one of the most effective tools for obtaining customer feedback. However, creating and distributing them can be very challenging. Without the right software, you can spend days, even weeks, trying to create a perfect survey. And even then the quality and formatting of the survey may fall short of industry standards. You may therefore need a survey creation tool that can help set up an effective feedback loop. The software featured here lets you build fully-customizable surveys, forms and quizzes. Here’s our verdict captured in a legendary LinuxLinks chart. Only free and open source software is included. Each application can be self-hosted on your own server. Read more

Open Source developments in Bratislava

The City of Bratislava is currently building a whole new ecosystem of open source digital services under the leadership of its CIO Petra Dzurovčinová. These services will be tested in Bratislava and then ate planned to be expanded to other cities in Slovakia with a goal of limiting the existing vendor lock-in and improving public services for the residents.

According to Petra, choosing open source solutions for the digital transformation of the city is based not only on the long-term economic incentive, but more importantly, on the quality of services to be provided for the citizens. The digitisation team in Bratislava took on the task by first identifying and understanding the needs of the citizens through iterative processes involving interviews, co-creation and cooperating with other cities. A large part of the work has been done internally in the conceptualisation phase to steer the next steps of developing technological solutions and ensure achieving the planned objectives.

Read more