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today's howtos

Submitted by Roy Schestowitz on Wednesday 10th of February 2021 05:49:00 AM Filed under
HowTos
  • How To Install Supervisor on CentOS 8 - idroot

    In this tutorial, we will show you how to install Supervisor on CentOS 8. For those of you who didn’t know, Supervisor is a client/server system that allows its users to monitor and control a number of processes on UNIX-like operating systems. It is used to control processes related to a project or a customer and is meant to start like any other program at boot time. Features of Supervisor include simple, centralized, efficient, extensible, compatible, and proven. The supervisor will manage your process to live all time.

    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 install of the Supervisor monitoring on CentOS 8.

  • How to Create DNS Records at Cloudflare - LinuxBabe

    In my mail server tutorials, I recommend running mail server on ScalaHosting VPS, because their IP addresses are not on any blacklist. And I also recommend purchasing a domain name from NameCheap because the price is low and they give whois privacy protection free for life. It’s a good practice to buy web hosting and domain name from different vendors. This can minimize damages to your business if your account is compromised. You can transfer your domain name to NameCheap and learn how to create DNS records at NameCheap.

    The DNS zone editor at ScalaHosting for self-managed VPS users is not very useful. If you accidentally bought a domain name from ScalaHosting, I recommend migrating your name server to Cloudflare, which features an easy-to-use DNS zone editor. Cloudflare can propagate your DNS records to the Internet in an instant, so you don’t have to wait several hours. Cloudflare also provides CDN (content delivery network) service and DDoS protection for free, so I highly recommend it.

  • How to Set Up Authoritative DNS Servers with Webmin - LinuxBabe

    In previous tutorials, we explained how to set up authoritative DNS servers and edit DNS records from the command line. However, some folks prefer to use a web GUI to edit DNS records. This tutorial is going to show you how to set up authoritative DNS servers with Webmin, which is a free open-source web-based control panel, so you can edit DNS records with a web interface.

  • How to check if a file exists in bash

    When you are working on a shell script in bash, there are cases where you want to check if a particular file exists (or does not exist) in a directory, and then perform an action based on the condition. In bash, there are several ways to check whether or a file exists in bash. In the following I demonstrate bash shell script examples for this use case.

  • How to Split Vim Screen Horizontally and Vertically in Linux

    Vim text editor, short for Vi IMproved, is one of the most powerful and popular Linux text editors that enjoys immense patronage from the open-source community. It is an improvement of the vi editor and uses a combination of regular keyboard keys to provide vast functionality.

    Vim provides colored syntax among other basic functionalities such as inserting and deleting text, copying and pasting text, and saving changes made to a file. The list of what you can do is quite long and the learning curve is steep.

    In this guide, we endeavor to show you various ways that you can split the Vim editor into different workspaces in the Linux command-line.

  • How to Dual Boot Arch Linux and Windows 10 on UEFI System

    In this guide, you will learn how to Dual boot Arch Linux with Windows 10 on UEFI system. This guide assumes that you already have Windows 10 installed on your system.

  • Unattended Debian installation | LibreByte

    Debian is a rock solid GNU/Linux distribution with more than 30,000 packages available in its official repositories. Debian is suitable for servers, workstations, mobile devices and embedded systems.

    Debian has a simple and clean installation system which allows installing Debian with little effort as long as the number of installations to be executed is minimal, but as this number grows the installation procedure becomes cumbersome and tedious (Please note that during the installation process it is necessary to answer configuration questions and package selection), for example if we want to install Debian in a lab that has 15 workstations, we need to repeat this process 15 times, which is possible , but if we want to deploy Debian in mass, for example 100, 200, 500 or 1000 installations, it is no longer feasible, this is the reason why the Debian developers have created a system that allows automatic or unattended installations starting from a configuration file (preseed).

  • Understanding Multipath TCP: High availability for endpoints and the networking highway of the future

    The days when you used a horse and buggy to travel to town along a dusty, wheel-rutted path are gone. Today’s roadways are complex, offering you many routes to the office, with High Occupancy Vehicle (HOV) lanes to help make your commute quicker. The evolution of networking is a bit like the explosive growth of our roadway systems. In the "olden" days of networking, connectivity was achieved using Transmission Control Protocol (TCP), a single path protocol much like that old bridleway that had grass poking up in the center. While today’s networks have multipath, super-highway, requirements—with mobile devices using multiple radio interfaces and datacenters and cloud deployments using redundant paths—these networks still primarily use single-path TCP as a transmission mechanism.

    But Multipath TCP (MPTCP) is zooming up the right lane and merging onto the scene. MPTCP is the highway of the future, offering you a way to supercharge your wireless, internet, and datacenter networks. However, the same features that make MPTCP so powerful also create some security challenges.

  • Random identity generation in Linux | Network World

    If you need to generate a list of names and addresses to test an application or a script that you're working on, Linux can make that surprisingly easy. There's a command called "rig" that will create name, address and phone number listings. As far as I can tell, out of the box, it only works with U.S. addresses and area codes. However, if this is indeed the case, you might be able to work around this problem.

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today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. 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 MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.

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