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today's howtos

Submitted by Roy Schestowitz on Friday 2nd of July 2021 07:11:08 AM Filed under
HowTos
  • Follower Reads

    When using the Leader and Followers pattern, it's possible that the leader may get overloaded if too many requests are sent to it. Furthermore in a multi-datacenter setup, where the client is in a remote datacenter, requests to the leader will be subject to additional latency.

  • Ansible might be running slow if libyaml is not available

    I first found out just how much slower Ansible can be without libyaml support when I was testing out Ansible 2.10 on a Raspberry Pi—which has a very slow microSD card as a boot volume. I opened the following GitHub issue to investigate: On systems with slow disks, Ansible 2.10 runs generally much slower than 2.9.

  • Create restricted user on Linux, home directory on encrypted partition

    Create a user that has the sole task to run some daemon that also needs to store files on disk. Starting and stopping daemon, as well as accessing these files, needs to be possible via ssh. Otherwise it should be locked down as far as possible.

  • Navigating the impact of Wi-Fi FragAttacks: users, developers and asset owners

    FragAttacks are a new collection of vulnerabilities affecting Wi-Fi devices, discovered and released by Mathy Vanhoef in May 2021. In this post, we will not dive into the technical details of the attacks – if you are interested, we highly recommend Mathy’s paper, which is an excellent technical read and does a great job of explaining the nitty-gritty details.

    Instead, we will focus on the exploitation requirements and concrete impact of these vulnerabilities, hoping to help users, developers, integrators and IT staff understand them better and take appropriate actions. If you are only interested in the “take home” message and actionable points feel free to skip to the Conclusion and Aftermath sections

  • How to Parse Command Line Arguments in Node.js

    Node.js is an event-based, open-source, and asynchronous I/O framework that uses Google’s V8 JavaScript engine. We use it to develop applications that use JavaScript both on the server and client sides. Node.js applications are written in JavaScript.

    Node.js applications also accept command-line arguments like any other programming language. By default, Node.js is able to handle your arguments but if you want some extra features then you can use third-party tools and packages like yargs and minimist. In this article, we will see how you can parse command line arguments in Node.js using process.argv, yargs, and minimist.

  • How to harden Docker images to enhance security

    Containers are becoming commonplace in data centers and cloud tenancies across the globe.

    With their surge in adoption, it is wise to handle these systems with a sense of security at the forefront. Whether you're developing containers for your company or deploying containers created by other teams, knowing how to harden these deployments is important.

    Let's look more closely at five ways to harden Docker images.

  • How to install an Auto Clicker on a Chromebook - for Linux Applications only

    Today we are looking at how to install an Auto Clicker on a Chromebook. It only works on Linux Applications in a Chromebook, sadly not in Play Store Applications, Google Chrome, or the rest of Chrome OS. Please follow the video/audio guide as a tutorial where we explain the process step by step and use the commands below.

  • How To Install MongoDB 4.0 on Ubuntu 18.04 - howtodojo

    In this tutorial, we will learn how to install MongoDB 4.0 on Ubuntu 18.04 LTS (Bionic Beaver). We will also learn to configure and secure our MongoDB 4.0 installation

  • How To Install MongoDB 4.4 on Ubuntu 18.04 - howtodojo

    In this tutorial, we will learn how to install MongoDB 4.4 on Ubuntu 18.04 LTS (Bionic Beaver). We will also learn to configure and secure our MongoDB 4.4 installation

  • What is DHCP and how to configure DHCP server in Linux

    DHCP is a networking protocol used to assign IP addresses to networked devices. In this guide, we'll introduce you to the protocol and explain how it works. You'll also see how to implement a DHCP server on Linux systems, and configure it for your own network.

  • Bind a cloud event to Knative | Opensource.com

    Events have become an essential piece of modern reactive systems. Indeed, events can be used to communicate from one service to another, trigger out-of-band processing, or send a payload to a service like Kafka. The problem is that event publishers may express event messages in any number of different ways, regardless of content. For example, some messages are payloads in JSON format to serialize and deserialize messages by application. Other applications use binary formats such as Avro and Protobuf to transport payloads with metadata. This is an issue when building an event-driven architecture that aims to easily integrate external systems and reduce the complexity of message transmission.

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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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