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today's howtos

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HowTos
  • Chromecast From a Linux PC – Allow Multicast on Firewall

    Google’s Chromecast is a great tool. I use it to cast a browser tab with stock updates to my TV while I work. However, if you are running a Linux PC you might have ran into the “No Devices Found” error. In this Linux quick tip we will show you how to connect to your Chromecast devices from Linux simply by allowing inbound multicast packets.

  • Using Wireshark to Examine FTP Traffic – Linux Hint

    The previous article has provided you with an in-depth understanding of the Wireshark filters, OSI layers, ICMP, and HTTP packet analysis. In this article, we will learn how FTP works and examine FTP Wireshark captures. Before we dig deep into the captured packet analysis, we will begin with a brief understanding of the protocol.

  • How to install Skin Mods in Friday Night Funkin on a Chromebook

    Today we are looking at how to install Skin Mods in Friday Night Funkin 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.

  • systemd application firewalls by example

    An application firewall, unlike a gateway (router) or system level firewall, is meant to limit the networking of a single application. It can be used to prevent a compromised service from seeing into the local network, prevent programs from calling home, plug metadata leaks, or more tightly control a program’s network access.

  • How to Install and Configure Rocket.Chat on CentOS 8

    In this tutorial, we’re going to show you how to install Rocket.Chat on a CentOS 8 server.

    Rocket.Chat is a great self-hosted alternative to Slack. You can even use it as a live chat for your website.

  • Fix Asus Linux laptop stuck at the logo screen

    Have you ever faced this issue where you successfully installed a Linux distribution on your Asus laptop (say Ubuntu), but when you boot your PC, it only shows a blank screen? If yes, this post is for you. We will give you a step-by-step procedure to fix the startup freeze and explain why it happens.

  • Tomas Tomecek: Automake in OpenShift

    It’s Friday evening, 19:00 (7pm) and I just spent more than an hour resolving a problem in anaconda. The problem was that builds sometimes failed with:

    /bin/sh: /sandcastle/docker-io-usercont-sandcastle-prod-20210212-101715691597/missing: No such file or directory
    The irony, right? A file called “missing” is actually missing.

    Luckily, I was successful and figured it out. Beer incoming.

  • Synchronize your 2FA Gmail with mbsync | FrostyX.cz

    In comparison to graphical email applications, configuring the command-line clients can be a needlessly painful experience. Not because of the client configuration itself but rather finding out the proper IMAP settings for your account. Personally, I spent more hours on moving my mail into Emacs (and previously into Mutt), than I care to admit. And in the end, it turned out that the only real obstacle was figuring out, how to get the freaking synchronization with Gmail working. Let me share my findings to potentially ease the pain for you.

  • Verify package GPG signature using DNSSEC | Miroslav Suchý

    When you want to be sure that RPM packages installed on your system were not altered, you should enable

    gpgcheck=1
    gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-$releasever-$basearch
    in your repo file or in dnf.conf. The problem is how to get the file on your disk the secure way?

    We have fedora-repos and distribution-gpg-keys. This will allow you to fetch new keys. But how to fetch the very first GPG key?

    You can either manually download, verify, and rpm --import that key. Fedora has a dedicated page for its GPG keys. This process is manual and boring. Can we utilize something which we can trust? What about DNS signed using DNSSEC?

    Can we put the GPG key in the DNS record and sign it using DNSSEC? We can trust this record and can safely import it.

    This is what Martin Sehnoutka has done in his master thesis Automatic verification of software packages with help of DNS. He even provided patches for DNF, created some DNS records, but then … things stalled. I picked it up a few days ago.

    Fedora now provides GPG keys for Fedora 27+ in DNS. Want to check it?

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

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.