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today's howtos

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  • Cockpit Project: Setting up PCP and Grafana metrics with Cockpit

    Finding performance problems is a common troubleshooting activity. Monitoring the usage of CPU, memory, network, and other resources helps administrators to spot patterns when unusual resource usage occurs.

  • System Calls in Linux

    System calls are a special set of procedures that regular programs (user space processes) can submit to the Linux kernel for working with files, interacting with hardware, accessing internal OS functionality, implement all sorts of communication and process management and basically do anything else that’s sensitive or performance critical enough that OS kernel must enforce strict controls around it.

    Regular processes interface with the OS kernel by supplying a system call name and parameters, the kernel then verifies validity of a system call and executes it within kernel space, returning data and execution status back.

  • [Short Tip] Access system variables in Nushell

    Working with variables in Nushell works mostly like you would expect it. If you want to define a variable, you need the keyword let...

  • How to Install and Use GIMP on Ubuntu

    One thing that users really love about Linux is its open-source development culture. Even if you can't afford to splurge your money on high-end close-sourced software, you don't have to settle with substandard products. The open-source community ensures that by developing and releasing free apps.

    One such app is GIMP, short for GNU Image Manipulation. With GIMP installed on your Ubuntu machine, you can handle all, if not most, of your tasks related to images—including everything from super easy stuff like capturing screenshots and cropping images to more heavy-duty things such as image creation, animation, scripting support, and more.

  • How to query packages information with the rpm package manager

    RPM is the recursive acronym for RPM Package Manager: it is the default low level package manager in some of the most famous and most used Linux distributions, such as Fedora, Red Hat Enterprise Linux, CentOS, OpenSUSE and their derivatives. The software, as you can expect, is free and open source; when invoked with the -q option it can be used to query packages to retrieve specific information, such as dependencies, recommendations, files etc. In this tutorial we learn how to perform such queries.

  • How To Install Foreman on AlmaLinux 8 - idroot

    In this tutorial, we will show you how to install Foreman on AlmaLinux 8. For those of you who didn’t know, Foreman is a free and open-source tool for automating the provisioning and configuration of Linux systems. Foreman gives system administrators the power to easily automate repetitive tasks, quickly deploy applications, and proactively manage servers, on-premise or in the cloud. Foreman also integrated with configuration management tools such as Ansible, Chef, Salt, and Puppet, available as plugins to deliver a complete infrastructure lifecycle management.

    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 Foreman on AlmaLinux 8. You can follow the same instructions for Rocky Linux.

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.