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today's howtos

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  • How To Install Apache Cassandra on Debian 11 - idroot

    In this tutorial, we will show you how to install Apache Cassandra on Debian 11. For those of you who didn’t know, Apache Cassandra is a NoSQL database used for storing large amounts of data. It has a distributed architecture and is designed to manage large volumes of data with dynamic replication. It is used by many large companies like Github, NetFlix, Reddit, and Instagram.

    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 Cassandra open source NoSQL database on a Debian 11 (Bullseye).

  • Adam Young: Ironic Clean PXE failure

    One of our ironic baremetal nodes was suffering a cleaing failure. Fixing it was easy…once we knew the cause/

    Cleaning is a process by which ironic prepares a node for use. It removes old data and configuration from a node. In order to do that, it has to run a simple image. We use a Debian based image, known as the IPA image, as it runs the Ironic Python Agent. This image is installed via PXE boot. So, if the PXE setup is broken, the node can’t be cleaned.

  • Fixed wait for kernel video modules to load

    The pups have, I think, "udevadm settle" in /etc/rc.d/rc.sysinit, which waits for all kernel drivers to load before continuing. However, attempting to get to the desktop quicker, EasyOS does not have this, instead waits for the kernel video module(s) to load before bringing up the desktop. That is, EasyOS does not wait for all modules to load, just enough to bring up the Xorg desktop.

  • How to Monitor IT Infrastructure using Checkmk -

    In this tutorial, you will learn how to monitor IT infrastructure using Checkmk. Checkmk is a free and Open Source IT infrastructure monitoring tool, alternative to Nagios. It provides a powerful monitoring of networks, servers, clouds, containers and applications. Fast. Effective.

  • How to use TOP command - Unixcop

    Administrators should know what processes are running and the consumption of each of them.

    That’s why you need tools to help you to monitor your system and watch the utilization of it, and as a result you tune your system better to make greater use of it by killing unneeded processes or give priority to the important ones.

    One of the tools (commands) to do so is TOP command and this article is for how to use TOP command in your Linux-based system.

    There are lots of commands that help you monitor your system, as an example there is PS, but the different here is that PS is for non-interactive monitoring.

  • How To Install ownCloud on Linux Mint 20 - idroot

    In this tutorial, we will show you how to install ownCloud on Linux Mint 20. For those of you who didn’t know, ownCloud is an open-source, self-hosted file sync and file share platform, similar to Dropbox, Microsoft OneDrive, and Google Drive. It works with various database management systems such as MySQL, PostgreSQL, or MariaDB. It maintains the synchronization with all the computers either it is a window-based or Linux-based operating system.

    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 ownCloud self-hosted file sync on a Linux Mint 20 (Ulyana).

  • How to fix broken video

    I decided to write this tutorial in the first-person, so as to more easily relate my personal experiences with video setup. All of my computers, for the last several years, have been all-Intel GPUs (Graphical Processing Units, that is, the video chip). However, just recently I acquired a Nvidia GeForce 210 (GT218 GPU) video card, and that's when I discovered how much "fun" it is to get Nvidia cards to work! Here is a blog post about that video card:

  • Use External Labels with Prometheus Alerts

    I’ve recently deployed the second Kubernetes cluster into the homelab environment, and realised that if I send alerts to the same Slack channel, I can’t tell which environment the alert somes from. I therefore need a way to identify the cluster that fires the alerts, ideally getting the cluster name passed to Alertmanager.

  • 4 Ways to Check MySQL or MariaDB version on Linux - Linux Shout

    This tutorial will let you know the key commands or ways we can use to check the MySQL or MariaDB Database server version running on Linux operating systems such as Debian, Ubuntu, CentOS, Rocky Linux, AlmaLinux, and more.

    If you have already done the installation of MySQL or MariaDB server on your Linux. Then now you probably have a question about how to check which version you are actually using?

    Also, MySQL is one of the popular and most common database servers using around the world to store data. However, don’t be confused between MySQL and MariaDB because the latter one is the fork of MySQL, nothing more than that. Hence, the commands used for Oracle MySQL will also be applicable for MariaDB.

More in Tux Machines

Open source mind mapping with

There's something special about maps. I remember opening the front book cover of JRR Tolkien's The Hobbit when I was younger, staring at the hand-drawn map of Middle Earth, and feeling the wealth of possibility contained in the simple drawing. Aside from their obvious purpose of actually describing where things are in relation to other things, I think maps do a great job of expressing potential. You could step outside and take the road this way or that way, and if you do, just think of all the new and exciting things you'll be able to see. Read more

19 Absolute Simple Things About Linux Terminal Every Ubuntu User Should Know

Terminal often intimidates new users. However, once you get to know it, you gradually start liking it. Well, that happens with most Linux users. Even if you are using Ubuntu as a desktop system, you may have to enter the terminal at times. New users are often clueless about many things. Some knowledge of basic Linux commands always helps in such cases but this article is not about that. This article focuses on explaining small, basic and often ignored things about using the terminal. This should help new Ubuntu desktop users to know the terminal and use it with slightly more efficiency. Read more

EndeavourOS 21.4 Review [Atlantis] - Pure Arch Linux Experience for You

We review the EndeavourOS 21.4 (Atlantis) — the best Arch Linux flavor for beginners. Read more

today's leftovers

  • Mesa's Classic Drivers Have Been Retired - Affecting ATI R100/R200 & More - Phoronix

    The day has finally come that Mesa's classic OpenGL drivers (non-Gallium3D) have been cleared out of the code-base as part of their modernization effort for mainline. After a half-year pending, the "Delete Mesa Classic" merge request was honored today in eliminating the Mesa "classic" OpenGL drivers from the code-base. The drivers will still be maintained in an "Amber" branch, but considering how little focus these drivers have been receiving by upstream Mesa developers currently, don't expect much (or, if any) real changes moving ahead.

  • Steam support for Chromebooks could surface this week

    After months and months and even more months of waiting, it appears that we may finally get our first look at native Steam gaming on Chrome OS in the very near future. Affectionately known as project ‘Borealis’, the containerized version of Steam has been in the works for nearly two years and it was initially thought that Google was targeting mid to late 2022 for a release. With Chrome OS 96 just rolling out and the next iteration of Google’s desktop operating system not due until January of 2022, it’s fairly clear that this target was missed but that’s okay. I’d rather see a fully baked product released than a buggy piece of software that sours users to Chrome OS. Anyway, in its early development, I presumed that ‘Borealis’, a.k.a. Steam on Chrome OS, would simply be an optimized version of the Steam application that would install and run inside the current Linux container. Over time, we learned that Google was actually creating an entirely new container designed specifically to house Borealis and that it should run independently from the Debian container currently available in Stable Chrome OS. This makes more sense as Google can retain control of the Borealis container and keep it neat and clean for running Steam. Presumably, users will never actually interact with the container like you can with the Linux terminal.

  • iXsystems Recognized in 11th Annual Best in Biz Awards for Most Innovative Product Line of the Year

    TrueNAS by iXsystems is the world’s most popular Open Source storage operating system and is the most efficient solution for managing and sharing data over a network. TrueNAS Open Storage provides unified storage for file, block, object, and application data – making it an exceptionally flexible storage platform for business. All TrueNAS editions -- CORE, Enterprise, and SCALE -- leverage the enterprise-grade OpenZFS file system to provide an all-inclusive data management solution that protects customer data with features like Copy-on-Write, Snapshots, Checksums, Scrubbing, and 2-Copy Metadata.