System & Network Admin

Learn what causes CPU and GPU bottlenecks, how to identify them, and practical fixes to balance performance. Includes tips for gaming, high-resolution tasks, and hardware upgrades.

Explains Linux command to check disk space to find disk space usage, estimate file space usage and more using the df, du and other CLI.

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libguestfs, library and tools for accessing and modifying VM disk images

I don’t have a boss. That’s not a brag, it’s a symptom. If I had one, I’d be canned before lunchtime, probably before I even logged in…

It should come as no surprise that the hacker community has embraced the Meshtastic project. It’s got a little bit of everything we hold dear: high quality open source software, fantastic doc…

Learn Linux basics with Bandit Level 0→1! Explore SSH, ls, cat, man pages, and file reading while uncovering Unix's history and secure access methods.

This is the first part of an experimental journey as I explore how many instances of my favorite IoT framework I can run on the 192 core Ampere One.

In this article, you'll find 11 of the best tools to create a bootable USB from an ISO image on Windows, Linux, and macOS – including Rufus, Etcher, and Ventoy.

Is your Linux system slow? Learn how to safely clear RAM cache, buffer, and swap space to instantly free up memory. Simple steps, no reboot required.

Learn how to create the non-existing target directory automatically when we copy files

Well, kind of the easy way. I honestly had better results using this appraoch than with the Terraform plugins available for Proxmox. The solution is to run QEMU commands directly in the proxmox node’s CLI and use a cloud-init OS image. The cloud-init images are typically in qcow2 storage format 1. I will be using the latest debian 12 Bookworm image from the official repo. wget https://cloud.debian.org/images/cloud/bookworm/latest/debian-12-generic-amd64.qcow2 Next, let’s create a virtual machine template with 2gb of memory and 2 cores and set networking to use the default bridge vmbr0.

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In this article, we will review some of the most used command-line tools and utilities for network management, troubleshooting and debugging in Linux.

Learn how to quickly compress an entire directory into a single tar file with the command line.

In this article, you'll learn how to use mkcert to generate locally trusted HTTPS certificates for local development environments in Linux.

Everything fails eventually, but moving parts fail fastest of all– and optical drives seemingly more than others, at least in our experience. Even when they work, vintage drives often have tr…

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Monitor your NUT server with a great web dashboard

Homebrew bills itself as the package manager MacOS never had (conveniently ignoring MacPorts) but they leave the PPC crowd criminally under-served, to say nothing of the 68k gang. Enter [that-ben] …

In this article, you’ll learn how to use sed and awk to parse, edit, and automate changes in Linux configuration files with simple examples.

Compile shell scripts to native self-contained executable programs

In this article, we will explain how to set a sudoers insult parameter for the sudo command to insult system users when they enter an incorrect password.

The Google Authenticator is an open-source module that includes implementations of one-time passcodes (TOTP) verification tokens developed by Google.

Home Manager is a system for managing a user environment using the Nix package manager. In other words, Home Manager lets you install software declaratively in your user profile, rather than using nix-env manage dotfiles in the home directory of your user. Home Manager has many options, which can look...

NixOS uses a declarative configuration system that allows users to manage their entire operating system setup including installed packages, system services, user accounts, hardware settings, and more through configuration files. This page serves as an overview of how to work with and manage NixOS system...