A server without monitoring only tells you it is down when someone complains. With Node Exporter, each host exposes Linux metrics; Prometheus collects and stores them as time series for queries and alerts. This guide uses Ubuntu packages where available, avoids exposing metrics to the internet, and validates each step before continuing. The … Read more
Running AI models locally is no longer just a laboratory activity: with Ollama, you download and run LLMs on your own Linux machine without sending data to the cloud or paying per token. This post explains where the project came from — its origin explains much of its design — and shows how … Read more
The current generation of AI assistants has moved out of the browser and into the terminal — where sysadmins and developers actually work. They read files, explain errors, write scripts, and execute commands with your approval. This post is the updated September 2026 guide: what exists, how to install each one, and … Read more
Complete and tested Ansible project: inventory with groups, ufw, Nginx with template and handler that tests the configuration, password in ansible-vault and rolling update that stops by itself if a server doesn't come back.
Like it or not, systemd is the init system of virtually every current distribution — Ubuntu, Debian, Fedora, Arch, openSUSE. Mastering half a dozen commands handles 90% of everyday service management. Here are the essentials, straight to the point. Managing services systemctl status nginx # status, PID, last log lines sudo systemctl … Read more
On 28 July 2025, a researcher from the University of Utah was cleaning out a storage room when he found a nine-track magnetic tape whose label read UNIX version 4. Until then, only the manual had survived from that version of 1973. … Read more
Before Linux, Windows, and macOS became the desktop landscape, an operating system meant a technician flipping switches on a mainframe. From 1969 to 2026, the history forms a tree: Unix, DOS, Xerox GUIs, Linus’s kernel, … Read more
Visual Studio Code is the world’s most widely used editor, runs well on Linux, and is free. This guide shows how to install it so it stays up to date automatically, what to do right afterward, and what the difference is … Read more
Want to try Swift on Linux without starting a huge project? Let's install the language using the official method from swift.org, run a Hello World, generate a binary, and put together a small terminal tool with arguments. The goal is to leave … Read more
Open any Linux server and you will find five different languages running at the same time, unaware of each other. The kernel is C. docker and kubectl are Go. The help desk dashboard is PHP — or Perl, … Read more
