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linux-pro

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Linux systems guidance — filesystem, permissions, processes, networking, logs, and production server administration.

skills/linux-pro/SKILL.md

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Oct 10, 2026
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## Overview

Linux is the substrate everything runs on: containers, VMs, CI runners, and most servers. Fluency with the filesystem, permissions, processes, networking, and logs is what separates engineers who guess from engineers who diagnose. You don't need to be a sysadmin — you need the working knowledge that makes every other skill more effective.

This skill covers the Linux fundamentals that come up constantly: navigating and managing systems, understanding permissions, controlling processes, debugging networking, reading logs, and the production practices (users, SSH, updates, backups) that keep servers healthy.

## When to use

- Diagnosing server issues (disk full, OOM, high load, network).
- Managing files, permissions, and ownership.
- Controlling processes and services.
- Debugging networking (DNS, ports, firewalls, routing).
- Reading and managing logs (journald, logrotate).
- Setting up a production Linux server (users, SSH, updates).
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