administering-linux SKILL.md skillA
This file is byte-identical to the first copy the registry indexed, one of 3 indexed copies. Same content hash, so the same checks give both the same grade.
administering-linux from nordz0r/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nordz0r/skills/administering-linux@git:20261013.df0a08fPins git:20261013.df0a08f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nordz0r/skills
- Path
plugins/infra-linux/skills/administering-linux/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261013.df0a08f, committed Oct 13, 2026
- First version recorded
- Sep 2, 2026
- Size
- 2,758 bytes
- Repository stars
- 8
- License
- none declared
Hands-on Linux administration of a systemd host: journalctl, systemctl, unit, drop-in, failed-service after reboot, OOM, df, ssh, Ubuntu Debian. Not Docker and not Ansible. Triggers: journalctl, unit file, drop-in, oom killer, disk full, sshd, ubuntu server, failed unit, vendor unit, host troubleshooting, сервер, диск заполнен, служба не стартует, логи, линукс.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Administering Linux Working skill for operating a Linux server. The goal is to fix the host with commands that can be copied, not to retell man pages. Do not use this skill as the primary one for Docker, GitLab CI, Ansible, Amnezia or policy routing: they have their own skills (`docker-ops`, `gitlab-ci`, `ansible-playbook`, `amnezia-vpn`, `linux-routing`). ## When to use - A service does not start, crashes, does not listen on its port, does not come up after reboot. - You need a unit file, timer, drop-in override, logrotate. - CPU/RAM/IO/disk full/OOM/load analysis. - Users, sudo, SSH, packages, basic firewall. - "Why is the host slow / refusing logins / not resolving DNS". ## Workflow 1. Pin down the distro and the host's role: `source /etc/os-release; hostnamectl; uptime`. 2. Isolate the symptom: service, disk, memory, network, auth. 3. Look at facts, not hypotheses: `systemctl --failed`, `journalctl -xe`, `df -h`, `free -h`, `ss -lntup`. 4. Change one layer at a time. For unit files use a drop-in; do not edit the vendor unit. 5. After the fix verify: service status, port, log, reboot persistence (`enable`). ## Quick facts ```bash source /etc/os-release …
Read the whole file at its exact version.
How to install
mdr add nordz0r/skills/administering-linux@sha256:5ce197ef77014106The line at the top of this page pins the label git:20261013.df0a08f, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_jm35ingixdiojpnf)
0 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Sep 2, 2026 and Oct 13, 2026, about one every 21 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261013.df0a08f latest | 2026-10-13 | df0a08f | 2,758 B | A | view · diff |
| git:20260919.c5defa2 | 2026-09-19 | c5defa2 | 3,142 B | A | view · diff |
| git:20260902.6c69dd7 | 2026-09-02 | 6c69dd7 | 3,473 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2758 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
nordz0r/skills · 8 stars · license none declared · pushed 2026-10-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_jm35ingixdiojpnf GET https://markdownregistry.com/api/v1/resolve?ref=nordz0r/skills/administering-linux GET https://markdownregistry.com/api/v1/blob/5ce197ef7701410618ce530e997c7ba28b18cbe0abf87a8dded08eadd1a6cf61
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.