New: 97,000+ skills indexed from GitHub repos with 100+ stars · every skill safety-checkedBrowse top skillsTop skills
Esc to closeBrowse all skills
Submit a skillBrowse skills
Submit a skillBrowse skills

Agent skill

Sysadmin

by RightNow-AI in RightNow-AI/openfang

System administration expert for Linux, macOS, Windows, services, and monitoring

Apache-2.0Auto-check: warningsDevOps & Cloud

Install Sysadmin

The automated check flagged lines worth reading first. See the safety section below.

skills CLI
$ npx skills add RightNow-AI/openfang --skill sysadmin -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install RightNow-AI/openfang sysadmin --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/RightNow-AI/openfang.git skills-src && mkdir -p .claude/skills && cp -r skills-src/crates/openfang-skills/bundled/sysadmin .claude/skills/sysadmin && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
sysadmin
GitHub stars
18k
Token cost
~631 tokens
SKILL.md length
294 words
Files
1
Skills in repo
68
Repo updated
First seen
Licence
Apache-2.0

At a glance

System administration expert for Linux, macOS, Windows, services, and monitoring

  • Tasks that involve Linux administration
  • SKILL.md covers Key Principles, Diagnostics, Service Management and Security Hardening, plus 1 more section
  • Calls curl, apt and yum

What it does

Sysadmin is an agent skill from RightNow-AI/openfang. System administration expert for Linux, macOS, Windows, services, and monitoring

Its SKILL.md is about 630 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in DevOps & Cloud, covering Linux administration. It works with Linux and macOS. The repository describes itself as: Open-source Agent Operating System. The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve Linux administration

Example prompts

  • “/sysadmin”

What it can do on your machine

Read from SKILL.md and the folder at commit acf2587. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • curl
    • apt
    • yum
    • brew
    • bash

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use curl, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Sysadmin loads about 631 tokens when it runs. Until then it costs about 22 tokens; SKILL.md has 294 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~22
When it runs · the whole SKILL.md, loaded when a task matches
~631

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: warnings

The automated check found patterns that need a careful read before installing.

  • WarningPipes a downloaded script straight into a shellSKILL.md:44
    e internet without reading them first (`curl | bash` is risky).

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from RightNow-AI/openfang at commit acf2587, republished under its Apache-2.0 licence (© RightNow-AI). 294 words, ~631 tokens.

Download SKILL.mdSave it as .claude/skills/sysadmin/SKILL.md (or your agent's skills folder).
name
sysadmin
description
System administration expert for Linux, macOS, Windows, services, and monitoring

System Administration Expert

You are a system administration specialist. You help users manage servers, configure services, troubleshoot system issues, and maintain healthy infrastructure across Linux, macOS, and Windows.

Key Principles

  • Always identify the operating system and version before suggesting commands — syntax differs between distributions and platforms.
  • Prefer non-destructive diagnostic commands first. Never run destructive operations without confirmation.
  • Explain the "why" behind each command, not just the "what." Users should understand what they are executing.
  • Always back up configuration files before modifying them: cp file file.bak.$(date +%Y%m%d).

Diagnostics

  • CPU/Memory: top, htop, vmstat, free -h (Linux); Activity Monitor or vm_stat (macOS); taskmgr, Get-Process (Windows).
  • Disk: df -h, du -sh *, lsblk, iostat (Linux); diskutil list (macOS); Get-Volume (Windows).
  • Network: ss -tlnp or netstat -tlnp, ip addr, ping, traceroute, dig, curl -v.
  • Logs: journalctl -u service-name --since "1 hour ago" (systemd), tail -f /var/log/syslog, dmesg.
  • Processes: ps aux, pgrep, strace -p PID (Linux), dtruss (macOS).

Service Management

  • systemd (most modern Linux): systemctl start|stop|restart|status|enable|disable service-name.
  • launchd (macOS): launchctl load|unload /Library/LaunchDaemons/plist-file.
  • Always check service status and logs after making changes.
  • Use systemctl list-units --failed to find broken services.

Security Hardening

  • Disable root SSH login. Use key-based authentication only.
  • Configure ufw or iptables/nftables to allow only necessary ports.
  • Keep systems updated: apt update && apt upgrade, yum update, brew upgrade.
  • Use fail2ban to protect against brute-force attacks.
  • Audit running services with ss -tlnp and disable anything unnecessary.

Pitfalls to Avoid

  • Never run chmod -R 777 — it is a security disaster. Use the minimum permissions needed.
  • Never edit /etc/sudoers directly — always use visudo.
  • Do not kill processes blindly with kill -9 — try SIGTERM first, then escalate.
  • Avoid running untrusted scripts from the internet without reading them first (curl | bash is risky).
  • Do not disable SELinux/AppArmor to "fix" permission issues — investigate the policy instead.

© RightNow-AI, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in crates/openfang-skills/bundled/sysadmin of RightNow-AI/openfang.

Open the folder on GitHubat commit acf2587

Compare with similar skills

Sysadmin next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Sysadmin compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Sysadmin this skillRightNow-AI/openfang18k—~631Automated safety check: WarnApache-2.0
Agent Chatprofbernardoj/everclaw-community-branches112—~2.2kAutomated safety check: NotesMIT
Install Watchdogathola/claude-night-market342—~837Automated safety check: PassMIT
Computer Repair88lin/computer-repair-skill3481 repos~1.2kAutomated safety check: WarnAGPL-3.0
Shadowvpn Deploy Clientmadeye/shadowvpn101—~2.4kAutomated safety check: NotesMIT
Openbkn Deployopenbkn-ai/bkn-foundry629—~1.9kAutomated safety check: NotesCustom licence

Similar skills

  • Agent Chat

    profbernardoj/everclaw-community-branches

    XMTP real-time agent-to-agent and user-to-agent encrypted messaging daemon for EverClaw.

    112 GitHub stars~2.2k tokensUpdated 1 mo ago
    DevOps & CloudAuto-check: notes

  • Install Watchdog

    athola/claude-night-market

    Installs egregore watchdog daemon via launchd or systemd for autonomous relaunching.

    342 GitHub stars~837 tokensUpdated yesterday
    DevOps & CloudAuto-check passed

  • Computer Repair

    88lin/computer-repair-skill

    Diagnoses and repairs Windows, macOS and Linux computers with evidence first, a confirmed plan, minimal changes and verification, using on-demand playbooks.

    348 GitHub starsUsed in 1 repo~1.2k tokens
    DevOps & CloudAuto-check: warnings

  • Shadowvpn Deploy Client

    madeye/shadowvpn

    Deploy, install, and run the ShadowVPN client in a target environment — Linux (systemd), macOS (launchd), or Windows (Wintun, foreground launcher or scheduled-task service).

    101 GitHub stars~2.4k tokensUpdated 1 mo ago
    Productivity & AutomationAuto-check: notes

  • Openbkn Deploy

    openbkn-ai/bkn-foundry

    Deploy or upgrade OpenBKN on a customer-authorized Linux server through the repository's deploy scripts, with preflight checks, explicit confirmation, secret handling, and post-deployment…

    629 GitHub stars~1.9k tokensUpdated today
    DevOps & CloudAuto-check: notes

  • Aliyun Swas Manage

    cinience/alicloud-skills

    A skill your agent uses when managing Alibaba Cloud Simple Application Server (SWAS OpenAPI 2020-06-01) resources end-to-end, including querying instances, starting/stopping/rebooting, executing…

    397 GitHub starsUsed in 1 repo~1.9k tokens
    DevOps & CloudAuto-check passed

More from RightNow-AI/openfang

All 68 skills in this repo

  • Playwright Browser Automation Patterns

    RightNow-AI/openfang

    Reference of CSS selectors, step-by-step web workflows and error recovery tactics for an agent that browses, fills forms and compares prices on live sites.

    18k GitHub stars~1k tokensUpdated 3 mo ago
    Auto-check passed

  • Intelligence Collection Methodology

    RightNow-AI/openfang

    Reference knowledge for open-source intelligence collection: the collection cycle, source reliability tiers, search query patterns and entity extraction.

    18k GitHub stars~2.1k tokensUpdated 3 mo ago
    Auto-check passed

  • Lead Generation Research Guide

    RightNow-AI/openfang

    Reference knowledge for AI lead generation: building an ideal customer profile, researching prospects on the web, enriching lead records and finding email formats.

    18k GitHub stars~1.8k tokensUpdated 3 mo ago
    Auto-check passed

  • Video Clipping Reference

    RightNow-AI/openfang

    Command reference for cutting clips from online video: yt-dlp downloads, whisper transcription, SRT subtitle files and ffmpeg processing, with Windows, macOS and Linux differences.

    18k GitHub stars~4.1k tokensUpdated 3 mo ago
    Auto-check: warnings

  • Forecasting Expert Knowledge

    RightNow-AI/openfang

    Reference knowledge for AI forecasting: superforecasting principles, a signal taxonomy, confidence calibration rules and reasoning chains for making and tracking predictions.

    18k GitHub stars~2.5k tokensUpdated 3 mo ago
    Auto-check passed

  • Deep Research Methodology

    RightNow-AI/openfang

    Reference knowledge for AI deep research: a five-phase process, strategies by question type, CRAAP source scoring, cross-referencing, synthesis and citation formats.

    18k GitHub stars~2.6k tokensUpdated 3 mo ago
    Auto-check passed

Works with

Categories

Questions about Sysadmin

What does Sysadmin do?

System administration expert for Linux, macOS, Windows, services, and monitoring. Sysadmin is an agent skill from RightNow-AI/openfang.

When should I use Sysadmin?

Sysadmin fits situations like: tasks that involve Linux administration.

How do I install Sysadmin in Claude Code?

Run `npx skills add RightNow-AI/openfang --skill sysadmin -a claude-code`. Or copy the skill folder (crates/openfang-skills/bundled/sysadmin in RightNow-AI/openfang) into .claude/skills/sysadmin in your project. Claude Code loads it when a task matches its description.

How do I install Sysadmin in Codex?

Run `npx skills add RightNow-AI/openfang --skill sysadmin -a codex`. Or copy the skill folder (crates/openfang-skills/bundled/sysadmin in RightNow-AI/openfang) into .agents/skills/sysadmin in your project. Codex loads it when a task matches its description.

Can I use Sysadmin in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add RightNow-AI/openfang --skill sysadmin -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/sysadmin, .gemini/skills/sysadmin, .github/skills/sysadmin and .opencode/skills/sysadmin in your project.

What does Sysadmin need to run?

Going by SKILL.md and its folder, Sysadmin needs the command-line tools its instructions call (curl, apt, yum, brew and bash).

Does Sysadmin access the network?

SKILL.md contains no URLs. Its commands use curl, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Sysadmin safe to install?

Our automated static check of SKILL.md flagged 1 warning(s): pipes a downloaded script straight into a shell. Read the flagged lines before installing; the check is not a guarantee either way.

What licence does Sysadmin use?

Sysadmin is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Sysadmin use?

About 631 tokens (SKILL.md is roughly 2.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Sysadmin?

Skills that share tags, products or a category with Sysadmin: Agent Chat (profbernardoj/everclaw-community-branches, 112 stars), Install Watchdog (athola/claude-night-market, 342 stars), Computer Repair (88lin/computer-repair-skill, 348 stars) and Shadowvpn Deploy Client (madeye/shadowvpn, 101 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Sysadmin?

RightNow-AI (a GitHub organization) maintains it in RightNow-AI/openfang, which has 18,212 GitHub stars. The repository holds 68 skills in this directory. The repository was last updated on July 2, 2026.

Source: RightNow-AI/openfang on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.