Ubuntu Autoinstall
Author, validate, and debug Ubuntu Server autoinstall configuration (the Subiquity installer's `autoinstall:` schema, version 1) for Ubuntu Server LTS 24.04 and 26.04, focused on unattended on-premise and air-gapped installs — identity, storage (LVM/direct/ZFS/encryption/RAID), apt mirror-selection + proxy + offline fallback, ssh, packages, kernel, late-commands/early-commands, and zero-touch delivery via a NoCloud seed. The `network:` block is netplan v2 (use the ubuntu-netplan skill); the `user-data:` block is cloud-config for the installed system (use the ubuntu-cloud-init skill).
Security AStatic scan found no risk patternsHow grading works ›
From the source SKILL.md
Autoinstall is the configuration format for Ubuntu Server's Subiquity installer. A version: 1 document tells the installer how to partition, install, and configure the system unattended. This skill is authoring-led (produce a correct autoinstall config from a description) with a strong validation/debug path, aimed at unattended on-prem / air-gapped Ubuntu Server LTS installs.
What this skill does
Ubuntu Autoinstall is a community-contributed Claude Code skill in the security-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/ubuntu-autoinstall/ and loads when your prompt matches the skill's trigger.
Who uses this skill
The Ubuntu Autoinstall Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 156,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
How to install
Free
Manual install (2 steps)
mkdir -p ~/.claude/skills/ubuntu-autoinstall
curl -L https://claudskills.com/skills/ubuntu-autoinstall/SKILL.md \
-o ~/.claude/skills/ubuntu-autoinstall/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/ubuntu-autoinstall/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/ubuntu-autoinstall/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\ubuntu-autoinstall\SKILL.md on Windows. See the full install guide for step-by-step instructions.
Telegram
📱 Install from your phone or desktop Telegram
Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →
Pro
One-click install via the desktop app
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
Pro
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
Frequently asked questions
How do I install the Ubuntu Autoinstall Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy
SKILL.md from the source repository to
~/.claude/skills/ubuntu-autoinstall/SKILL.md and restart Claude Code. Both flows are detailed at
claudskills.com/install/.
What does the Ubuntu Autoinstall skill do?
Author, validate, and debug Ubuntu Server autoinstall configuration (the Subiquity installer's `autoinstall:` schema, version 1) for Ubuntu Server LTS 24.04 and 26.04, focused on unattended on-premise and air-gapped installs — identity, storage (LVM/direct/ZFS/encryption/RAID), apt mirror-selection + proxy + offline fallback, ssh, packages, kernel, late-commands/early-commands, and zero-touch delivery via a NoCloud seed. The `network:` block is netplan v2 (use the ubuntu-netplan skill); the `user-data:` block is cloud-config for the installed system (use the ubuntu-cloud-init skill).
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Ubuntu Autoinstall skill?
Use Ubuntu Autoinstall when your Claude Code task falls under the Security category — specifically in the security misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Ubuntu Autoinstall" or describe the task and let Claude pick). Browse related skills at
/category/security/.
What is a Claude Code skill and how does the Ubuntu Autoinstall skill fit in?
A Claude Code skill is a
SKILL.md file that lives under
~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Ubuntu Autoinstall is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at
/learn/what-is-a-claude-skill/.
Attribution & license
Cite this skill
If you reference this skill in a blog post, paper, or documentation, you can cite it as:
APA
air-gapped. (2026). Ubuntu Autoinstall [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/ubuntu-autoinstall/
BibTeX
@misc{ubuntu-autoinstall-2026,
author = {air-gapped},
title = {Ubuntu Autoinstall [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/ubuntu-autoinstall/}
}Embed this skill
Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →
Badge
[](https://claudskills.com/skills/ubuntu-autoinstall/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)
<script>
<script src="https://claudskills.com/embed/ubuntu-autoinstall.js" async></script>
<iframe>
<iframe src="https://claudskills.com/embed/ubuntu-autoinstall.html" width="100%" height="160" frameborder="0" loading="lazy" title="ClaudSkills: Ubuntu Autoinstall"></iframe>
Security scan
Grade A · scanned 2026-07-21 — free static scan against the OWASP Agentic Skills Top 10.
No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›
- ✓ Prompt injection
- ✓ Data exfiltration
- ✓ Supply chain
- ✓ Reverse shell
- ✓ Credentials
- ✓ Execution
- ✓ Filesystem
- ✓ Persistence
- ✓ Obfuscation
- ✓ Network
Show this grade on your repo (click to copy):
[](https://claudskills.com/skills/ubuntu-autoinstall/#security)
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