Secure Boot Cert Rotation

Q: What is a Claude Code skill and how does the Secure Boot Cert Rotation 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. Secure Boot Cert Rotation is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: General · Sub-category: general-misc · Last updated: 2026-07-21

Triage and remediate the Microsoft Secure Boot 2011→2023 UEFI certificate rotation (CAs expiring June/October 2026) across Dell PowerEdge / iDRAC9 bare metal, Ubuntu/Linux servers, and Harvester HCI / KubeVirt guest VMs. Establishes the load-bearing fact that UEFI firmware ignores certificate expiry — nothing stops booting on the deadline; the real risk is forward-compat once a 2023-only-signed shim arrives, plus a dbx/revocation freeze — then routes to the cleanest per-platform fix: iDRAC BIOS-staged keys applied on reboot (Dell), fwupd-free manual `db` append that self-authenticates via the existing 2011 KEK (Linux), and the Harvester virt-launcher OVMF floor (v1.6.0) with ephemeral-vs-persistent NVRAM triage (VMs). Covers the PK→KEK→db trust chain, why no generic Microsoft 2023 KEK payload exists, and audit via mokutil / efi-readvar / racadm bioscert / Redfish.

Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

Triage and fix the Microsoft Secure Boot 2011→2023 certificate rotation on a real, mixed fleet. Microsoft's original 2011 Secure Boot CAs expire in 2026; their 2023 replacements take over. This skill exists to stop the two failure modes operators actually hit: (1) panic — believing servers will stop booting on the expiry date (they won't), and (2) applying the wrong tool — reaching for fwupd/LVFS on hardware and VMs it cannot serve, instead of the firmware-native path.

What this skill does

Secure Boot Cert Rotation is a community-contributed Claude Code skill in the general-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/secure-boot-cert-rotation/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Secure Boot Cert Rotation Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 196,000+ 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/secure-boot-cert-rotation
curl -L https://claudskills.com/skills/secure-boot-cert-rotation/SKILL.md \
  -o ~/.claude/skills/secure-boot-cert-rotation/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/secure-boot-cert-rotation/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/secure-boot-cert-rotation/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\secure-boot-cert-rotation\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 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.

See pricing → Download desktop app

Frequently asked questions

How do I install the Secure Boot Cert Rotation Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/secure-boot-cert-rotation/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Secure Boot Cert Rotation skill do?

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 Secure Boot Cert Rotation skill?

Use Secure Boot Cert Rotation when your Claude Code task falls under the General category — specifically in the general 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 Secure Boot Cert Rotation" or describe the task and let Claude pick). Browse related skills at /category/general/.

What is a Claude Code skill and how does the Secure Boot Cert Rotation 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. Secure Boot Cert Rotation is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/air-gapped/skills/blob/HEAD/.claude/skills/secure-boot-cert-rotation/SKILL.md
License: MIT
Author: air-gapped

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

air-gapped. (2026). Secure Boot Cert Rotation [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/secure-boot-cert-rotation/

BibTeX

@misc{secure-boot-cert-rotation-2026,
  author    = {air-gapped},
  title     = {Secure Boot Cert Rotation [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/secure-boot-cert-rotation/}
}

Embed this skill

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Badge

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Security scan

Grade A · scanned 2026-09-28 — 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):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/secure-boot-cert-rotation/#security)

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