Harden Ubuntu/Debian cloud servers with SSH key authentication, UFW firewall, fail2ban, and unattended upgrades.
Andromity loads skills from folders you trust. Install with andromity skill install linux-server-hardening — autonomy and approval limits stay configurable per session.
# Install the "Linux VPS & Server Hardening" skill You are installing an AgenticMarket skill into this workspace. Follow these steps exactly. ## 1. Detect your environment and choose the destination file - Andromity: `.andromity/skills/linux-server-hardening/SKILL.md` (or user scope `~/.andromity/skills/linux-server-hardening/SKILL.md`) - Antigravity / Gemini CLI: `.agent/skills/linux-server-hardening/SKILL.md` - Cursor: `.cursor/rules/linux-server-hardening.mdc` - Claude Code: append to `CLAUDE.md` (or `.claude/skills/linux-server-hardening.md`) - Windsurf: append to `.windsurfrules` - Cline / Roo Code: `.clinerules/linux-server-hardening.md` - GitHub Copilot: append to `.github/copilot-instructions.md` - ChatGPT / web only: paste the content into Custom Instructions - Any other agent: save to `.agent/skills/linux-server-hardening/SKILL.md` ## 2. Create the destination file - Preserve every existing file and configuration entry. - Create parent folders as needed. - Never overwrite unrelated content. ## 3. Write exactly this content ```markdown --- name: linux-server-hardening description: "Harden Ubuntu/Debian cloud servers with SSH key authentication, UFW firewall, fail2ban, and unattended upgrades." author: community license: mit version: 1.0.0 --- # Linux Server Hardening Production server security baseline: 1. Disable SSH password authentication and root login: `PasswordAuthentication no`, `PermitRootLogin no`. 2. Configure UFW firewall allowing only ports 22, 80, and 443. 3. Install and configure `fail2ban` to block brute-force attempts. 4. Enable automatic security updates with `unattended-upgrades`. ``` ## 4. Verify - Confirm the file exists and is readable. - Report the destination path and confirm the "Linux VPS & Server Hardening" skill is installed and active. Skill metadata: - Slug: linux-server-hardening - Category: security - License: mit - Source: AgenticMarket
Production server security baseline:
AgenticMarketPasswordAuthentication no, PermitRootLogin no.fail2ban to block brute-force attempts.unattended-upgrades.Harden Ubuntu/Debian cloud servers with SSH key authentication, UFW firewall, fail2ban, and unattended upgrades.
Linux VPS & Server Hardening works seamlessly with Cursor (.cursor/rules), Claude Code (CLAUDE.md & .claude/skills), Windsurf (.windsurfrules), Google Antigravity (.agent/skills), Andromity (.andromity/skills), and Cline.
Click '1-Click Prompt Install' in the right sidebar or copy the prompt into your agent chat (Cursor Composer, Claude Code, or Andromity). The agent automatically configures the skill instruction file into your workspace.
Yes, Linux VPS & Server Hardening is 100% free and open-source under the mit license on AgenticMarket with no per-call fees or paywalls.
Guide users through a structured workflow for co-authoring documentation. Use when user wants to write documentation, proposals, technical specs, decision docs, or similar structured content. This workflow helps users efficiently transfer context, refine content through iteration, and verify the doc works for readers. Trigger when user mentions writing docs, creating proposals, drafting specs, or similar documentation tasks.
Use this skill whenever the user wants to do anything with PDF files. This includes reading or extracting text/tables from PDFs, combining or merging multiple PDFs into one, splitting PDFs apart, rotating pages, adding watermarks, creating new PDFs, filling PDF forms, encrypting/decrypting PDFs, extracting images, and OCR on scanned PDFs to make them searchable. If the user mentions a .pdf file or asks to produce one, use this skill.
Identify and prevent XSS, CSRF, SSRF, SQL Injection, Broken Access Control, and insecure direct object references.
