secure-linux-web-hosting

Overview of secure-linux-web-hosting skill

What the secure-linux-web-hosting skill does

The secure-linux-web-hosting skill helps an agent turn a generic Linux cloud server into a safer public web host without relying on outdated distro assumptions. It is designed for practical deployment work: SSH access, firewalling, Nginx setup, static-site hosting or reverse proxying, HTTPS issuance, redirect timing, and final validation.

Who should use it

This skill is best for people who are:

• setting up a VPS, droplet, VM, or cloud instance for web hosting
• migrating from generic blog tutorials to a safer, more current workflow
• self-hosting a static site or an app behind Nginx
• reviewing whether an existing server setup is exposed more broadly than needed

It is especially useful when the distro is not yet known, because the workflow explicitly routes by distro family before giving commands.

Real job-to-be-done

The real value of secure-linux-web-hosting is not “install Nginx.” It is helping an agent choose the safe order of operations so users do not lock themselves out of SSH, expose app ports directly, request TLS too early, or copy Debian-flavored commands onto the wrong Linux family.

What makes this skill different

The strongest differentiators are:

• distro-aware routing before actionable commands
• clear separation between static hosting and reverse-proxy hosting
• strong sequencing around SSH hardening, firewall changes, and TLS
• emphasis on validation gates between phases, not just configuration snippets

The repository’s reference files add more decision support than a single linear guide:

• references/workflow-map.md
• references/distro-routing.md
• references/nginx-patterns.md
• references/security-and-tls.md

How to Use secure-linux-web-hosting skill

Install context for secure-linux-web-hosting

If your skills runner supports GitHub-installed skills, add secure-linux-web-hosting from the upstream repository, for example with:

npx skills add https://github.com/xixu-me/skills --skill secure-linux-web-hosting

Then invoke it when the task involves Linux web hosting, reverse proxy setup, SSH hardening, DNS-to-server cutover, or HTTPS enablement.

Read these files first

To use the secure-linux-web-hosting skill efficiently, do not start with random snippets. Read in this order:

1. SKILL.md
2. references/workflow-map.md
3. references/distro-routing.md
4. references/nginx-patterns.md
5. references/security-and-tls.md

This reading path mirrors how the skill actually thinks: route first, choose hosting pattern second, then tighten security and TLS in a safe sequence.

What input the skill needs before it can help well

Give the skill concrete deployment facts, not just “secure my server.” The most important inputs are:

• Linux distro or /etc/os-release
• hosting goal: static files or reverse proxy to an app
• domain names involved
• cloud provider or hosting environment
• current SSH method: root, non-root, key-based, password-based
• current firewall layer: provider firewall, ufw, firewalld, nftables, none
• whether SELinux or AppArmor is active
• app port and bind address if reverse proxying
• whether the site is already reachable on port 80

Without these, the agent has to guess at package names, service units, config paths, and policy constraints.

Turn a rough request into a strong prompt

Weak prompt:

• “Set up secure hosting on my server.”

Better prompt:

• “Use secure-linux-web-hosting for Deployment on an Ubuntu 24.04 VPS. I have SSH key access, a sudo user, domain example.com, and want Nginx to reverse proxy a Node app on 127.0.0.1:3000. I want key-based SSH only, a deny-by-default firewall, Let’s Encrypt HTTPS, and a safe validation sequence that avoids locking me out.”

That version gives the skill enough context to choose the right branch and safety checks.

Use the workflow map, not a copy-paste tutorial

A good secure-linux-web-hosting usage pattern is:

1. classify the host and current state
2. confirm recovery path and SSH safety
3. decide static-site vs reverse-proxy branch
4. configure firewall exposure only for the current phase
5. get plain HTTP working first
6. issue TLS
7. enable permanent redirect after HTTPS verification
8. do optional tuning later

This is the core reason to use the skill instead of a generic “secure my VPS” prompt.

Choose the right hosting branch early

The skill intentionally keeps these outcomes separate:

• Static site: Nginx serves files directly from a document root
• Reverse proxy: Nginx is public, but the app stays on 127.0.0.1:<port>

If you do not state which branch you need, you may get muddled advice that mixes filesystem serving with upstream proxy settings. references/nginx-patterns.md is the key file here.

Safety checks that materially affect success

Before making hardening changes, ask the skill to include:

• a second active SSH session or console fallback
• SSH config validation before reload
• confirmation that key login works before disabling passwords
• confirmation that the app is not publicly bound when reverse proxying
• nginx -t before reload
• DNS and HTTP reachability before certificate issuance

These checks are where the secure-linux-web-hosting guide becomes genuinely safer than ordinary prompting.

Practical repository-backed constraints

This skill does not try to be a full distro-specific command encyclopedia. It repeatedly expects the agent to verify:

• package names
• service unit names like ssh vs sshd
• firewall tooling already present
• SELinux/AppArmor implications
• current ACME client guidance

That means it is strong for workflow and safe sequencing, but you should expect live verification against official docs for exact commands.

Example prompt for static hosting

“Use secure-linux-web-hosting to set up a static site on a Debian-based VPS. My domain is docs.example.com. I already have SSH key access and can use sudo. I want Nginx serving files from /srv/www/docs, only ports 80 and 443 exposed, Let’s Encrypt HTTPS, and a checklist to verify DNS, Nginx config, file permissions, and redirect timing.”

Example prompt for app deployment

“Use the secure-linux-web-hosting skill for Deployment on Rocky Linux. I need Nginx in front of an app listening on 127.0.0.1:8080. Please route for distro-specific package and service differences, account for firewalld and SELinux, keep the backend private, get HTTP working first, then add HTTPS and only then enforce HTTP-to-HTTPS redirect.”

secure-linux-web-hosting skill FAQ

Is secure-linux-web-hosting good for beginners?

Yes, if the beginner wants a guided operator workflow rather than one-command automation. The skill is friendly in structure, but it assumes the user can answer basic environment questions and follow validation steps carefully.

When is this skill a strong fit?

Use secure-linux-web-hosting when you need to:

• stand up a public Linux web host safely
• harden SSH without cutting off access
• host a static site
• put Nginx in front of a local app
• sequence TLS and redirects safely
• review an existing server for overexposure

When is it the wrong tool?

It is a weaker fit if you want:

• one-click provisioning
• a Docker/Kubernetes-first deployment guide
• deep app-specific production tuning
• a pure mail server, database cluster, or non-web infrastructure guide

It is also not ideal if your main need is advanced Nginx performance tuning rather than secure initial hosting setup.

Why use this instead of a normal prompt?

A normal prompt often jumps straight to commands. The secure-linux-web-hosting skill adds structure that reduces common mistakes:

• assuming the wrong distro family
• exposing backend app ports
• hardening SSH from the only live session
• enabling redirects before HTTPS works
• treating static hosting and reverse proxying as the same pattern

Does it support different Linux families?

Yes, conceptually. The repository includes distro-routing guidance and explicitly warns against assuming Debian defaults on unknown hosts. The tradeoff is that exact commands should still be verified live for the user’s distro and tooling.

Can I use secure-linux-web-hosting for existing servers?

Yes. It works for review and remediation as well as fresh install work. In fact, it is useful when inheriting a server because the intake phase helps classify what is already exposed, what firewall layers exist, and whether the web stack is static or proxied.

How to Improve secure-linux-web-hosting skill

Give environment facts up front

The fastest way to improve secure-linux-web-hosting output quality is to provide the environment details the references ask for. At minimum include:

• distro
• hosting goal
• domain
• SSH status
• firewall tooling
• backend port/bind if any
• SELinux/AppArmor status

This prevents the agent from generating generic or mismatched commands.

Ask for phase-by-phase output

Instead of asking for a giant all-at-once answer, request:

• current-state assessment
• recommended path
• commands for one phase
• verification checks
• rollback or safety notes

That matches the repository’s workflow design and reduces risky leaps.

Force the skill to show branch decisions

One common failure mode is vague output that never clearly chooses static hosting versus reverse proxy. Improve results by asking:

• “State which hosting branch you are using and why.”
• “List what remains private and what becomes public.”
• “Show the validation gate before moving to TLS.”

Request verification after every risky change

The highest-value improvement is to ask the skill to pair each change with a check, for example:

• after SSH edits: config test and second-session login test
• after firewall changes: confirm expected ports only
• after Nginx config: nginx -t and service health
• before certificates: curl or browser reachability on HTTP
• after TLS: certificate and redirect validation

Watch for common secure-linux-web-hosting failure modes

Typical issues include:

• wrong package or service names for the distro
• backend app listening on 0.0.0.0 instead of loopback
• DNS not pointing where expected
• file permissions or SELinux blocking static serving
• provider firewall and host firewall not aligned
• redirect enabled before HTTPS is actually healthy

If any of these are likely, ask the skill to add explicit diagnostics rather than only setup steps.

Iterate with real errors, not abstract retries

If the first run fails, feed back the actual evidence:

• nginx -t output
• systemctl status
• ss -tulpn
• relevant firewall state
• certificate client error messages
• curl -I results
• distro/version details

secure-linux-web-hosting install and usage quality improve sharply when the agent can debug from observed state instead of rewriting the same generic plan.

Improve output quality by anchoring to the repo references

A strong refinement prompt is:

• “Use references/workflow-map.md for sequencing, references/distro-routing.md for command routing, references/nginx-patterns.md for branch selection, and references/security-and-tls.md for safe hardening and certificate order.”

That makes the skill behave more like a structured deployment guide and less like a broad Linux explainer.