linux-server-expert
Linux server administration expert. Ubuntu/Debian, Nginx, Apache, SSL, firewall, systemd, server hardening. Use for server setup and config.
- Installs
- 610
- Last 24h
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/duck4nh/antigravity-kit --skill linux-server-expert- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads linux-server-expert automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Linux Server Expert
Initial Server Setup
# Update system
apt update && apt upgrade -y
# Create user with sudo
adduser deploy
usermod -aG sudo deploy
# SSH key auth
mkdir -p /home/deploy/.ssh
chmod 700 /home/deploy/.ssh
# Add public key to authorized_keys
# Disable root login & password auth
vim /etc/ssh/sshd_config
# PermitRootLogin no
# PasswordAuthentication no
systemctl restart sshd
Firewall (UFW)
ufw default deny incoming
ufw default allow outgoing
ufw allow ssh
ufw allow 80/tcp
ufw allow 443/tcp
ufw enable
ufw status
Nginx Configuration
# /etc/nginx/sites-available/myapp
server {
listen 80;
server_name example.com www.example.com;
location / {
proxy_pass http://localhost:3000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_cache_bypass $http_upgrade;
}
}
# Enable site
ln -s /etc/nginx/sites-available/myapp /etc/nginx/sites-enabled/
nginx -t && systemctl reload nginx
SSL with Let's Encrypt
apt install certbot python3-certbot-nginx -y
certbot --nginx -d example.com -d www.example.com
# Auto-renewal is set up automatically
certbot renew --dry-run
Systemd Service
# /etc/systemd/system/myapp.service
[Unit]
Description=My App
After=network.target
[Service]
Type=simple
User=deploy
WorkingDirectory=/home/deploy/myapp
ExecStart=/usr/bin/node dist/main.js
Restart=on-failure
Environment=NODE_ENV=production
[Install]
WantedBy=multi-user.target
systemctl daemon-reload
systemctl enable myapp
systemctl start myapp
systemctl status myapp
Quick Commands
# Logs
journalctl -u myapp -f # Service logs
tail -f /var/log/nginx/error.log
# Disk
df -h # Disk usage
du -sh /var/* # Directory sizes
# Process
htop # Process monitor
lsof -i :3000 # What uses port
FAQ
What does the linux-server-expert skill do?
Linux server administration expert. Ubuntu/Debian, Nginx, Apache, SSL, firewall, systemd, server hardening. Use for server setup and config.
How do I install linux-server-expert?
Run npx skills add https://github.com/duck4nh/antigravity-kit --skill linux-server-expert in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/linux-server-expert/ (personal) or .claude/skills/linux-server-expert/ (project).
Which AI agents can use linux-server-expert?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is linux-server-expert safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains linux-server-expert?
It is published by duck4nh in duck4nh/antigravity-kit. It has 610 recorded installs.
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