SSH MCP Server

# Nginx Typo Debugging Flow with SSH Tools ```mermaid sequenceDiagram participant U as User participant G as Grok (LLM) participant S as SSH MCP Server participant R as Remote Server U->>G: "Help me debug my Nginx config typo" G->>S: Call ssh_exec: "cat /etc/nginx/nginx.conf" <br>(host: remote.example.com, username: user, privateKeyPath: ~/.ssh/id_rsa) S->>R: SSH: cat /etc/nginx/nginx.conf R-->>S: Config file contents with typo: "srever" instead of "server" S-->>G: Returns config file contents G->>U: Shows config: "I found a typo: 'srever' should be 'server' in line 10" U->>G: "Can you fix it with 'sed'?" G->>S: Call ssh_exec: "sed -i 's/srever/server/' /etc/nginx/nginx.conf" <br>(same credentials) S->>R: SSH: Executes sed command to fix typo R-->>S: Command executed successfully S-->>G: Success response G->>S: Call ssh_exec: "cat /etc/nginx/nginx.conf" <br>(to verify fix) S->>R: SSH: cat /etc/nginx/nginx.conf R-->>S: Updated config with "server" S-->>G: Returns updated config G->>S: Call ssh_exec: "nginx -t && cat /var/log/nginx/error.log | tail -n 10" S->>R: SSH: Tests config and reads last 10 log lines R-->>S: "nginx: configuration file /etc/nginx/nginx.conf test is successful" <br> + log output S-->>G: Returns test result and logs G->>U: "Fix applied successfully. Config test passed. Recent logs show no errors." ``` ## Typo Debugging Scenario 1. **SSH Tool Usage** (Green): - Execute diagnostic commands - Edit configuration files - Service management - Secure credential storage 2. **Debugging Flow**: 1. User reports unexpected 500 errors 2. Model checks error logs via SSH: `grep error /var/log/nginx/error.log` 3. Identifies "unknowndirective" typo in config 4. Models directs config edit: `sed -i 's/unknowndirective/known_directive/g' /etc/nginx/nginx.conf` 5. Validate configuration with `nginx -t` 6. Graceful restart: `systemctl reload nginx` 7. Confirm site functionality restored