Networking Overview
Debugging network issues from the command line.
Diagnostic Commands
ping google.com # Test connectivity
curl -I https://example.com # HTTP headers
ss -tlnp # Listening ports
netstat -rn # Routing table
dig example.com # DNS lookup
traceroute example.com # Route tracing
Checking Open Ports
ss -tlnp | grep 3000
lsof -i :3000