🗓️ 04102025 0025
Quick reference hub for networking command-line tools.
Tool Categories
| Purpose | Tools | Detail Notes |
|---|---|---|
| DNS lookup | dig, nslookup, host | networking_dns_tools |
| Test connectivity | ping, traceroute | networking_connectivity |
| HTTP/APIs | curl, wget | networking_http_tools |
| Ports/connections | netstat, ss, lsof | networking_ports_connections |
| Network config | ip, ifconfig | networking_interfaces |
| Advanced debugging | tcpdump, nmap | networking_advanced_debugging |
| DNS overrides | /etc/hosts | networking_etc_hosts |
Quick Command Reference
# Connectivity
ping example.com # Test if host is reachable
traceroute example.com # See network path
# DNS
dig example.com # DNS lookup
dig @8.8.8.8 example.com # Query specific DNS server
# HTTP
curl https://example.com # Test HTTP
curl -I https://example.com # Headers only
# Ports
netstat -tuln # Listening ports
lsof -i :8080 # What's using port 8080?
# Network Info
ip addr show # Show IPs (Linux)
ifconfig # Show IPs (Mac)
Troubleshooting Flow
Website not loading?
↓
1. ping google.com → Network working?
↓
2. dig example.com → DNS resolving?
↓
3. ping example.com → Host reachable?
↓
4. curl -I example.com → Web server responding?
References
- networking_dns_tools - DNS tools (dig, nslookup, host, whois)
- networking_connectivity - Connectivity tools (ping, traceroute)
- networking_http_tools - HTTP tools (curl, wget)
- networking_ports_connections - Port tools (netstat, ss, lsof)
- networking_interfaces - Interface tools (ip, ifconfig)
- networking_advanced_debugging - Advanced tools (tcpdump, nmap)
- networking_etc_hosts - Local DNS overrides