🗓️ 04102025 0025
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Networking Tools Overview

Quick reference hub for networking command-line tools.

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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

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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)

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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?

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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