How do you troubleshoot network connectivity issues on a Raspberry Pi?
Troubleshooting network connectivity issues on a Raspberry Pi involves systematic checks across hardware, software, and network configurations. Here’s a step-by-step guide: 1. Verify Physical Connections Ethernet : Ensure the cable is securely plugged into both the Pi and router/switch. Try a different cable or port on the router. Wi-Fi : Confirm the Pi’s Wi-Fi antenna (if external) is connected. Check signal strength with: bash iwconfig wlan0 | grep "Signal" 2. Check Network Interface Status List all interfaces: bash ip a Look for eth0 (Ethernet) or wlan0 (Wi-Fi). If missing, the driver may not be loaded. Bring an interface up/down: bash sudo ip link set eth0 up # Enable sudo ip link set eth0 down # Disable 3. Test DHCP Configuration Renew DHCP lease : bash sudo dhclient -v eth0 # Ethernet sudo dhclient -v wlan0 # Wi-Fi Check assigned IP: bash hostname -I # Quick IP check ifconfig eth0 | grep "inet " # Detailed If no IP is a...