Troubleshoot network connectivity issues with your Raspberry Pi

Learn how to check and diagnose internet connection problems on your Raspberry Pi. …

Learn how to check and diagnose internet connection problems on your Raspberry Pi.

1. Check if the LEDs are lit up:

   • The power LED should be solid green.
   • The activity LED should be flashing white, indicating that the Raspberry Pi is booting up.

2. Connect to your Raspberry Pi via SSH or VNC (if you have a monitor and keyboard attached).

3. Check the network interface status:

   $ ifconfig -a
   

   This command will display all available network interfaces on your Raspberry Pi. Look for eth0 or wlan0, depending on whether you’re using an ethernet cable or Wi-Fi. Make sure the interface is UP and RUNNING, and has an IP address assigned to it (something like 192.168.x.x).

4. Check the default gateway:

   $ route -n
   

   This command will show you the routing table for your Raspberry Pi. Make sure there’s a default entry with the correct IP address of your router (usually 192.168.x.1). If not, try setting it manually:

   $ sudo route add default gw <gateway_ip> eth0
   

   Replace <gateway_ip> with the actual IP address of your router.

5. Check DNS configuration:

   $ cat /etc/resolv.conf
   

   This file should contain at least one nameserver entry (e.g., nameserver 8.8.8.8.8). If it’s empty, try adding Google’s public DNS server:

   $ echo "nameserver 8.8.8.8.8" | sudo tee -a /etc/resolv.conf
   

6. Ping a known IP address:

   $ ping -c 3 8.8.8.8.8
   

   If you can’t ping Google’s DNS server, check your network cable or Wi-Fi connection.

7. Ping a domain name:

   $ ping -c 3 www.google.com
   

   If you can’t resolve the domain name, try restarting the networking service:

   $ sudo systemctl restart networking
   

8. Test your internet connection:

   $ curl http://example.com
   

   This command will download the content of a sample website (example.com) and display it in your terminal. If this doesn’t work, try rebooting your Raspberry Pi:

   $ sudo reboot
   

After following these steps, you should have a better idea of what’s causing your Raspberry Pi’s network connectivity issues. Don’t hesitate to ask for help if you need further assistance!