Linux Network Troubleshooting Guide

If the network connection fails on a Linux system, you can try the following methods to troubleshoot the issue:

1. Check network connection: First, make sure the network cable is connected properly, the router is functioning correctly, and there are no network disruptions. You can try connecting other devices to determine if the issue lies with the system.
2. Check network settings: Verify that the system’s network settings are correct, including IP address, subnet mask, gateway, and DNS server. You can use the commands ifconfig and ip addr to view network configuration information.
3. Check network services: Verify if network services are running properly by using the command systemctl status network.service to check the status of the network service.
4. Restarting the network service: Attempt to restart the network service to re-establish the network connection, you can use the command systemctl restart network.service to restart the network service.
5. Check the firewall settings: Make sure the firewall settings are not blocking the network connection. You can try temporarily turning off the firewall to test the network connection.
6. Check network equipment: Verify the status of network devices by using the commands ifconfig and ip addr.
7. Check network drivers: Verify if the drivers for the network devices are properly installed, you can try updating or reinstalling the network drivers.
8. Check the network configuration file: Verify if the network configuration file of the system is correct by using the command “cat /etc/network/interfaces” to view the network configuration file.

If the above methods do not solve the problem, you can try restarting the system or contacting the network administrator for further troubleshooting and resolution.