How do you troubleshoot network connectivity issues in Linux?
There are multiple ways to troubleshoot the network connectivity and find the issue correctly:
Check the Internet Connectivity :
* First of all, please check if the internet connection option is on and also check the cables to find if there is any issue with it.
Verify the Network Configuration :
* Please check that your network is configured correctly and the network interface has your IP address. You can check it by running the ip addr or ifconfig commands.
* You can also run the ip route command to check if the default gateway is set properly.
* Finally, verify the DNS server configuration in the /etc/resolv.conf file.
Check the Firewall :
* Sometimes, firewall rules block the internet connection for the system’s security. Hence, you can run the ufw or iptables command to modify the firewall rules.
Network Interface :
* You can restart your network interface through the ifup and ifdown commands. Once you restart the network interface, please reboot the system to make changes successful.
