How to reset network settings on Ubuntu?

To reset the network configuration of Ubuntu, you can follow these steps:

1. To open the terminal, you can open it by pressing Ctrl+Alt+T.
2. Use the following command to edit the network configuration file:
3. Open the file interfaces located in the directory /etc/network/ using the text editor nano with superuser privileges.
4. In the opened file, clear all the content and input the following text:
5. Automatically configure the loopback interface.
6. Press Ctrl+O to save the file, then press Ctrl+X to close the file.
7. Use the following command to edit the network manager configuration file:
8. Open the NetworkManager.conf file using the nano text editor with administrative privileges.
9. Open the file and locate the [main] section, then add the following content below it:
10. the default setting for dns
11. Press Ctrl+O to save the file, and then press Ctrl+X to close it.
12. To restart the Network Manager service, please enter the following command:
13. Can you please restart the network manager service using sudo?
14. Finally, restart the computer to apply the changes.
15. Please restart the system using administrator privileges.

After completing the above steps, the network configuration of Ubuntu will be reset to its initial state. Please be advised that this will restore the default network settings and remove any customized configurations.