I've just upgraded ubuntu 19.04 to 19.10. The worst problem that I have is this :

root@ziomario-Z390-AORUS-PRO:/home/ziomario# ping www.google.it

ping: www.google.it: Errore temporaneo nella risoluzione del nome

I'm not able to connect to internet anymore. To fix that,I should give the dhclient command and after that I should wait 15 minutes before that I can connect. For this problem I have started another thread here :

After upgrading ubuntu 19.04 to 19.10,I should wait 15 minutes to be connected,after giving the dhclient command

I've reinstalled ubuntu 19.10 on another disk and there the connection works great. So,I've thought,if there is a way to backup all the net configuration files from the working ubuntu installation and restore them on the ubuntu that has a broken net configuration.

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