How to permanently modify DNS in debian

Here is a method to permanently modify DNS for Debian, which is different from temporary modification.

nano /etc/dhcp/dhclient.conf

Add at the end

supersede domain-name-servers 8.8.8.8, 8.8.4.4;

ctrl+x, then press y and then press enter to save and exit!

Restart the network card:

systemctl restart networking.service

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