Adding Additional Nameservers to resolv.conf on Linux
Resolv.conf
If you need to add additional nameservers to your resolv.conf because of DNS related issues, you'll want to use a package that manages the file at /etc/resolv.conf. This is because on system restart, the file will be overwritten by other processes and you will lose any previous changes.
Install and Enable Resolvconf Package
sudo apt update
sudo apt install resolvconf
Check if it is running
sudo systemctl status resolvconf
Enable the service.
sudo systemctl enable resolvconf.service
Add Additonal Nameservers
Open /etc/resolvconf/resolv.conf.d/head and add the nameservers you want.
nameserver 8.8.8.8
nameserver 8.8.4.4
Save the changes and then restart the service.
sudo systemctl restart resolvconf
Check the /etc/resolv.conf to verify your nameservers have been added now.
If so, you are all set!
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