Permanent DNS

1. Install the resolvconf package.

   sudo apt install resolvconf
   

2. Edit /etc/resolvconf/resolv.conf.d/head or /etc/resolvconf/resolv.conf.d/tail and add the following:

   more see man resolvconf

   nameserver 8.8.4.4
   nameserver 8.8.8.8
   

3. Restart the resolvconf service.

   sudo service resolvconf restart