how to configure dns name server in ubuntu linux 18.04?
['Install the resolvconf package. sudo apt install resolvconf.', 'Edit /etc/resolvconf/resolv.conf.d/head and add the following: # Make edits to /etc/resolvconf/resolv.conf.d/head. nameserver 8.8.4.4 nameserver 8.8.8.8.', 'Restart the resolvconf service. sudo service resolvconf restart.']