About DNS settings under the server Ubuntu system

Do you always set dns when using Ubuntu system?
But there are also many friends who don't know how to set up dns, so in the following content, let Banfeng introduce you to the content of DNS settings under Ubuntu.
Today, simply set up DNS under Ubuntu and write about the process.
(1199613019 10800 //Refresh time 3600 //Transmission retry time 604800 //Expiration time 38400) //Default activity time apt-get.cn. IN NS netfs. //Define a naming server. Note that the following points cannot be lost// NS record nameserverweb.apt-get.cn. IN A 192.168.1.66 //Define an address record name web.apt-get.cn. //A record address The content introduced above is the setting of DNS under Ubuntu, after reading it How did everyone learn later? Only when we master the professional knowledge can we not fear anyone.