ubuntu18.04下dns如何设置?

1. 检查/etc/resolv.conf是否为软链接

$ ls -lh /etc/resolv.conf

2. 如果不是软链接，直接将域名服务器的地址写入/etc/resolv.conf中

$ sudo vi /etc/resolv.conf
nameserver 114.114.114.114

3. 如果是软链接，那么修改指向的软链接文件

$ sudo vi /run/resolvconf/resolv.conf
nameserver 114.114.114.114

4. 写入/run/resolvconf/resolv.conf后，如果关机，那么内容将会消失，因此推荐将内容写入/etc/resolvconf/resolv.conf.d/base中，以便永久生效

$ sudo vi /etc/resolvconf/resolv.conf.d/base
nameserver 114.114.114.114