通過resolvconf實現配置
resolvconfig應用可以實現DNS信息管理，可以通過下面的應用來安裝此組件：
sudo apt-get install resolvconf
創建/etc/default/resolvconf缺省配置文件，添加相關環境變量
bob@ubuntu:/etc/resolvconf/resolv.conf.d$ cat /etc/default/resolvconf
TRUNCATE_NAMESERVER_LIST_AFTER_127=no
該環境變量影響保存到/etc/resolv.conf的DNS配置條數。向/etc/resolvconf/resolv.conf.d/base配置文件中添加DNS配置項。
bob@ubuntu:/etc/resolvconf/resolv.conf.d$ cat base
nameserver 10.220.0.11
nameserver 10.220.0.12
search infinera.com
使用下列配置命令使配置生效
sudo resolvconf -u