修改resolv.conf

vim /etc/resolv.conf

锁定resolv.conf

chattr +i /etc/resolv.conf

提示错误：chattr: Operation not supported while reading flags on /etc/resolv.conf，需要卸除resolvconf模块

apt-get remove resolvconf

解除锁定

chattr -i /etc/resolv.conf

重启网卡

systemctl restart networking