rm -f /etc/resolv.conf
cat /etc/resolv.conf
#nameserver 1.1.1.1
#nameserver 1.0.0.1
nameserver 2606:4700:4700::1111
nameserver 2606:4700:4700::1001
EOF
# 禁止修改 /etc/resolv.conf
echo 'make_resolv_conf() { :; }' > /etc/dhcp/dhclient-enter-hooks.d/leave_my_resolv_conf_alone
chmod 755 /etc/dhcp/dhclient-enter-hooks.d/leave_my_resolv_conf_alone
chattr +i /etc/resolv.conf
参考
https://wiki.debian.org/resolv.conf
