linux使用nmcli管理网络,配置了DNS,重启后nameserver 又恢复到默认dns了
vim /etc/resolv.conf

# Generated by NetworkManager
nameserver 192.168.43.1

1.修改网卡配置文件
vim /etc/sysconfig/network-scripts/ifcfg-enp0s3
将PEERDNS改为no

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
**PEERDNS=no**
NAME=enp0s3
UUID=2ef994b5-508e-4818-8271-5aece710f396
DEVICE=enp0s3
ONBOOT=yes
IPADDR=192.168.43.151
PREFIX=24
GATEWAY=192.168.43.1

再编辑vim /etc/resolv.conf，设置自己想要的DNS

# Generated by NetworkManager
nameserver 192.168.43.1

这新重启之后，就不会变为默认dns了

2，还有一种方法
在网卡配置文件中指定dns
vim /etc/sysconfig/network-scripts/ifcfg-enp0s3

......
NAME=enp0s3
UUID=2ef994b5-508e-4818-8271-5aece710f396
DEVICE=enp0s3
ONBOOT=yes
IPADDR=192.168.43.151
PREFIX=24
GATEWAY=192.168.43.1
DNS1=192.168.43.1