CentOS 7 修改DNS

1、nmcli connection show 命令找到设备名称

# nmcli connection show
NAME    UUID                                  TYPE      DEVICE 
enp4s0  99559edf-4e0a-4bae-a528-6d75065261e9  ethernet  enp4s0 

2、nmcli connection modify 命令修改dns

nmcli connection modify enp4s0 ipv4.dns "114.114.114.114 8.8.8.8"

这时候查看/etc/sysconfig/network-scripts/ifcfg-enp4s0已修改了，但是/etc/resolv.conf还没修改

[root@localhost yum.repos.d]# cat /etc/sysconfig/network-scripts/ifcfg-enp4s0
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
IPV6_AUTOCONF=no
IPV6_DEFROUTE=no
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=enp4s0
UUID=99559edf-4e0a-4bae-a528-6d75065261e9
DEVICE=enp4s0
ONBOOT=yes
IPADDR=10.100.1.99
PREFIX=24
GATEWAY=10.100.1.1
DNS1=114.114.114.114
DNS2=8.8.8.8

3、使用nmcli connection up命令生效

nmcli connection up enp4s0

成功执行后，/etc/resolv.conf也修改了