Linux如何查看和设置DNS服务器地址

迈不过友情╰ 2021-06-12 20:36 728阅读 0赞

# 查看DNS服务器地址 #

查看DNS配置文件，文件中的**nameserver**地址就是DNS服务器的地址。DNS配置文件的路径为：**/etc/resolv.conf**。

[root@i-dbb1f0ff network-scripts]# cat /etc/resolv.conf; 
    generated by /usr/sbin/dhclient-script
    nameserver 192.20.1.1
    nameserver 192.20.1.1

# 设置DNS服务器地址 #

1.使用`ifconfig`命令查看网卡信息，确认网卡名。

[root@i-dbb1f0ff network-scripts]# ifconfig
    eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet 10.105.184.195  netmask 255.255.255.0  broadcast 10.105.184.255
            inet6 fe80::d20d:dbff:feb1:f0ff  prefixlen 64  scopeid 0x20<link>
            ether d0:0d:db:b1:f0:ff  txqueuelen 1000  (Ethernet)
            RX packets 197079202  bytes 21761671766 (20.2 GiB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 13200691  bytes 7533972013 (7.0 GiB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
            inet 127.0.0.1  netmask 255.0.0.0
            inet6 ::1  prefixlen 128  scopeid 0x10<host>
            loop  txqueuelen 1  (Local Loopback)
            RX packets 3365044  bytes 1208000880 (1.1 GiB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 3365044  bytes 1208000880 (1.1 GiB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

2.将DNS服务器地址配置到网卡配置文件中。网卡配置文件路径：**/etc/sysconfig/network-scripts/ifcfg-eth0**。

[root@i-dbb1f0ff network-scripts]# vi ifcfg-eth0
    TYPE=Ethernet
    BOOTPROTO=dhcp
    DEVICE=eth0
    ONBOOT=yes
    DNS1="192.168.1.2"

3.设置完以后必须使用`service network restart`命令重启网卡服务才能生效，注意配置的DNS服务器地址必须要能连上才行。

# vi ifcfg-eth0
    [root@i-dbb1f0ff network-scripts]# service network restart
    正在关闭接口eth0：
    关闭环回接口：
    弹出界面eth0：