网卡配置文件:
/etc/sysconfig/network-scripts/ifcfg-eth0
[root@nsd ~]#nmtui #快速图形化配置IP地址
(1)显示当前网络接口(网卡)信息
[root@nsd ~]#nmcli connection show
名称 UUID 类型 设备
p8p1 f1ca7a2b-594a-4ec0-8541-07e316f321b1 802-3-ethernet p8p1
(2)利用命令配置
[root@nsd ~]#nmcli connection modify 'System eth0'
ipv4.method manual ipv4.addresses '172.25.0.200/24 172.25.0.254'
ipv4.dns 172.25.254.254 connection.autoconnect yes #开机自动启用
(3)查看网卡配置文件内容
[root@nsd ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
(4)激活网卡配置
[root@nsd ~]# nmcli connection up 'System eth0'
(5)永久修改DNS服务器地址 /etc/resolv.conf
[root@nsd ~]#echo nameserver 172.25.254.254 > /etc/resolv.conf
[root@nsd ~]#cat /etc/resolv.conf
[root@nsd ~]#nslookup server0.example.com #测试解析
(6)查看网关地址
[root@nsd ~]# route -n
RHEL7.2及以上系统,通过ipv4.gateway改网关
ipv4.dns-search 默认搜索域
nmcli device status #查看当前网卡连接状态