centos7 修改ip和dns

Posted 2021-02-11 三天泪

RHEL7、CentOS7命令添加和修改网卡IP地址和NDS

 

RHEL7、CentOS7默认安装之后是没有启动网络连接！（我们就不按6的方试设置IP了，用命令方试添加IP、网关和DNS）

一、设置IP地址、网关和DNS

#nmcli connection add type ethernet autoconnect yes con-name eht0 ifname eth0 ip4 192.168.99.2 gw4 192.168.99.1  #添加IP地址和网站
#nmcli connection modify eth0 ipv4.dns 8.8.8.8       #添加DNS
#systemctl restart network        #重新启动网络

#ip a      #查看IP

[[email protected] ~]＃ ip a
 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
 inet 127.0.0.1/8 scope host lo
 valid_lft forever preferred_lft forever
 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
 link/ether 18:66:da:eb:15:cc brd ff:ff:ff:ff:ff:ff
 inet 192.168.99.2/24 brd 192.168.99.255 scope global eth0
 valid_lft forever preferred_lft forever

#ping -c4 www.baidu.com

二、修改IP地址、网关和DNS

# nmcli connection modify eth0  ipv4.addresses 192.168.0.11/24
# nmcli connection modify eth0 ipv4.method manual
#nmcli connection modify eth0 ipv4.dns 9.9.9.9
#systemctl restart network

#ip a                也可通过 #nmcli show dev

[[email protected] ~]＃ ip a
 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
 inet 127.0.0.1/8 scope host lo
 valid_lft forever preferred_lft forever
 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
 link/ether 18:66:da:eb:15:cc brd ff:ff:ff:ff:ff:ff
 inet 192.168.0.11/24 brd 192.168.0.255 scope global eth0
 valid_lft forever preferred_lft forever

#man nmcli   可以通过查看网卡帮助文件有更详细的说明

至此：RHEL7、CentOS7添加网卡和修改网卡IP、DNS 已完成