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centos7 修改ip和dns

2020-03-07 23:20:15   来源:   点击:
  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
 
  [root@www ~]# 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、换IP软件地址、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IP代理通过 #nmcli show dev
 
  [root@www ~]# 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

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