Linux将动态IP改为静态IP

1、编辑 ifcfg-eth0 文件，vim 最小化安装时没有被安装，需要自行安装不描述。

[root@root123 ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0

2、修改如下内容

BOOTPROTO="static" #dhcp改为static 
ONBOOT="yes" #开机启用本配置
IPADDR=192.168.197.131#静态IP
GATEWAY=192.168.197.2#默认网关
NETMASK=255.255.255.0#子网掩码
DNS1=192.168.197.2#DNS 配置

3、修改后效果

[root@root123 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
HWADDR="00:15:5D:07:F1:02"
TYPE="Ethernet"
BOOTPROTO="static" #dhcp改为static 
DEFROUTE="yes"
PEERDNS="yes"
PEERROUTES="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_PEERDNS="yes"
IPV6_PEERROUTES="yes"
IPV6_FAILURE_FATAL="no"
NAME="eth0"
UUID="bb3a302d-dc46-461a-881e-d46cafd0eb71"
ONBOOT="yes" #开机启用本配置
IPADDR=192.168.197.131#静态IP
GATEWAY=192.168.197.2#默认网关
NETMASK=255.255.255.0#子网掩码
DNS1=192.168.197.2#DNS 配置

4、重启下网络服务

[root@root123 ~]# service network restart

　　

5、查看改动后的效果，Centois 7 不再使用 ifconfig 而是用 ip 命令查看网络信息。

[root@root123 ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
    link/ether 00:0c:29:b3:a8:5e brd ff:ff:ff:ff:ff:ff
    inet 192.168.197.131/24 brd 192.168.197.255 scope global eth0
    inet 192.168.197.129/24 brd 192.168.197.255 scope global secondary eth0
    inet6 fe80::20c:29ff:feb3:a85e/64 scope link 
       valid_lft forever preferred_lft forever