CentOS7 设置静态 IP

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测试环境：

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[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.0.1406 (Core)

查找网卡信息

找到要修改的网卡，比如我这里的是 eno16777736

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[root@localhost ~]# ifconfig
eno16777736: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.204.128  netmask 255.255.255.0  broadcast 192.168.204.255
        inet6 fe80::20c:29ff:fe43:2fd1  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:43:2f:d1  txqueuelen 1000  (Ethernet)
        RX packets 93  bytes 10339 (10.0 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 102  bytes 12391 (12.1 KiB)
        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 0  (Local Loopback)
        RX packets 15  bytes 1329 (1.2 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 15  bytes 1329 (1.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

修改配置

找到 eno16777736 这个网卡对应的配置文件，编辑

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[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-eno16777736

文件默认配置是这样的（后面的注释是我加上去的）：

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HWADDR=00:0C:29:43:2F:D1
TYPE=Ethernet
BOOTPROTO=dhcp ## IP的分配模式，这里是DHCP
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=eno16777736
UUID=0c9115ee-a2b3-47bc-b2b9-efecb596e108
ONBOOT=yes ## 是否默认开机启动

现在要做的就是更改为如下配置，后面的几个项根据自己实际情况配置

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HWADDR=00:0C:29:43:2F:D1
TYPE=Ethernet
## BOOTPROTO=dhcp ## 把DHCP注释掉
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=eno16777736
UUID=0c9115ee-a2b3-47bc-b2b9-efecb596e108
ONBOOT=yes ## 是否开机启动
 
## Broly: static
BOOTPROTO=static ## DHCP改为static    
IPADDR=192.168.204.136 ## 静态IP地址  
GATEWAY=192.168.204.1 ## 网关  
NETMASK=255.255.255.0 ## 子网掩码  
##DNS1=192.168.204.1 ## DNS配置，看着配

重启网络服务

别忘了重启网络服务

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[root@localhost ~]# systemctl restart network.service