Linux CentOS6和CentOS7设置静态ip

一、CentOS6

1.1 请确认网络连接方式为：桥接

2.修改网卡eth0

执行命令：vim /etc/sysconfig/network-scripts/ifcfg-eth0

++++++++++++++++++++++++++++++++

DEVICE=“eth0”
BOOTPROTO=“static” #将原来的值“dhcp”改为“static”
HWADDR=“00:0C:29:F2:4E:96”
IPV6INIT=“yes”
NM_CONTROLLED=“yes”
ONBOOT=“yes”
TYPE=“Ethernet”
UUID=“b68b1ef8-13a0-4d11-a738-1ae704e6a0a4”

IPADDR=192.168.1.16 #你需要定义的IP地址，不要与本机ip地址一样
NETMASK=255.255.255.0 #子网掩码，
GATEWAY=192.168.1.1 #默认网关，一般与路由器地址一样

++++++++++++++++++++++++++++++++

保存退出

3.重启网络服务

service network restart

4.检查一下状态

ifconfig

+++++++++++++++++++++++++++++++++

eth0 Link encap:Ethernet HWaddr 00:0C:29:F2:4E:96
inet addr:192.168.1.16 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fef2:4e96/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:17017 errors:0 dropped:0 overruns:0 frame:0
TX packets:9586 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:7803412 (7.4 MiB) TX bytes:1613751 (1.5 MiB)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:21844 errors:0 dropped:0 overruns:0 frame:0
TX packets:21844 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2042507 (1.9 MiB) TX bytes:2042507 (1.9 MiB)

+++++++++++++++++++++++++++++++++

到了这里，请ping一下外网

ping baidu.com

5.我遇到两个情况：

5.1 ping通了，那就OK！

5.2 报错：ping:unknow host baidu.com

我的解决方法是：

dhclient

敲了这个命令后，再ping一次

---------------------------------

PING baidu.com (180.149.132.47) 56(84) bytes of data.
　　64 bytes from 180.149.132.47: icmp_seq=1 ttl=54 time=38.3 ms
　　64 bytes from 180.149.132.47: icmp_seq=2 ttl=54 time=38.7 ms
　　64 bytes from 180.149.132.47: icmp_seq=3 ttl=54 time=49.7 ms
　　64 bytes from 180.149.132.47: icmp_seq=4 ttl=54 time=38.1 ms
　　64 bytes from 180.149.132.47: icmp_seq=5 ttl=54 time=37.9 ms
　　64 bytes from 180.149.132.47: icmp_seq=6 ttl=54 time=38.3 ms

---------------------------------
　　借鉴：https://www.cnblogs.com/yepo/p/5691460.html
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二、CentOS7

设置静态IP地址与动态iIP差不多，也是要修改网卡配置文件 vi /etc/sysconfig/network-scripts/ifcfg-ens32 (最后一个为网卡名称)

（1）bootproto=static

（2）onboot=yes

（3）在最后加上几行，IP地址、子网掩码、网关、dns服务器

IPADDR=192.168.1.160
NETMASK=255.255.255.0
GATEWAY=192.168.1.1
DNS1=119.29.29.29
DNS2=8.8.8.8

（4）重启网络服务

[root@mini ~]# systemctl restart network

DNS服务器可以只配一个，我用的是两个免费的dns服务器，查看IP地址，测试联网

[root@mini ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope hostvalid_lft forever preferred_lft forever
2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000link/ether 00:0c:29:d2:42:55 brd ff:ff:ff:ff:ff:ffinet 192.168.1.160/24 brd 192.168.1.255 scope global noprefixroute ens32valid_lft forever preferred_lft foreverinet6 fe80::f86e:939e:ff9b:9aec/64 scope link noprefixroutevalid_lft forever preferred_lft forever[root@mini ~]# ping www.baidu.com
PING www.a.shifen.com (163.177.151.109) 56(84) bytes of data.
bytes from 163.177.151.109 (163.177.151.109): icmp_seq=1 ttl=55 time=27.5 ms
bytes from 163.177.151.109 (163.177.151.109): icmp_seq=2 ttl=55 time=35.2 ms
^C
--- www.a.shifen.com ping statistics ---
packets transmitted, 2 received, 0% packet loss, time 1008ms
rtt min/avg/max/mdev = 27.570/31.425/35.281/3.859 ms