记一次centos改静态ip
1.修改/etc/sysconfig/network-scripts/网卡文件
eg：vi /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
#BOOTPROTO="dhcp"
#静态ip配置，根据自己的VMware网段进行设置
BOOTPROTO="static"
IPADDR="192.168.25.137" #这里设置IP地址
NETMASK="255.255.255.0" #设置子网掩码
GATEWAY="192.168.25.2" #设置网关
DNS1="8.8.8.8" #设置dns 域名解析服务器
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="ens33"
UUID="4f9a5611-f3c9-447c-9df8-02f6b5d6825b"
DEVICE="ens33"
#设置静态ip 需要将ONBOOT的值改为yes
#ONBOOT="no"
ONBOOT="yes"
2.重启网络，网卡
#重启网卡
ifconfig ens33 down
ifconfig ens33 up
#重启网络
service network restart
#或者可以service network stop 然后 service network start
#systemctl restart network.service
重启后一般可以看见静态ip
设置成功
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.25.137 netmask 255.255.255.0 broadcast 192.168.25.255
inet6 fe80::a91d:cbe4:2cbb:49cc prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:cc:43:c8 txqueuelen 1000 (Ethernet)
RX packets 1114 bytes 276650 (270.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 246 bytes 31097 (30.3 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 1000 (Local Loopback)
RX packets 64 bytes 5568 (5.4 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 64 bytes 5568 (5.4 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
然后可以ping 百度网址。
ping www.baidu.com
PING www.wshifen.com (103.235.46.39) 56(84) bytes of data.
64 bytes from 103.235.46.39 (103.235.46.39): icmp_seq=1 ttl=128 time=65.6 ms
64 bytes from 103.235.46.39 (103.235.46.39): icmp_seq=2 ttl=128 time=65.5 ms
64 bytes from 103.235.46.39 (103.235.46.39): icmp_seq=3 ttl=128 time=66.2 ms
64 bytes from 103.235.46.39 (103.235.46.39): icmp_seq=4 ttl=128 time=65.4 ms
64 bytes from 103.235.46.39 (103.235.46.39): icmp_seq=5 ttl=128 time=65.6 ms
^C
--- www.wshifen.com ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4007ms
rtt min/avg/max/mdev = 65.420/65.708/66.285/0.440 ms
如果能ping通说明网络通了。
如果不能ping通，进一步排查问题，先ping 网关地址 （上面配置文件的设置项）。
ping 192.168.25.2
PING 192.168.25.2 (192.168.25.2) 56(84) bytes of data.
64 bytes from 192.168.25.2: icmp_seq=1 ttl=128 time=0.140 ms
64 bytes from 192.168.25.2: icmp_seq=2 ttl=128 time=0.145 ms
64 bytes from 192.168.25.2: icmp_seq=3 ttl=128 time=0.275 ms
64 bytes from 192.168.25.2: icmp_seq=4 ttl=128 time=0.900 ms
64 bytes from 192.168.25.2: icmp_seq=5 ttl=128 time=0.255 ms
^C
--- 192.168.25.2 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4002ms
rtt min/avg/max/mdev = 0.140/0.343/0.900/0.283 ms
能通就可以确定网关设置正确，反之 网关设置错误，重新设置网关。
假如网关能ping通，就开始进行下一步
systemctl stop NetwrokManager
systemctl disable NetworkManager
#然后重启网络
service network restart
在ping查看网络是否通路，如果不是则查看/etc/resolv.conf 文件中是否有nameserver
# Generated by NetworkManager
search localdomain
nameserver 8.8.8.8
~
~
~
1,1 全部
没有则可以手动加上，重启机器。
假如最后还是不能网络通路，最后建议进行图形界面设置静态ip。server 版本好像有个像boot一样的界面也可以设置ip，这里我没找到。