CentOS modify a fixed IP address
Reference Address: https://www.cnblogs.com/technology-huangyan/p/9146699.html
https://blog.csdn.net/rossisy/article/details/77855798
https://www.cnblogs.com/technology -huangyan / p / 9146699.html
First check the local IP address of the first
ip addr
If you are in VMWare EXSI web version, if not all content is displayed, you need to increase | more
ip addr | more
1. As the network ens192 is our current network, need to be modified to a fixed IP address, that ens192
vi /etc/sysconfig/network-scripts/ifcfg-ens192
The default content below
Which ONBOOT = "yes", indicating that it is to start the card
The need to increase the settings
IPADDR #IP address
PREFIX # prefix? ?
NETMASK # subnet mask
NETWORK #IP segment
GATEWAY # gateway address
# This program is based on DNS settings set in the main card,
# resolv.conf DNS automatically generated in accordance with the contents of the card set
# later want to change the DNS, you must modify the network card settings in DNS settings will not have problems after the failure of the server restarts
DNS1 # default DNS address, the card program to the DNS-based,
PEERDNS #
另外，特别注意，其中BOOTPROTO="static"选项即是固定IP地址
请仔细参考：https://blog.csdn.net/w670328683/article/details/61923858
2.编辑/etc/sysconfig/network
#网上推荐更改 NETWORKING=yes HOSTNAME=localhost.localdomain GATEWAY=192.168.191.2 #网关地址
vi /etc/sysconfig/network #尝试本机更改
172.17.130.131并未更改该项，暂时还未影响正常服务
3. 编辑/etc/resolv.conf，如果按上面的配置，这个应该会自动生成的
#网上的推荐更改为这两个 nameserver 8.8.8.8 nameserver 114.114.114.114
vi /etc/resolv.conf #尝试本机更改
4.重启网络服务
systemctl restart network.service #重启网络服务
systemctl status network.service #查看网络服务状态
出现问题
在重启了网络服务后，发现服务器IP地址是更改为配置了，但docker启动的容器却不可以正常访问（使用浏览器访问docker服务）
尝试解决
第一步：尝试重启docker服务
sudo systemctl daemon-reload sudo systemctl restart docker
最后发现，docker重启后，服务已经可以正常访问
第二步，安装一个工具net-tools
yum install net-tools
如果在更改了IP地址后，出现无法ping baidu.com，或者无法安装应用的情况，那么一般来说是DNS解析出了问题，回到修改/etc/resolv.conf，看看其中是不是有nameserver 8.8.8.8的配置在其中，如果有，应该就不是解析的问题了
通过命令查看服务器端口占用情况
netstat -lntp
可以查看到有哪些端口被占用了，这里可以看到，占用端口的应用都是docker-proxy
