春节期间因为疫情假期延长，导致连续鸽了两个星期，同时最近有点忙，会尽快补上的。
这一篇记录一下CentOS系统网络设置相关的命令。
查询当前IP地址
ifconfig
eth+序号代表不同的网络设置，对应的inet值即为各自IP地址。
如果显示ifconfig未安装（CentOS minimize最小化安装时一般不带），可以使用以下命令。
ip addr
如果没有inet对应的值，可以修改网络配置文件
vi /etc/sysconfig/network-scripts/ifcfg-eth0 ONBOOT=yes #开机自启动，然后保存此文件 systemctl restart network # 重启网络服务
也可以使用service network restart命令重启网络服务。
修改IP地址
vi /etc/sysconfig/network-scripts/ifcfg-eth0 BOOTPROTO=static #静态IP，默认为dhcp动态IP ONBOOT=yes #开机自启 IPADDR=192.168.0.230 #静态IP GATEWAY=192.168.0.1 #默认网关 NETMASK=255.255.255.0 #子网掩码 DNS1=192.168.0.1 #DNS 配置 DNS2=8.8.8.8 systemctl restart network#重启网络服务
另外可以试试nm-connection-editor（安装图形界面才能使用）和nmtui，图形化修改网络设置。
临时设置网络
重启网络服务后失效
ifconfig eth0 10.0.0.10 netmask 255.0.0.0 #设置IP和子网掩码 route add default gw 10.0.0.1 #设置网关 ifconfig eth0 hw ether 00:11:00:00:11:11 #设置物理地址（MAC地址） ifconfig eth0 up #启用eth0网络 ifconfig eth0 down #关闭eth0网络
修改hosts文件
hosts文件路径为/etc/hosts，与windows的hosts修改方式相同。
After all,tomorrow is another day.
毕竟，明天又是崭新的一天。
《飘》
——玛格丽特·米切尔
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