dhcp 动态 ip 分配服务

安装：
yum -y install dhcp

配置：
vim /etc/dhcp/dhcpd.conf

     default-lease-time 600;
     max-lease-time 7200;
     subnet 192.168.1.0 netmask 255.255.255.0 {
         range 192.168.1.90 192.168.1.100;
         option routers 192.168.8.1;
     }
     host printer {
         hardware ethernet 00:0c:29:48:c5:a2;
         fixed-address 192.168.1.99;
     }

启动：
systemctl start dhcpd