shell之DHCP服务脚本

DHCP服务脚本

在运行脚本之前需要配置GNS3,可以看我之前的博客有详细教程

#!/bin/bashyum install dhcp -y  //安装DHCP服务yum install expect -y  //安装expect工具/usr/bin/expect <<-EOF    spawn cp /usr/share/doc/dhcp-4.2.5/dhcpd.conf.example /etc/dhcp/dhcpd.conf  //spawn追踪后面的命令expect{    //匹配        "cp*"  //用"*"代表后面一长串命令        {send "yes\r"}  //交互式输入yes  '\r'代表回车}        expect eofEOFcat <<-EOF >> /etc/dhcp/dhcpd.conf   //在DHCP配置文件中写入命令subnet 192.168.100.0 netmask 255.255.255.0 {    //网段，子网掩码  range 192.168.100.20 192.168.100.200;    //网段范围  option routers 192.168.100.1;     //网关EOF}EOFsystemctl stop firewalld.service  //关闭防火墙setenforce 0    //关闭增强功能systemctl start dhcpd  //开启DHCP服务