DHCP脚本

#!/bin/bash
#dhcp安装脚本
#窦艳如
#2019-08-26
rpm -q dhcp &>/dev/null
if [ $? = 0 ]
        then
 echo "已有安装包"
 else
        echo "正在安装包"
yum -y install dhcp   &> /dev/null
fi
read -p "需要分配的网段：" dou
read -p "分配网络的区域：" yan ru
read -p "请输入网关："  yun
cat << END > /etc/dhcp/dhcpd.conf
option domain-name "example.org";
option domain-name-servers 202.106.0.20,8.8.8.8;

default-lease-time 600;
max-lease-time 7200;

subnet $dou netmask 255.255.255.0 {
  range $yan $ru;
  option routers $yun;
}
END
systemctl start dhcpd
systemctl enable dhcpd