脚本实现方便配置DHCP-server

#!/bin/bash

echo 'the script is install dhcpd server'

read -p "please insert rhel5-cd to cdrom and enter to next:"aa

mount /dev/cdrom /media/ &>/dev/null

rpm -Uvh /media/Server/dhcp-*  &>/dev/null

echo "请为本机配置ＩＰ地址"

read -p "请输入ＩＰ地址:" ip

read -p　"请输入掩码:" ip_mask

MACADDR=$(ifconfig eth0 |grep eth0|awk '{print $5}')

cat >/etc/sysconfig/network-scripts/ifcfg-eth0 <<EOF

DEVICE=eth0

ONBOOT=yes

BOOTPROTO=static

IPADDR=$ip

NETMASK=$ip_mask

HWADDR=$MACADDR

EOF

echo "正在为你启用新配置的ＩＰ地址"

ifdown eth0;ifup eth0

echo "ＩＰ地址已经生效"

read -p "请为ＤＨＣＰ配置网段:" dhcp_net

read -p "请为ＤＨＣＰ配置掩码:" dhcp_mask

read -p "请为ＤＨＣＰ配置网关:" dhcp_gw

read -p "请为ＤＨＣＰ配置分配的开始ＩＰ:" dhcp_bigin

read -p "请为ＤＨＣＰ配置结束ＩＰ:" dhcp_over

cat >/etc/dhcpd.conf <<EOF   //dhcp3的配置文件默认安装在/etc下，dhcp4则会安装在/etc/dhcp下，注意自己的路径

ddns-update-style interim;

ignore client-updates;

subnet $dhcp_net netmask $dhcp_mask {

        option routers                  $dhcp_gw;

        option subnet-mask              $dhcp_mask;

        range $dhcp_bigin $dhcp_over;

        default-lease-time 21600;

        max-lease-time 43200;

}

EOF

service dhcpd start &>/dev/null

netstat -anpl |grep :67