#!/bin/bash

#修改IP及HOSTNAME

 ETHCONF=/etc/sysconfig/network-scripts/ifcfg-eth0

 HOSTS=/etc/hosts

 NETWORK=/etc/sysconfig/network

 DIR=/root/backup/`date +%Y%m%d`

 NETMASK=255.255.255.0

 
 rm -rf /etc/udev/rules.d/70-persistent-net.rules

 function Change_ip ()

{

if [ ! -d $DIR ];then

 mkdir -p $DIR

fi

 echo "Now Change ip address ,Doing Backup Interface eth0"

 cp $ETHCONF $DIR 

 read -p "Please insert ip Address:" IPADDR

 sed -i "s/IPADDR=.*/IPADDR=$IPADDR/g" $ETHCONF

 echo "This IP address Change success !"

}

function Change_hosts ()

{ 

if [ ! -d $DIR ];then

 mkdir -p $DIR

fi

 cp $HOSTS $DIR

 echo "Please insert IP and HOSTNAME"

 read -p "Please insert ip address": IPADDR

 read -p "Please insert HOSTNAME": HOSTNAMES

if [ -n $IPADDR -a -n $HOSTNAMES ];then

 echo $IPADDR  $HOSTNAMES >> $HOSTS

 sed -i "s/HOSTNAME=.*/HOSTNAME=$HOSTNAMES/g" $NETWORK

 echo "This hosts change success "

else

 echo "This $host IS Exist .........."

fi

}

 PS3="Please Select ip or hosts Menu":

 select i in "Change_ip" "Change_hosts" "Reboot" "Quit" 

do

case $i in

  Change_ip )

  Change_ip

;;

  Change_hosts )

  Change_hosts

;;

  Reboot )

  sync;sync;sync;init

;;

  Quit )

  exit

;;

  *)

  echo

  echo "Please Insert $0: Change_ip(1)|Change_hosts(2)"

  echo

;;

esac

done