Shell脚本实现自动修改IP地址

#!/bin/sh

#auto Change ip netmask gateway scripts

#wugk 2012-12-17

cat << EOF

++++++++自动修改ip和主机名等相关信息+++++++++

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

HOSTS=/etc/hosts

NETWORK=/etc/sysconfig/network

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

NETMASK=255.255.255.0

+++++++++-------------------------+++++++++++

EOF

#Define Path 定义变量，可以根据实际情况修改

  

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

 HOSTS=/etc/hosts

 NETWORK=/etc/sysconfig/network

 DIR=/data/backup/`date+%Y%m%d`

 NETMASK=255.255.255.0

  

echo "================================================"

echo

#定义change_ip函数

functionChange_ip ()

{

#判断备份目录是否存在，中括号前后都有空格，！叹号在shell表示相反的意思#

if

 [ ! -d $DIR ];then

  

 mkdir-p $DIR

  

fi

  

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

 cp$ETHCONF $DIR

  

 grep"dhcp" $ETHCONF

#如下$?用来判断上一次操作的状态，为0，表示上一次操作状态正确或者成功#

if

  

 [ $? -eq0 ];then

#read -p 交互输入变量IPADDR，注冒号后有空格，sed -i 修改配置文件#

 read-p "Please insert ip Address:"IPADDR

 sed-i 's/dhcp/static/g'$ETHCONF

#awk -F. 意思是以.号为分隔域，打印前三列#

 echo-e "IPADDR=$IPADDR\nNETMASK=$NETMASK\nGATEWAY=`echo $IPADDR|awk -F. '{print $1"."$2"."$3}'`.254">>$ETHCONF

 echo"This IP address Change success !"

  

else

  

 echo-n "This $ETHCONF is static exist ,please ensure Change Yes or NO":

 readi

  

fi

  

if

 ["$i" == "y"-o "$i" == "yes" ];then

 read-p "Please insert ip Address:"IPADDR

  

 count=(`echo$IPADDR|awk -F. '{print $1,$2,$3,$4}'`)

 #定义数组， ${#count[@]}代表获取变量值总个数#

 A=${#count[@]}

 #while条件语句判断，个数是否正确，不正确循环提示输入，也可以用[0-9]来判断ip#

while

  

 ["$A" -ne"4" ]

  

do

  

 read-p "Please re Inster ip Address,example 192.168.0.11 ip": IPADDR

 count=(`echo$IPADDR|awk -F. '{print $1,$2,$3,$4}'`)

 A=${#count[@]}

  

done

 #sed -e 可以连续修改多个参数#

 sed-i -e 's/^IPADDR/#IPADDR/g'-e 's/^NETMASK/#NETMASK/g'-e 's/^GATEWAY/#GATEWAY/g'$ETHCONF

 #echo -e \n为连续追加内容，并自动换行#

 echo-e "IPADDR=$IPADDR\nNETMASK=$NETMASK\nGATEWAY=`echo $IPADDR|awk -F. '{print $1"."$2"."$3}'`.254">>$ETHCONF

 echo"This IP address Change success !"

else

 echo"This $ETHCONF static exist,please exit"

 exit$?

  

fi

  

}

  

#定义hosts函数

############function hosts##############

functionChange_hosts ()

{

  

if

  

 [ ! -d $DIR ];then

 mkdir-p $DIR

  

fi

  

 cp$HOSTS $DIR

 read-p "Please insert ip address": IPADDR

  

 host=`echo$IPADDR|sed 's/\./-/g'`

 cat$HOSTS |grep 127.0.0.1 |grep "$host"

   

if

 [ $? -ne0 ];then

 sed-i "s/127.0.0.1/127.0.0.1 $host/g"$HOSTS

 echo"This hosts change success "

  

else

 echo"This $host IS Exist .........."

  

fi

  

}

  

###########fuction network###############

#定义network函数

functionChange_network ()

{

 if

  

 [ ! -d $DIR ];then

 mkdir-p $DIR

  

 fi

 cp$NETWORK $DIR

 read-p "Please insert ip address": IPADDR

  

 host=`echo$IPADDR|sed 's/\./-/g'`

 grep"$host" $NETWORK

  

 if

 [ $? -ne0 ];then

 sed-i "s/^HOSTNAME/#HOSTNAME/g"$NETWORK

 echo"NETWORK=$host" >>$NETWORK

  

else

 echo"This $host IS Exist .........."

  

 fi

  

}

  

#PS3一般为菜单提示信息#

 PS3="Please Select ip or hosts Menu":

#select为菜单选择命令，格式为select $var in ..command.. do .... done

 selecti in "Change_ip" "Change_hosts" "Change_network"

  

do

#case 方式，一般用于多种条件下的判断

case $i in

  Change_ip )

  Change_ip

;;

  Change_hosts )

  Change_hosts

;;

  Change_network )

  Change_network

;;

  *)

  echo

  echo"Please Insert $0: Change_ip(1)|Change_hosts(2)|Change_network(3)"

  echo

;;

esac

  

done