shell脚本实现DNS的自动安装与配置

#!/bin/bash
read -p   "Please enter your zone:"  ZONE
read -p  "Please enter your IPNET,[Usage: 192.168.0.]:" NET
YOURIP=`ifconfig eth0| grep "inet addr" | sed 's/^.*addr://g' | sed 's/Bcast.*$//g'`
LAST=`echo $YOURIP | awk 'BEGIN {FS="."}{print $4}'`
FANXIANG=`echo $NET | awk 'BEGIN {FS="."}{print $3"."$2"."$1}'`
rpm -q bind &>/dev/null && rpm -q  caching-nameserver &>/dev/null
let BOOL=`echo $?`
if [ $BOOL -eq 1 ];  then
    yum -y install bind
    yum -y install caching-nameserver
fi


rpm -q bind &>/dev/null && rpm -q  caching-nameserver &>/dev/null
let BOOL2=`echo $?`
if [ $BOOL2 -eq 1 ]; then
  echo "Sorry,bind is not install!"  
  exit
fi
#********************************************
echo "make named.conf......"
cat>>/etc/named.conf<<EOF

  options {
        directory "/var/named";
};

zone "." IN {
         type hint;
         file "named.ca";
};

zone "localhost" IN {
        type master;
        file "localhost.zone";
};

zone "0.0.127.in-addr.arpa"  IN {
         type master;
         file "named.local";
};

zone "$ZONE" IN {
        type master;
        file "$ZONE.zone";
};

zone "$FANXIANG.in-addr.arpa" IN  {
        type master;
        file "$NET.zone";
};
EOF
#*******************************************
echo "make $ZONE.zone....."
echo '$TTL 86400' > /var/named/$ZONE.zone
cat>>/var/named/$ZONE.zone<<EOF
@    IN    SOA    $ZONE.   root.linna.com. (
                  2011021501
            1H
            10M
            7D   
            1D )
        IN     NS    ns.$ZONE.
        IN    MX 10    mail.$ZONE.
ns        IN    A    $YOURIP
mail        IN    A    $YOURIP
www        IN    A    $YOURIP
EOF

#******************************************
echo "make $NET.zone......"
echo '$TTL 86400' > /var/named/$NET.zone
cat>>/var/named/$NET.zone<<EOF
@    IN    SOA    $ZONE.   root.linna.com. (
                  2011021502
            1H
            10M
            7D   
            1D )
        IN     NS    ns.$ZONE.
$LAST        IN    PTR    ns.$ZONE.
$LAST        IN    PTR    mail.$ZONE.
$LAST        IN    PTR    www.$ZONE.
EOF
#*******************************************
service named configtest
echo "Checking........."
chown :named /etc/named.conf
chown :named /var/named/*
#sed -i 's/^nameserver.*$/nameserver $YOURIP/g' /etc/resolv.conf
echo -e "search example.com \n nameserver $YOURIP " > /etc/resolv.conf
#*******************************************
echo "OK!Well Down!"
#******************************************
wait

service named start
chkconfig named on
chkconfig named --list
#*****************************************
wait

dig -x $YOURIP

dig -t A $ZONE
#****************************************