搭建DNS服务器的脚本出错，请大家指点一下错在哪啊？

[SIMENYU]

写了一个自动搭建DNS服务器的脚本，老是报错，查了半天也没看出哪里错了，请大家帮忙看看错在哪里？
平台RHEL6.2
报错信息：
Starting named: 
Error in named configuration:
zone localhost.localdomain/IN: loaded serial 0
zone localhost/IN: loaded serial 0
zone 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN: loaded serial 0
zone 1.0.0.127.in-addr.arpa/IN: loaded serial 0
zone 0.in-addr.arpa/IN: loaded serial 0
dns_rdata_fromtext: example.com.zone:2: unexpected token
dns_master_load: example.com.zone:8: syntax error
dns_master_load: example.com.zone:8: isc_lex_gettoken() failed: unbalanced quotes
dns_master_load: example.com.zone:8: unbalanced quotes
zone example.com/IN: loading from master file example.com.zone failed: unexpected token
zone example.com/IN: not loaded due to errors.
_default/example.com/IN: unexpected token
zone 80.168.192.in-addr.arpa/IN: loaded serial 0
[FAILED]

脚步原文如下：
#!/bin/bash
# Just need to reset variable "MYIP" and "MYDOMAIN" to yourself.

MYIP="192.168.80.6"
MYDOMAIN="example.com"

#--------------------------------------
# Don't change anything in the below, 
# unless you know what you are doing.


#--------------------------------------
# Install Packages.
#--------------------------------------
yum -y install bind bind-chroot


#--------------------------------------
# Modify "/etc/named.conf" 
#--------------------------------------
sed -i 's/127.0.0.1;/any;/g' /etc/named.conf
sed -i 's/localhost;/any;/g' /etc/named.conf


#--------------------------------------
# Modify "/etc/named.rfc1912.zones"
#--------------------------------------
grep "$MYDOMAIN" /etc/named.rfc1912.zones > /dev/null
if [ $? -ne 0 ]; then
cat >> /etc/named.rfc1912.zones << _EOF_
zone "$MYDOMAIN" IN {
        type master;
        file "$MYDOMAIN.zone";
        allow-update { none; };
};
zone "$(echo $MYIP | awk -F"." '{print $3"."$2"."$1}').in-addr.arpa" IN {
        type master;
        file "$(echo $MYIP | awk -F"." '{print $1"."$2"."$3}').zone";
        allow-update { none; };
};
_EOF_
fi


#--------------------------------------
# Create forward and backward resolve file
#--------------------------------------
/bin/cp -p /var/named/named.localhost /var/named/"$MYDOMAIN".zone
/bin/cp -p /var/named/named.localhost /var/named/"$(echo $MYIP | awk -F"." '{print $1"."$2"."$3}')".zone

cat > /var/named/"$MYDOMAIN".zone << _EOF_
\$TTL 1D
@   IN SOA  "$MYDOMAIN". rname.invalid. (
                                        0   ; serial
                                        1D  ; refresh
                                        1H  ; retry
                                        1W  ; expire
                                        3H )    ; minimum
                NS      "$MYDOMAIN".
$MYDOMAIN.      A       $MYIP
www             A       $MYIP
ftp             A       $MYIP
$MYDOMAIN.      MX 5    mail.$MYDOMAIN.
mail            A       $MYIP
_EOF_

cat > /var/named/"$(echo $MYIP | awk -F"." '{print $1"."$2"."$3}')".zone << _EOF_
\$TTL 1D
@ IN SOA  $MYDOMAIN. rname.invalid. (
                                        0   ; serial
                                        1D  ; refresh
                                        1H  ; retry
                                        1W  ; expire
                                        3H )    ; minimum
        NS      $MYDOMAIN.
76      PTR     $MYDOMAIN.
76      PTR     www.$MYDOMAIN.
76      PTR     ftp.$MYDOMAIN.
76      PTR     mail.$MYDOMAIN.
_EOF_


#--------------------------------------
# Modify "/etc/resolv.conf"
#--------------------------------------
cat > /etc/resolv.conf << _EOF_
search $MYDOMAIN
nameserver $MYIP
_EOF_


#--------------------------------------
# Restart DNS service
#--------------------------------------
/etc/init.d/named restart

[SIMENYU]

我自己又逐行排查了一遍，发现了2个问题：
1）正向解析文件中的MYDOMAIN变量多加了个双引号；
2）反向解析文件中的ip写成了76，本应是6；

修复了以上2个问题后，DNS能成功启动。
正向解析域名没问题。
但是反向还是解不出来，不知道怎么回事，忘了反向解析文件中要不要加A记录，我只有PTR记录。

[SIMENYU]

耶。搞定，修改一下反向解析文件就没问题了，结贴！
@ IN SOA  $MYDOMAIN. rname.invalid. (
                                        0   ; serial
                                        1D  ; refresh
                                        1H  ; retry
                                        1W  ; expire
                                        3H )    ; minimum
        NS      $MYDOMAIN.
$(echo $MYIP | awk -F"." '{print $4}')  PTR     $MYDOMAIN.
$(echo $MYIP | awk -F"." '{print $4}')  PTR     www.$MYDOMAIN.
$(echo $MYIP | awk -F"." '{print $4}')  PTR     ftp.$MYDOMAIN.
$(echo $MYIP | awk -F"." '{print $4}')  PTR     mail.$MYDOMAIN.

[SIMENYU]

来个人，把分领走。。。。

[shenshengfengzgw]

我跟你的问题不一样

[root@localhost named]# service named start
Starting named: 
Error in named configuration:
zone localhost.localdomain/IN: loaded serial 0
zone localhost/IN: loaded serial 0
zone 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN: loaded serial 0
zone 1.0.0.127.in-addr.arpa/IN: loaded serial 0
zone 0.in-addr.arpa/IN: loaded serial 0
zone localhost.localdomain/IN: loaded serial 0
zone localhost/IN: loaded serial 0
zone 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN: loaded serial 0
zone 1.0.0.127.in-addr.arpa/IN: loaded serial 0
zone 0.in-addr.arpa/IN: loaded serial 0
my.internal.zone.db:1: no TTL specified; using SOA MINTTL instead
zone my.internal.zone/IN: loaded serial 1
zone my.ddns.internal.zone/IN: loading from master file dynamic/my.ddns.internal.zone.db failed: file not found
zone my.ddns.internal.zone/IN: not loaded due to errors.
internal/my.ddns.internal.zone/IN: file not found
test.com.zone:12: unknown RR type 'www'
test.com.zone:13: unknown RR type 'mail'
zone test.com/IN: loading from master file test.com.zone failed: unknown class/type
zone test.com/IN: not loaded due to errors.
internal/test.com/IN: unknown class/type
my.external.zone.db:1: no TTL specified; using SOA MINTTL instead
zone my.external.zone/IN: loaded serial 1
                                                           [FAILED]

帮我分一下什么问题，看不懂……