通过脚本完成DNS自动配置，要求如下：
1、完成DNS基本配置
2、根据提示输入域名、区域文件名、记录类型、主机头、IP地址等信息完成添加域及记录的工作
#!/bin/bash
conf=/var/named/chroot/etc/named.conf
datadir=/var/named/chroot/var/named
rpm -q bind &> /dev/null
if [ $? -ne 0 ]; then
yum -y install bind bind-chroot caching-nameserver
fi
if [ ! -f $conf ];then
echo "options {
directory \"/var/named\";
};" > $conf
fi
read -p "please input domain_name:" domain
grep $domain $conf &> /dev/null
if [ $? -ne 0 ]; then
echo "zone \"$domain\" in {
type master;
file \"$domain\";
};" >> $conf
echo "\$ttl 86400
@ in soa ${domain}. root.${domain}. (
2013010101
3h
15m
1w
1d
)"> $datadir/$domain
while true
do
read -p "Type of recond(ns/a/cname/mx/ptr):" type
case $type in
ns)
echo $domain | grep "in-addr.arpa" &> /dev/null
if [ $? -eq 0 ]; then
read -p "hostname of FDQN:" fdqn
echo "@ in ns $fdqn.">> $datadir/$domain
else
read -p "head of hostname:" head
echo "@inns$head">> $datadir/$domain
fi
;;
a)
read -p "head of hostname:" head
read -p "ip address:" ip
echo "$headina$ip">> $datadir/$domain
;;
ptr)
read -p "ip address:" ip
read -p "hostname of FQDN:" fqdn
host=$(echo $ip | awk -F. '{print $4}')
echo "$hostinptr$fqdn.">> $datadir/$domain
;;
mx)
read -p "priority of recond:" priority
read -p "head of hostname:" head
read -p "ip address:" ip
echo "@inmx$priority$head">>$datadir/$domain
echo "$headina$ip">> $datadir/$domain
;;
cname)
read -p "please input aliase:" aliase
read -p "head of hostname:" head
echo "$aliaseincname$head">> $datadir/$domain
;;
esac
read -p "continue to do (yes/no)?" yn
if [ $yn = no ]; then
exit 0
fi
done
fi
