ssh用户登陆脚本

spyman

我想写一个ssh脚本,要求是15分钟内,如果某一用户登陆超过三次密码失败就锁定该用户,并且是在第三次失败开始计时,我本想通过切割日志进行运行,感觉太麻烦了,哪位老大,能不能把这简化一些,下面是我写的一部分.
echo -n "Enter login user:"
read us
yy=`awk -F: '{print $1}' /etc/passwd |grep $us`

if [ "$yy" == "" ]
then
   echo "then users is not exists"
   exit 0
else
   echo "then system have the user."
fi
while [ "$UID" == 0 ]
do
PASS=`cat /var/log/secure|sed -n -e '/Failed password/p'|grep $us |wc -l`

if [ $PASS -gt 3 ]
then
   /usr/bin/passwd -l $us
   echo "YOUR user is locked."
else
  /usr/bin/passwd -u $us
  echo "please try it again."
fi
sleep 1
done