监控网站URL是否正常

#!/bin/sh
#monitor URL
#by zkg 2019-08-13

#打印提示信息函数
Usage(){
echo "Usage:sh $0 URL"
exit 1
}

#检查URL函数
CheckUrl(){
wget -T 10 --spider -t 2 $1 &>/dev/null
if [ $? -eq 0 ];then
echo "$1 is Normal links"
exit 0
else
echo "$1 is not Normal links"
exit 2
fi
}
#主函数
main(){
if [ $# -ne 1 ];then
Usage
fi
CheckUrl $1
}
main $*