wget_test_url_one.sh

#!/bin/bash
#单个网站域名测试连通性。
function usage(){
	echo $"usage:$0 url"
	exit 1
} 

function check_url(){
	wget --spider -q -o /dev/null --tries=1 -T 5 $1 
	if [ $? -eq 0 ]
	   then
	      echo "$1 is yes"
	else 
	      echo "$1 is no"
        fi 


}

function main(){
	if [ $# -ne 1 ]
	    then
	        usage 
        fi
 	check_url $1

}

main $*