The Shell function method implements the monitoring web site URL

Using shell functions to implement monitoring web site URLs

[[email protected] scripts]# cat checkweb.sh#!/bin/ Bashfunction usage ()  {    echo $ "Usage:$0 url"      Exit 1}function check_url ()  {    wget --spider -q -o / DEV/NULL --TRIES=1 -T 5 $1    IF [ $? -EQ 0 ]       then         echo  "$  is yes. "     else         echo  "$1 is  No. "     fi}function main ()  {    if [ $# -ne  1 ]      then         usage     fi    check_url $1}main $* 

The script runs as follows

[[Email protected] scripts]# sh checkweb.shusage:checkweb.sh url[[email protected] scripts]# sh checkweb.sh www.baidu.co M www.baidu.com is yes. [[Email protected] scripts]# sh checkweb.sh www.baidu89988.comwww.baidu89988.com is no.[[email protected] scripts]#

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The Shell function method implements the monitoring web site URL